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swarm: integrate OpenTracing; propagate ctx to internal APIs (#17169)

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* swarm: propagate ctx, enable opentracing

* swarm/tracing: log error when tracing is misconfigured
This commit is contained in:
Anton Evangelatov
2018-07-13 17:40:28 +02:00
committed by Balint Gabor
parent f7d3678c28
commit 7c9314f231
170 changed files with 21762 additions and 249 deletions
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The MIT License (MIT)
Copyright (c) 2014 Coda Hale
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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hdrhistogram
============
[![Build Status](https://travis-ci.org/codahale/hdrhistogram.png?branch=master)](https://travis-ci.org/codahale/hdrhistogram)
A pure Go implementation of the [HDR Histogram](https://github.com/HdrHistogram/HdrHistogram).
> A Histogram that supports recording and analyzing sampled data value counts
> across a configurable integer value range with configurable value precision
> within the range. Value precision is expressed as the number of significant
> digits in the value recording, and provides control over value quantization
> behavior across the value range and the subsequent value resolution at any
> given level.
For documentation, check [godoc](http://godoc.org/github.com/codahale/hdrhistogram).

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// Package hdrhistogram provides an implementation of Gil Tene's HDR Histogram
// data structure. The HDR Histogram allows for fast and accurate analysis of
// the extreme ranges of data with non-normal distributions, like latency.
package hdrhistogram
import (
"fmt"
"math"
)
// A Bracket is a part of a cumulative distribution.
type Bracket struct {
Quantile float64
Count, ValueAt int64
}
// A Snapshot is an exported view of a Histogram, useful for serializing them.
// A Histogram can be constructed from it by passing it to Import.
type Snapshot struct {
LowestTrackableValue int64
HighestTrackableValue int64
SignificantFigures int64
Counts []int64
}
// A Histogram is a lossy data structure used to record the distribution of
// non-normally distributed data (like latency) with a high degree of accuracy
// and a bounded degree of precision.
type Histogram struct {
lowestTrackableValue int64
highestTrackableValue int64
unitMagnitude int64
significantFigures int64
subBucketHalfCountMagnitude int32
subBucketHalfCount int32
subBucketMask int64
subBucketCount int32
bucketCount int32
countsLen int32
totalCount int64
counts []int64
}
// New returns a new Histogram instance capable of tracking values in the given
// range and with the given amount of precision.
func New(minValue, maxValue int64, sigfigs int) *Histogram {
if sigfigs < 1 || 5 < sigfigs {
panic(fmt.Errorf("sigfigs must be [1,5] (was %d)", sigfigs))
}
largestValueWithSingleUnitResolution := 2 * math.Pow10(sigfigs)
subBucketCountMagnitude := int32(math.Ceil(math.Log2(float64(largestValueWithSingleUnitResolution))))
subBucketHalfCountMagnitude := subBucketCountMagnitude
if subBucketHalfCountMagnitude < 1 {
subBucketHalfCountMagnitude = 1
}
subBucketHalfCountMagnitude--
unitMagnitude := int32(math.Floor(math.Log2(float64(minValue))))
if unitMagnitude < 0 {
unitMagnitude = 0
}
subBucketCount := int32(math.Pow(2, float64(subBucketHalfCountMagnitude)+1))
subBucketHalfCount := subBucketCount / 2
subBucketMask := int64(subBucketCount-1) << uint(unitMagnitude)
// determine exponent range needed to support the trackable value with no
// overflow:
smallestUntrackableValue := int64(subBucketCount) << uint(unitMagnitude)
bucketsNeeded := int32(1)
for smallestUntrackableValue < maxValue {
smallestUntrackableValue <<= 1
bucketsNeeded++
}
bucketCount := bucketsNeeded
countsLen := (bucketCount + 1) * (subBucketCount / 2)
return &Histogram{
lowestTrackableValue: minValue,
highestTrackableValue: maxValue,
unitMagnitude: int64(unitMagnitude),
significantFigures: int64(sigfigs),
subBucketHalfCountMagnitude: subBucketHalfCountMagnitude,
subBucketHalfCount: subBucketHalfCount,
subBucketMask: subBucketMask,
subBucketCount: subBucketCount,
bucketCount: bucketCount,
countsLen: countsLen,
totalCount: 0,
counts: make([]int64, countsLen),
}
}
// ByteSize returns an estimate of the amount of memory allocated to the
// histogram in bytes.
//
// N.B.: This does not take into account the overhead for slices, which are
// small, constant, and specific to the compiler version.
func (h *Histogram) ByteSize() int {
return 6*8 + 5*4 + len(h.counts)*8
}
// Merge merges the data stored in the given histogram with the receiver,
// returning the number of recorded values which had to be dropped.
func (h *Histogram) Merge(from *Histogram) (dropped int64) {
i := from.rIterator()
for i.next() {
v := i.valueFromIdx
c := i.countAtIdx
if h.RecordValues(v, c) != nil {
dropped += c
}
}
return
}
// TotalCount returns total number of values recorded.
func (h *Histogram) TotalCount() int64 {
return h.totalCount
}
// Max returns the approximate maximum recorded value.
func (h *Histogram) Max() int64 {
var max int64
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 {
max = i.highestEquivalentValue
}
}
return h.highestEquivalentValue(max)
}
// Min returns the approximate minimum recorded value.
func (h *Histogram) Min() int64 {
var min int64
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 && min == 0 {
min = i.highestEquivalentValue
break
}
}
return h.lowestEquivalentValue(min)
}
// Mean returns the approximate arithmetic mean of the recorded values.
func (h *Histogram) Mean() float64 {
if h.totalCount == 0 {
return 0
}
var total int64
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 {
total += i.countAtIdx * h.medianEquivalentValue(i.valueFromIdx)
}
}
return float64(total) / float64(h.totalCount)
}
// StdDev returns the approximate standard deviation of the recorded values.
func (h *Histogram) StdDev() float64 {
if h.totalCount == 0 {
return 0
}
mean := h.Mean()
geometricDevTotal := 0.0
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 {
dev := float64(h.medianEquivalentValue(i.valueFromIdx)) - mean
geometricDevTotal += (dev * dev) * float64(i.countAtIdx)
}
}
return math.Sqrt(geometricDevTotal / float64(h.totalCount))
}
// Reset deletes all recorded values and restores the histogram to its original
// state.
func (h *Histogram) Reset() {
h.totalCount = 0
for i := range h.counts {
h.counts[i] = 0
}
}
// RecordValue records the given value, returning an error if the value is out
// of range.
func (h *Histogram) RecordValue(v int64) error {
return h.RecordValues(v, 1)
}
// RecordCorrectedValue records the given value, correcting for stalls in the
// recording process. This only works for processes which are recording values
// at an expected interval (e.g., doing jitter analysis). Processes which are
// recording ad-hoc values (e.g., latency for incoming requests) can't take
// advantage of this.
func (h *Histogram) RecordCorrectedValue(v, expectedInterval int64) error {
if err := h.RecordValue(v); err != nil {
return err
}
if expectedInterval <= 0 || v <= expectedInterval {
return nil
}
missingValue := v - expectedInterval
for missingValue >= expectedInterval {
if err := h.RecordValue(missingValue); err != nil {
return err
}
missingValue -= expectedInterval
}
return nil
}
// RecordValues records n occurrences of the given value, returning an error if
// the value is out of range.
func (h *Histogram) RecordValues(v, n int64) error {
idx := h.countsIndexFor(v)
if idx < 0 || int(h.countsLen) <= idx {
return fmt.Errorf("value %d is too large to be recorded", v)
}
h.counts[idx] += n
h.totalCount += n
return nil
}
// ValueAtQuantile returns the recorded value at the given quantile (0..100).
func (h *Histogram) ValueAtQuantile(q float64) int64 {
if q > 100 {
q = 100
}
total := int64(0)
countAtPercentile := int64(((q / 100) * float64(h.totalCount)) + 0.5)
i := h.iterator()
for i.next() {
total += i.countAtIdx
if total >= countAtPercentile {
return h.highestEquivalentValue(i.valueFromIdx)
}
}
return 0
}
// CumulativeDistribution returns an ordered list of brackets of the
// distribution of recorded values.
func (h *Histogram) CumulativeDistribution() []Bracket {
var result []Bracket
i := h.pIterator(1)
for i.next() {
result = append(result, Bracket{
Quantile: i.percentile,
Count: i.countToIdx,
ValueAt: i.highestEquivalentValue,
})
}
return result
}
// SignificantFigures returns the significant figures used to create the
// histogram
func (h *Histogram) SignificantFigures() int64 {
return h.significantFigures
}
// LowestTrackableValue returns the lower bound on values that will be added
// to the histogram
func (h *Histogram) LowestTrackableValue() int64 {
return h.lowestTrackableValue
}
// HighestTrackableValue returns the upper bound on values that will be added
// to the histogram
func (h *Histogram) HighestTrackableValue() int64 {
return h.highestTrackableValue
}
// Histogram bar for plotting
type Bar struct {
From, To, Count int64
}
// Pretty print as csv for easy plotting
func (b Bar) String() string {
return fmt.Sprintf("%v, %v, %v\n", b.From, b.To, b.Count)
}
// Distribution returns an ordered list of bars of the
// distribution of recorded values, counts can be normalized to a probability
func (h *Histogram) Distribution() (result []Bar) {
i := h.iterator()
for i.next() {
result = append(result, Bar{
Count: i.countAtIdx,
From: h.lowestEquivalentValue(i.valueFromIdx),
To: i.highestEquivalentValue,
})
}
return result
}
// Equals returns true if the two Histograms are equivalent, false if not.
func (h *Histogram) Equals(other *Histogram) bool {
switch {
case
h.lowestTrackableValue != other.lowestTrackableValue,
h.highestTrackableValue != other.highestTrackableValue,
h.unitMagnitude != other.unitMagnitude,
h.significantFigures != other.significantFigures,
h.subBucketHalfCountMagnitude != other.subBucketHalfCountMagnitude,
h.subBucketHalfCount != other.subBucketHalfCount,
h.subBucketMask != other.subBucketMask,
h.subBucketCount != other.subBucketCount,
h.bucketCount != other.bucketCount,
h.countsLen != other.countsLen,
h.totalCount != other.totalCount:
return false
default:
for i, c := range h.counts {
if c != other.counts[i] {
return false
}
}
}
return true
}
// Export returns a snapshot view of the Histogram. This can be later passed to
// Import to construct a new Histogram with the same state.
func (h *Histogram) Export() *Snapshot {
return &Snapshot{
LowestTrackableValue: h.lowestTrackableValue,
HighestTrackableValue: h.highestTrackableValue,
SignificantFigures: h.significantFigures,
Counts: append([]int64(nil), h.counts...), // copy
}
}
// Import returns a new Histogram populated from the Snapshot data (which the
// caller must stop accessing).
func Import(s *Snapshot) *Histogram {
h := New(s.LowestTrackableValue, s.HighestTrackableValue, int(s.SignificantFigures))
h.counts = s.Counts
totalCount := int64(0)
for i := int32(0); i < h.countsLen; i++ {
countAtIndex := h.counts[i]
if countAtIndex > 0 {
totalCount += countAtIndex
}
}
h.totalCount = totalCount
return h
}
func (h *Histogram) iterator() *iterator {
return &iterator{
h: h,
subBucketIdx: -1,
}
}
func (h *Histogram) rIterator() *rIterator {
return &rIterator{
iterator: iterator{
h: h,
subBucketIdx: -1,
},
}
}
func (h *Histogram) pIterator(ticksPerHalfDistance int32) *pIterator {
return &pIterator{
iterator: iterator{
h: h,
subBucketIdx: -1,
},
ticksPerHalfDistance: ticksPerHalfDistance,
}
}
func (h *Histogram) sizeOfEquivalentValueRange(v int64) int64 {
bucketIdx := h.getBucketIndex(v)
subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
adjustedBucket := bucketIdx
if subBucketIdx >= h.subBucketCount {
adjustedBucket++
}
return int64(1) << uint(h.unitMagnitude+int64(adjustedBucket))
}
func (h *Histogram) valueFromIndex(bucketIdx, subBucketIdx int32) int64 {
return int64(subBucketIdx) << uint(int64(bucketIdx)+h.unitMagnitude)
}
func (h *Histogram) lowestEquivalentValue(v int64) int64 {
bucketIdx := h.getBucketIndex(v)
subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
return h.valueFromIndex(bucketIdx, subBucketIdx)
}
func (h *Histogram) nextNonEquivalentValue(v int64) int64 {
return h.lowestEquivalentValue(v) + h.sizeOfEquivalentValueRange(v)
}
func (h *Histogram) highestEquivalentValue(v int64) int64 {
return h.nextNonEquivalentValue(v) - 1
}
func (h *Histogram) medianEquivalentValue(v int64) int64 {
return h.lowestEquivalentValue(v) + (h.sizeOfEquivalentValueRange(v) >> 1)
}
func (h *Histogram) getCountAtIndex(bucketIdx, subBucketIdx int32) int64 {
return h.counts[h.countsIndex(bucketIdx, subBucketIdx)]
}
func (h *Histogram) countsIndex(bucketIdx, subBucketIdx int32) int32 {
bucketBaseIdx := (bucketIdx + 1) << uint(h.subBucketHalfCountMagnitude)
offsetInBucket := subBucketIdx - h.subBucketHalfCount
return bucketBaseIdx + offsetInBucket
}
func (h *Histogram) getBucketIndex(v int64) int32 {
pow2Ceiling := bitLen(v | h.subBucketMask)
return int32(pow2Ceiling - int64(h.unitMagnitude) -
int64(h.subBucketHalfCountMagnitude+1))
}
func (h *Histogram) getSubBucketIdx(v int64, idx int32) int32 {
return int32(v >> uint(int64(idx)+int64(h.unitMagnitude)))
}
func (h *Histogram) countsIndexFor(v int64) int {
bucketIdx := h.getBucketIndex(v)
subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
return int(h.countsIndex(bucketIdx, subBucketIdx))
}
type iterator struct {
h *Histogram
bucketIdx, subBucketIdx int32
countAtIdx, countToIdx, valueFromIdx int64
highestEquivalentValue int64
}
func (i *iterator) next() bool {
if i.countToIdx >= i.h.totalCount {
return false
}
// increment bucket
i.subBucketIdx++
if i.subBucketIdx >= i.h.subBucketCount {
i.subBucketIdx = i.h.subBucketHalfCount
i.bucketIdx++
}
if i.bucketIdx >= i.h.bucketCount {
return false
}
i.countAtIdx = i.h.getCountAtIndex(i.bucketIdx, i.subBucketIdx)
i.countToIdx += i.countAtIdx
i.valueFromIdx = i.h.valueFromIndex(i.bucketIdx, i.subBucketIdx)
i.highestEquivalentValue = i.h.highestEquivalentValue(i.valueFromIdx)
return true
}
type rIterator struct {
iterator
countAddedThisStep int64
}
func (r *rIterator) next() bool {
for r.iterator.next() {
if r.countAtIdx != 0 {
r.countAddedThisStep = r.countAtIdx
return true
}
}
return false
}
type pIterator struct {
iterator
seenLastValue bool
ticksPerHalfDistance int32
percentileToIteratorTo float64
percentile float64
}
func (p *pIterator) next() bool {
if !(p.countToIdx < p.h.totalCount) {
if p.seenLastValue {
return false
}
p.seenLastValue = true
p.percentile = 100
return true
}
if p.subBucketIdx == -1 && !p.iterator.next() {
return false
}
var done = false
for !done {
currentPercentile := (100.0 * float64(p.countToIdx)) / float64(p.h.totalCount)
if p.countAtIdx != 0 && p.percentileToIteratorTo <= currentPercentile {
p.percentile = p.percentileToIteratorTo
halfDistance := math.Trunc(math.Pow(2, math.Trunc(math.Log2(100.0/(100.0-p.percentileToIteratorTo)))+1))
percentileReportingTicks := float64(p.ticksPerHalfDistance) * halfDistance
p.percentileToIteratorTo += 100.0 / percentileReportingTicks
return true
}
done = !p.iterator.next()
}
return true
}
func bitLen(x int64) (n int64) {
for ; x >= 0x8000; x >>= 16 {
n += 16
}
if x >= 0x80 {
x >>= 8
n += 8
}
if x >= 0x8 {
x >>= 4
n += 4
}
if x >= 0x2 {
x >>= 2
n += 2
}
if x >= 0x1 {
n++
}
return
}

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package hdrhistogram
// A WindowedHistogram combines histograms to provide windowed statistics.
type WindowedHistogram struct {
idx int
h []Histogram
m *Histogram
Current *Histogram
}
// NewWindowed creates a new WindowedHistogram with N underlying histograms with
// the given parameters.
func NewWindowed(n int, minValue, maxValue int64, sigfigs int) *WindowedHistogram {
w := WindowedHistogram{
idx: -1,
h: make([]Histogram, n),
m: New(minValue, maxValue, sigfigs),
}
for i := range w.h {
w.h[i] = *New(minValue, maxValue, sigfigs)
}
w.Rotate()
return &w
}
// Merge returns a histogram which includes the recorded values from all the
// sections of the window.
func (w *WindowedHistogram) Merge() *Histogram {
w.m.Reset()
for _, h := range w.h {
w.m.Merge(&h)
}
return w.m
}
// Rotate resets the oldest histogram and rotates it to be used as the current
// histogram.
func (w *WindowedHistogram) Rotate() {
w.idx++
w.Current = &w.h[w.idx%len(w.h)]
w.Current.Reset()
}

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Changes by Version
==================
1.1.0 (unreleased)
-------------------
- Deprecate InitGlobalTracer() in favor of SetGlobalTracer()
1.0.0 (2016-09-26)
-------------------
- This release implements OpenTracing Specification 1.0 (http://opentracing.io/spec)

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whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright 2016 The OpenTracing Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

32
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PACKAGES := . ./mocktracer/... ./ext/...
.DEFAULT_GOAL := test-and-lint
.PHONE: test-and-lint
test-and-lint: test lint
.PHONY: test
test:
go test -v -cover -race ./...
cover:
@rm -rf cover-all.out
$(foreach pkg, $(PACKAGES), $(MAKE) cover-pkg PKG=$(pkg) || true;)
@grep mode: cover.out > coverage.out
@cat cover-all.out >> coverage.out
go tool cover -html=coverage.out -o cover.html
@rm -rf cover.out cover-all.out coverage.out
cover-pkg:
go test -coverprofile cover.out $(PKG)
@grep -v mode: cover.out >> cover-all.out
.PHONY: lint
lint:
go fmt ./...
golint ./...
@# Run again with magic to exit non-zero if golint outputs anything.
@! (golint ./... | read dummy)
go vet ./...

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[![Gitter chat](http://img.shields.io/badge/gitter-join%20chat%20%E2%86%92-brightgreen.svg)](https://gitter.im/opentracing/public) [![Build Status](https://travis-ci.org/opentracing/opentracing-go.svg?branch=master)](https://travis-ci.org/opentracing/opentracing-go) [![GoDoc](https://godoc.org/github.com/opentracing/opentracing-go?status.svg)](http://godoc.org/github.com/opentracing/opentracing-go)
[![Sourcegraph Badge](https://sourcegraph.com/github.com/opentracing/opentracing-go/-/badge.svg)](https://sourcegraph.com/github.com/opentracing/opentracing-go?badge)
# OpenTracing API for Go
This package is a Go platform API for OpenTracing.
## Required Reading
In order to understand the Go platform API, one must first be familiar with the
[OpenTracing project](http://opentracing.io) and
[terminology](http://opentracing.io/documentation/pages/spec.html) more specifically.
## API overview for those adding instrumentation
Everyday consumers of this `opentracing` package really only need to worry
about a couple of key abstractions: the `StartSpan` function, the `Span`
interface, and binding a `Tracer` at `main()`-time. Here are code snippets
demonstrating some important use cases.
#### Singleton initialization
The simplest starting point is `./default_tracer.go`. As early as possible, call
```go
import "github.com/opentracing/opentracing-go"
import ".../some_tracing_impl"
func main() {
opentracing.SetGlobalTracer(
// tracing impl specific:
some_tracing_impl.New(...),
)
...
}
```
#### Non-Singleton initialization
If you prefer direct control to singletons, manage ownership of the
`opentracing.Tracer` implementation explicitly.
#### Creating a Span given an existing Go `context.Context`
If you use `context.Context` in your application, OpenTracing's Go library will
happily rely on it for `Span` propagation. To start a new (blocking child)
`Span`, you can use `StartSpanFromContext`.
```go
func xyz(ctx context.Context, ...) {
...
span, ctx := opentracing.StartSpanFromContext(ctx, "operation_name")
defer span.Finish()
span.LogFields(
log.String("event", "soft error"),
log.String("type", "cache timeout"),
log.Int("waited.millis", 1500))
...
}
```
#### Starting an empty trace by creating a "root span"
It's always possible to create a "root" `Span` with no parent or other causal
reference.
```go
func xyz() {
...
sp := opentracing.StartSpan("operation_name")
defer sp.Finish()
...
}
```
#### Creating a (child) Span given an existing (parent) Span
```go
func xyz(parentSpan opentracing.Span, ...) {
...
sp := opentracing.StartSpan(
"operation_name",
opentracing.ChildOf(parentSpan.Context()))
defer sp.Finish()
...
}
```
#### Serializing to the wire
```go
func makeSomeRequest(ctx context.Context) ... {
if span := opentracing.SpanFromContext(ctx); span != nil {
httpClient := &http.Client{}
httpReq, _ := http.NewRequest("GET", "http://myservice/", nil)
// Transmit the span's TraceContext as HTTP headers on our
// outbound request.
opentracing.GlobalTracer().Inject(
span.Context(),
opentracing.HTTPHeaders,
opentracing.HTTPHeadersCarrier(httpReq.Header))
resp, err := httpClient.Do(httpReq)
...
}
...
}
```
#### Deserializing from the wire
```go
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
var serverSpan opentracing.Span
appSpecificOperationName := ...
wireContext, err := opentracing.GlobalTracer().Extract(
opentracing.HTTPHeaders,
opentracing.HTTPHeadersCarrier(req.Header))
if err != nil {
// Optionally record something about err here
}
// Create the span referring to the RPC client if available.
// If wireContext == nil, a root span will be created.
serverSpan = opentracing.StartSpan(
appSpecificOperationName,
ext.RPCServerOption(wireContext))
defer serverSpan.Finish()
ctx := opentracing.ContextWithSpan(context.Background(), serverSpan)
...
}
```
#### Conditionally capture a field using `log.Noop`
In some situations, you may want to dynamically decide whether or not
to log a field. For example, you may want to capture additional data,
such as a customer ID, in non-production environments:
```go
func Customer(order *Order) log.Field {
if os.Getenv("ENVIRONMENT") == "dev" {
return log.String("customer", order.Customer.ID)
}
return log.Noop()
}
```
#### Goroutine-safety
The entire public API is goroutine-safe and does not require external
synchronization.
## API pointers for those implementing a tracing system
Tracing system implementors may be able to reuse or copy-paste-modify the `basictracer` package, found [here](https://github.com/opentracing/basictracer-go). In particular, see `basictracer.New(...)`.
## API compatibility
For the time being, "mild" backwards-incompatible changes may be made without changing the major version number. As OpenTracing and `opentracing-go` mature, backwards compatibility will become more of a priority.
## Tracer test suite
A test suite is available in the [harness](https://godoc.org/github.com/opentracing/opentracing-go/harness) package that can assist Tracer implementors to assert that their Tracer is working correctly.
## Licensing
[Apache 2.0 License](./LICENSE).

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package ext
import opentracing "github.com/opentracing/opentracing-go"
// These constants define common tag names recommended for better portability across
// tracing systems and languages/platforms.
//
// The tag names are defined as typed strings, so that in addition to the usual use
//
// span.setTag(TagName, value)
//
// they also support value type validation via this additional syntax:
//
// TagName.Set(span, value)
//
var (
//////////////////////////////////////////////////////////////////////
// SpanKind (client/server or producer/consumer)
//////////////////////////////////////////////////////////////////////
// SpanKind hints at relationship between spans, e.g. client/server
SpanKind = spanKindTagName("span.kind")
// SpanKindRPCClient marks a span representing the client-side of an RPC
// or other remote call
SpanKindRPCClientEnum = SpanKindEnum("client")
SpanKindRPCClient = opentracing.Tag{Key: string(SpanKind), Value: SpanKindRPCClientEnum}
// SpanKindRPCServer marks a span representing the server-side of an RPC
// or other remote call
SpanKindRPCServerEnum = SpanKindEnum("server")
SpanKindRPCServer = opentracing.Tag{Key: string(SpanKind), Value: SpanKindRPCServerEnum}
// SpanKindProducer marks a span representing the producer-side of a
// message bus
SpanKindProducerEnum = SpanKindEnum("producer")
SpanKindProducer = opentracing.Tag{Key: string(SpanKind), Value: SpanKindProducerEnum}
// SpanKindConsumer marks a span representing the consumer-side of a
// message bus
SpanKindConsumerEnum = SpanKindEnum("consumer")
SpanKindConsumer = opentracing.Tag{Key: string(SpanKind), Value: SpanKindConsumerEnum}
//////////////////////////////////////////////////////////////////////
// Component name
//////////////////////////////////////////////////////////////////////
// Component is a low-cardinality identifier of the module, library,
// or package that is generating a span.
Component = stringTagName("component")
//////////////////////////////////////////////////////////////////////
// Sampling hint
//////////////////////////////////////////////////////////////////////
// SamplingPriority determines the priority of sampling this Span.
SamplingPriority = uint16TagName("sampling.priority")
//////////////////////////////////////////////////////////////////////
// Peer tags. These tags can be emitted by either client-side of
// server-side to describe the other side/service in a peer-to-peer
// communications, like an RPC call.
//////////////////////////////////////////////////////////////////////
// PeerService records the service name of the peer.
PeerService = stringTagName("peer.service")
// PeerAddress records the address name of the peer. This may be a "ip:port",
// a bare "hostname", a FQDN or even a database DSN substring
// like "mysql://username@127.0.0.1:3306/dbname"
PeerAddress = stringTagName("peer.address")
// PeerHostname records the host name of the peer
PeerHostname = stringTagName("peer.hostname")
// PeerHostIPv4 records IP v4 host address of the peer
PeerHostIPv4 = ipv4Tag("peer.ipv4")
// PeerHostIPv6 records IP v6 host address of the peer
PeerHostIPv6 = stringTagName("peer.ipv6")
// PeerPort records port number of the peer
PeerPort = uint16TagName("peer.port")
//////////////////////////////////////////////////////////////////////
// HTTP Tags
//////////////////////////////////////////////////////////////////////
// HTTPUrl should be the URL of the request being handled in this segment
// of the trace, in standard URI format. The protocol is optional.
HTTPUrl = stringTagName("http.url")
// HTTPMethod is the HTTP method of the request, and is case-insensitive.
HTTPMethod = stringTagName("http.method")
// HTTPStatusCode is the numeric HTTP status code (200, 404, etc) of the
// HTTP response.
HTTPStatusCode = uint16TagName("http.status_code")
//////////////////////////////////////////////////////////////////////
// DB Tags
//////////////////////////////////////////////////////////////////////
// DBInstance is database instance name.
DBInstance = stringTagName("db.instance")
// DBStatement is a database statement for the given database type.
// It can be a query or a prepared statement (i.e., before substitution).
DBStatement = stringTagName("db.statement")
// DBType is a database type. For any SQL database, "sql".
// For others, the lower-case database category, e.g. "redis"
DBType = stringTagName("db.type")
// DBUser is a username for accessing database.
DBUser = stringTagName("db.user")
//////////////////////////////////////////////////////////////////////
// Message Bus Tag
//////////////////////////////////////////////////////////////////////
// MessageBusDestination is an address at which messages can be exchanged
MessageBusDestination = stringTagName("message_bus.destination")
//////////////////////////////////////////////////////////////////////
// Error Tag
//////////////////////////////////////////////////////////////////////
// Error indicates that operation represented by the span resulted in an error.
Error = boolTagName("error")
)
// ---
// SpanKindEnum represents common span types
type SpanKindEnum string
type spanKindTagName string
// Set adds a string tag to the `span`
func (tag spanKindTagName) Set(span opentracing.Span, value SpanKindEnum) {
span.SetTag(string(tag), value)
}
type rpcServerOption struct {
clientContext opentracing.SpanContext
}
func (r rpcServerOption) Apply(o *opentracing.StartSpanOptions) {
if r.clientContext != nil {
opentracing.ChildOf(r.clientContext).Apply(o)
}
SpanKindRPCServer.Apply(o)
}
// RPCServerOption returns a StartSpanOption appropriate for an RPC server span
// with `client` representing the metadata for the remote peer Span if available.
// In case client == nil, due to the client not being instrumented, this RPC
// server span will be a root span.
func RPCServerOption(client opentracing.SpanContext) opentracing.StartSpanOption {
return rpcServerOption{client}
}
// ---
type stringTagName string
// Set adds a string tag to the `span`
func (tag stringTagName) Set(span opentracing.Span, value string) {
span.SetTag(string(tag), value)
}
// ---
type uint32TagName string
// Set adds a uint32 tag to the `span`
func (tag uint32TagName) Set(span opentracing.Span, value uint32) {
span.SetTag(string(tag), value)
}
// ---
type uint16TagName string
// Set adds a uint16 tag to the `span`
func (tag uint16TagName) Set(span opentracing.Span, value uint16) {
span.SetTag(string(tag), value)
}
// ---
type boolTagName string
// Add adds a bool tag to the `span`
func (tag boolTagName) Set(span opentracing.Span, value bool) {
span.SetTag(string(tag), value)
}
type ipv4Tag string
// Set adds IP v4 host address of the peer as an uint32 value to the `span`, keep this for backward and zipkin compatibility
func (tag ipv4Tag) Set(span opentracing.Span, value uint32) {
span.SetTag(string(tag), value)
}
// SetString records IP v4 host address of the peer as a .-separated tuple to the `span`. E.g., "127.0.0.1"
func (tag ipv4Tag) SetString(span opentracing.Span, value string) {
span.SetTag(string(tag), value)
}

32
vendor/github.com/opentracing/opentracing-go/globaltracer.go generated vendored Normal file
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package opentracing
var (
globalTracer Tracer = NoopTracer{}
)
// SetGlobalTracer sets the [singleton] opentracing.Tracer returned by
// GlobalTracer(). Those who use GlobalTracer (rather than directly manage an
// opentracing.Tracer instance) should call SetGlobalTracer as early as
// possible in main(), prior to calling the `StartSpan` global func below.
// Prior to calling `SetGlobalTracer`, any Spans started via the `StartSpan`
// (etc) globals are noops.
func SetGlobalTracer(tracer Tracer) {
globalTracer = tracer
}
// GlobalTracer returns the global singleton `Tracer` implementation.
// Before `SetGlobalTracer()` is called, the `GlobalTracer()` is a noop
// implementation that drops all data handed to it.
func GlobalTracer() Tracer {
return globalTracer
}
// StartSpan defers to `Tracer.StartSpan`. See `GlobalTracer()`.
func StartSpan(operationName string, opts ...StartSpanOption) Span {
return globalTracer.StartSpan(operationName, opts...)
}
// InitGlobalTracer is deprecated. Please use SetGlobalTracer.
func InitGlobalTracer(tracer Tracer) {
SetGlobalTracer(tracer)
}

54
vendor/github.com/opentracing/opentracing-go/gocontext.go generated vendored Normal file
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package opentracing
import "context"
type contextKey struct{}
var activeSpanKey = contextKey{}
// ContextWithSpan returns a new `context.Context` that holds a reference to
// `span`'s SpanContext.
func ContextWithSpan(ctx context.Context, span Span) context.Context {
return context.WithValue(ctx, activeSpanKey, span)
}
// SpanFromContext returns the `Span` previously associated with `ctx`, or
// `nil` if no such `Span` could be found.
//
// NOTE: context.Context != SpanContext: the former is Go's intra-process
// context propagation mechanism, and the latter houses OpenTracing's per-Span
// identity and baggage information.
func SpanFromContext(ctx context.Context) Span {
val := ctx.Value(activeSpanKey)
if sp, ok := val.(Span); ok {
return sp
}
return nil
}
// StartSpanFromContext starts and returns a Span with `operationName`, using
// any Span found within `ctx` as a ChildOfRef. If no such parent could be
// found, StartSpanFromContext creates a root (parentless) Span.
//
// The second return value is a context.Context object built around the
// returned Span.
//
// Example usage:
//
// SomeFunction(ctx context.Context, ...) {
// sp, ctx := opentracing.StartSpanFromContext(ctx, "SomeFunction")
// defer sp.Finish()
// ...
// }
func StartSpanFromContext(ctx context.Context, operationName string, opts ...StartSpanOption) (Span, context.Context) {
return startSpanFromContextWithTracer(ctx, GlobalTracer(), operationName, opts...)
}
// startSpanFromContextWithTracer is factored out for testing purposes.
func startSpanFromContextWithTracer(ctx context.Context, tracer Tracer, operationName string, opts ...StartSpanOption) (Span, context.Context) {
if parentSpan := SpanFromContext(ctx); parentSpan != nil {
opts = append(opts, ChildOf(parentSpan.Context()))
}
span := tracer.StartSpan(operationName, opts...)
return span, ContextWithSpan(ctx, span)
}

269
vendor/github.com/opentracing/opentracing-go/log/field.go generated vendored Normal file
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package log
import (
"fmt"
"math"
)
type fieldType int
const (
stringType fieldType = iota
boolType
intType
int32Type
uint32Type
int64Type
uint64Type
float32Type
float64Type
errorType
objectType
lazyLoggerType
noopType
)
// Field instances are constructed via LogBool, LogString, and so on.
// Tracing implementations may then handle them via the Field.Marshal
// method.
//
// "heavily influenced by" (i.e., partially stolen from)
// https://github.com/uber-go/zap
type Field struct {
key string
fieldType fieldType
numericVal int64
stringVal string
interfaceVal interface{}
}
// String adds a string-valued key:value pair to a Span.LogFields() record
func String(key, val string) Field {
return Field{
key: key,
fieldType: stringType,
stringVal: val,
}
}
// Bool adds a bool-valued key:value pair to a Span.LogFields() record
func Bool(key string, val bool) Field {
var numericVal int64
if val {
numericVal = 1
}
return Field{
key: key,
fieldType: boolType,
numericVal: numericVal,
}
}
// Int adds an int-valued key:value pair to a Span.LogFields() record
func Int(key string, val int) Field {
return Field{
key: key,
fieldType: intType,
numericVal: int64(val),
}
}
// Int32 adds an int32-valued key:value pair to a Span.LogFields() record
func Int32(key string, val int32) Field {
return Field{
key: key,
fieldType: int32Type,
numericVal: int64(val),
}
}
// Int64 adds an int64-valued key:value pair to a Span.LogFields() record
func Int64(key string, val int64) Field {
return Field{
key: key,
fieldType: int64Type,
numericVal: val,
}
}
// Uint32 adds a uint32-valued key:value pair to a Span.LogFields() record
func Uint32(key string, val uint32) Field {
return Field{
key: key,
fieldType: uint32Type,
numericVal: int64(val),
}
}
// Uint64 adds a uint64-valued key:value pair to a Span.LogFields() record
func Uint64(key string, val uint64) Field {
return Field{
key: key,
fieldType: uint64Type,
numericVal: int64(val),
}
}
// Float32 adds a float32-valued key:value pair to a Span.LogFields() record
func Float32(key string, val float32) Field {
return Field{
key: key,
fieldType: float32Type,
numericVal: int64(math.Float32bits(val)),
}
}
// Float64 adds a float64-valued key:value pair to a Span.LogFields() record
func Float64(key string, val float64) Field {
return Field{
key: key,
fieldType: float64Type,
numericVal: int64(math.Float64bits(val)),
}
}
// Error adds an error with the key "error" to a Span.LogFields() record
func Error(err error) Field {
return Field{
key: "error",
fieldType: errorType,
interfaceVal: err,
}
}
// Object adds an object-valued key:value pair to a Span.LogFields() record
func Object(key string, obj interface{}) Field {
return Field{
key: key,
fieldType: objectType,
interfaceVal: obj,
}
}
// LazyLogger allows for user-defined, late-bound logging of arbitrary data
type LazyLogger func(fv Encoder)
// Lazy adds a LazyLogger to a Span.LogFields() record; the tracing
// implementation will call the LazyLogger function at an indefinite time in
// the future (after Lazy() returns).
func Lazy(ll LazyLogger) Field {
return Field{
fieldType: lazyLoggerType,
interfaceVal: ll,
}
}
// Noop creates a no-op log field that should be ignored by the tracer.
// It can be used to capture optional fields, for example those that should
// only be logged in non-production environment:
//
// func customerField(order *Order) log.Field {
// if os.Getenv("ENVIRONMENT") == "dev" {
// return log.String("customer", order.Customer.ID)
// }
// return log.Noop()
// }
//
// span.LogFields(log.String("event", "purchase"), customerField(order))
//
func Noop() Field {
return Field{
fieldType: noopType,
}
}
// Encoder allows access to the contents of a Field (via a call to
// Field.Marshal).
//
// Tracer implementations typically provide an implementation of Encoder;
// OpenTracing callers typically do not need to concern themselves with it.
type Encoder interface {
EmitString(key, value string)
EmitBool(key string, value bool)
EmitInt(key string, value int)
EmitInt32(key string, value int32)
EmitInt64(key string, value int64)
EmitUint32(key string, value uint32)
EmitUint64(key string, value uint64)
EmitFloat32(key string, value float32)
EmitFloat64(key string, value float64)
EmitObject(key string, value interface{})
EmitLazyLogger(value LazyLogger)
}
// Marshal passes a Field instance through to the appropriate
// field-type-specific method of an Encoder.
func (lf Field) Marshal(visitor Encoder) {
switch lf.fieldType {
case stringType:
visitor.EmitString(lf.key, lf.stringVal)
case boolType:
visitor.EmitBool(lf.key, lf.numericVal != 0)
case intType:
visitor.EmitInt(lf.key, int(lf.numericVal))
case int32Type:
visitor.EmitInt32(lf.key, int32(lf.numericVal))
case int64Type:
visitor.EmitInt64(lf.key, int64(lf.numericVal))
case uint32Type:
visitor.EmitUint32(lf.key, uint32(lf.numericVal))
case uint64Type:
visitor.EmitUint64(lf.key, uint64(lf.numericVal))
case float32Type:
visitor.EmitFloat32(lf.key, math.Float32frombits(uint32(lf.numericVal)))
case float64Type:
visitor.EmitFloat64(lf.key, math.Float64frombits(uint64(lf.numericVal)))
case errorType:
if err, ok := lf.interfaceVal.(error); ok {
visitor.EmitString(lf.key, err.Error())
} else {
visitor.EmitString(lf.key, "<nil>")
}
case objectType:
visitor.EmitObject(lf.key, lf.interfaceVal)
case lazyLoggerType:
visitor.EmitLazyLogger(lf.interfaceVal.(LazyLogger))
case noopType:
// intentionally left blank
}
}
// Key returns the field's key.
func (lf Field) Key() string {
return lf.key
}
// Value returns the field's value as interface{}.
func (lf Field) Value() interface{} {
switch lf.fieldType {
case stringType:
return lf.stringVal
case boolType:
return lf.numericVal != 0
case intType:
return int(lf.numericVal)
case int32Type:
return int32(lf.numericVal)
case int64Type:
return int64(lf.numericVal)
case uint32Type:
return uint32(lf.numericVal)
case uint64Type:
return uint64(lf.numericVal)
case float32Type:
return math.Float32frombits(uint32(lf.numericVal))
case float64Type:
return math.Float64frombits(uint64(lf.numericVal))
case errorType, objectType, lazyLoggerType:
return lf.interfaceVal
case noopType:
return nil
default:
return nil
}
}
// String returns a string representation of the key and value.
func (lf Field) String() string {
return fmt.Sprint(lf.key, ":", lf.Value())
}

54
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package log
import "fmt"
// InterleavedKVToFields converts keyValues a la Span.LogKV() to a Field slice
// a la Span.LogFields().
func InterleavedKVToFields(keyValues ...interface{}) ([]Field, error) {
if len(keyValues)%2 != 0 {
return nil, fmt.Errorf("non-even keyValues len: %d", len(keyValues))
}
fields := make([]Field, len(keyValues)/2)
for i := 0; i*2 < len(keyValues); i++ {
key, ok := keyValues[i*2].(string)
if !ok {
return nil, fmt.Errorf(
"non-string key (pair #%d): %T",
i, keyValues[i*2])
}
switch typedVal := keyValues[i*2+1].(type) {
case bool:
fields[i] = Bool(key, typedVal)
case string:
fields[i] = String(key, typedVal)
case int:
fields[i] = Int(key, typedVal)
case int8:
fields[i] = Int32(key, int32(typedVal))
case int16:
fields[i] = Int32(key, int32(typedVal))
case int32:
fields[i] = Int32(key, typedVal)
case int64:
fields[i] = Int64(key, typedVal)
case uint:
fields[i] = Uint64(key, uint64(typedVal))
case uint64:
fields[i] = Uint64(key, typedVal)
case uint8:
fields[i] = Uint32(key, uint32(typedVal))
case uint16:
fields[i] = Uint32(key, uint32(typedVal))
case uint32:
fields[i] = Uint32(key, typedVal)
case float32:
fields[i] = Float32(key, typedVal)
case float64:
fields[i] = Float64(key, typedVal)
default:
// When in doubt, coerce to a string
fields[i] = String(key, fmt.Sprint(typedVal))
}
}
return fields, nil
}

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package opentracing
import "github.com/opentracing/opentracing-go/log"
// A NoopTracer is a trivial, minimum overhead implementation of Tracer
// for which all operations are no-ops.
//
// The primary use of this implementation is in libraries, such as RPC
// frameworks, that make tracing an optional feature controlled by the
// end user. A no-op implementation allows said libraries to use it
// as the default Tracer and to write instrumentation that does
// not need to keep checking if the tracer instance is nil.
//
// For the same reason, the NoopTracer is the default "global" tracer
// (see GlobalTracer and SetGlobalTracer functions).
//
// WARNING: NoopTracer does not support baggage propagation.
type NoopTracer struct{}
type noopSpan struct{}
type noopSpanContext struct{}
var (
defaultNoopSpanContext = noopSpanContext{}
defaultNoopSpan = noopSpan{}
defaultNoopTracer = NoopTracer{}
)
const (
emptyString = ""
)
// noopSpanContext:
func (n noopSpanContext) ForeachBaggageItem(handler func(k, v string) bool) {}
// noopSpan:
func (n noopSpan) Context() SpanContext { return defaultNoopSpanContext }
func (n noopSpan) SetBaggageItem(key, val string) Span { return defaultNoopSpan }
func (n noopSpan) BaggageItem(key string) string { return emptyString }
func (n noopSpan) SetTag(key string, value interface{}) Span { return n }
func (n noopSpan) LogFields(fields ...log.Field) {}
func (n noopSpan) LogKV(keyVals ...interface{}) {}
func (n noopSpan) Finish() {}
func (n noopSpan) FinishWithOptions(opts FinishOptions) {}
func (n noopSpan) SetOperationName(operationName string) Span { return n }
func (n noopSpan) Tracer() Tracer { return defaultNoopTracer }
func (n noopSpan) LogEvent(event string) {}
func (n noopSpan) LogEventWithPayload(event string, payload interface{}) {}
func (n noopSpan) Log(data LogData) {}
// StartSpan belongs to the Tracer interface.
func (n NoopTracer) StartSpan(operationName string, opts ...StartSpanOption) Span {
return defaultNoopSpan
}
// Inject belongs to the Tracer interface.
func (n NoopTracer) Inject(sp SpanContext, format interface{}, carrier interface{}) error {
return nil
}
// Extract belongs to the Tracer interface.
func (n NoopTracer) Extract(format interface{}, carrier interface{}) (SpanContext, error) {
return nil, ErrSpanContextNotFound
}

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package opentracing
import (
"errors"
"net/http"
)
///////////////////////////////////////////////////////////////////////////////
// CORE PROPAGATION INTERFACES:
///////////////////////////////////////////////////////////////////////////////
var (
// ErrUnsupportedFormat occurs when the `format` passed to Tracer.Inject() or
// Tracer.Extract() is not recognized by the Tracer implementation.
ErrUnsupportedFormat = errors.New("opentracing: Unknown or unsupported Inject/Extract format")
// ErrSpanContextNotFound occurs when the `carrier` passed to
// Tracer.Extract() is valid and uncorrupted but has insufficient
// information to extract a SpanContext.
ErrSpanContextNotFound = errors.New("opentracing: SpanContext not found in Extract carrier")
// ErrInvalidSpanContext errors occur when Tracer.Inject() is asked to
// operate on a SpanContext which it is not prepared to handle (for
// example, since it was created by a different tracer implementation).
ErrInvalidSpanContext = errors.New("opentracing: SpanContext type incompatible with tracer")
// ErrInvalidCarrier errors occur when Tracer.Inject() or Tracer.Extract()
// implementations expect a different type of `carrier` than they are
// given.
ErrInvalidCarrier = errors.New("opentracing: Invalid Inject/Extract carrier")
// ErrSpanContextCorrupted occurs when the `carrier` passed to
// Tracer.Extract() is of the expected type but is corrupted.
ErrSpanContextCorrupted = errors.New("opentracing: SpanContext data corrupted in Extract carrier")
)
///////////////////////////////////////////////////////////////////////////////
// BUILTIN PROPAGATION FORMATS:
///////////////////////////////////////////////////////////////////////////////
// BuiltinFormat is used to demarcate the values within package `opentracing`
// that are intended for use with the Tracer.Inject() and Tracer.Extract()
// methods.
type BuiltinFormat byte
const (
// Binary represents SpanContexts as opaque binary data.
//
// For Tracer.Inject(): the carrier must be an `io.Writer`.
//
// For Tracer.Extract(): the carrier must be an `io.Reader`.
Binary BuiltinFormat = iota
// TextMap represents SpanContexts as key:value string pairs.
//
// Unlike HTTPHeaders, the TextMap format does not restrict the key or
// value character sets in any way.
//
// For Tracer.Inject(): the carrier must be a `TextMapWriter`.
//
// For Tracer.Extract(): the carrier must be a `TextMapReader`.
TextMap
// HTTPHeaders represents SpanContexts as HTTP header string pairs.
//
// Unlike TextMap, the HTTPHeaders format requires that the keys and values
// be valid as HTTP headers as-is (i.e., character casing may be unstable
// and special characters are disallowed in keys, values should be
// URL-escaped, etc).
//
// For Tracer.Inject(): the carrier must be a `TextMapWriter`.
//
// For Tracer.Extract(): the carrier must be a `TextMapReader`.
//
// See HTTPHeadersCarrier for an implementation of both TextMapWriter
// and TextMapReader that defers to an http.Header instance for storage.
// For example, Inject():
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// err := span.Tracer().Inject(
// span.Context(), opentracing.HTTPHeaders, carrier)
//
// Or Extract():
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// clientContext, err := tracer.Extract(
// opentracing.HTTPHeaders, carrier)
//
HTTPHeaders
)
// TextMapWriter is the Inject() carrier for the TextMap builtin format. With
// it, the caller can encode a SpanContext for propagation as entries in a map
// of unicode strings.
type TextMapWriter interface {
// Set a key:value pair to the carrier. Multiple calls to Set() for the
// same key leads to undefined behavior.
//
// NOTE: The backing store for the TextMapWriter may contain data unrelated
// to SpanContext. As such, Inject() and Extract() implementations that
// call the TextMapWriter and TextMapReader interfaces must agree on a
// prefix or other convention to distinguish their own key:value pairs.
Set(key, val string)
}
// TextMapReader is the Extract() carrier for the TextMap builtin format. With it,
// the caller can decode a propagated SpanContext as entries in a map of
// unicode strings.
type TextMapReader interface {
// ForeachKey returns TextMap contents via repeated calls to the `handler`
// function. If any call to `handler` returns a non-nil error, ForeachKey
// terminates and returns that error.
//
// NOTE: The backing store for the TextMapReader may contain data unrelated
// to SpanContext. As such, Inject() and Extract() implementations that
// call the TextMapWriter and TextMapReader interfaces must agree on a
// prefix or other convention to distinguish their own key:value pairs.
//
// The "foreach" callback pattern reduces unnecessary copying in some cases
// and also allows implementations to hold locks while the map is read.
ForeachKey(handler func(key, val string) error) error
}
// TextMapCarrier allows the use of regular map[string]string
// as both TextMapWriter and TextMapReader.
type TextMapCarrier map[string]string
// ForeachKey conforms to the TextMapReader interface.
func (c TextMapCarrier) ForeachKey(handler func(key, val string) error) error {
for k, v := range c {
if err := handler(k, v); err != nil {
return err
}
}
return nil
}
// Set implements Set() of opentracing.TextMapWriter
func (c TextMapCarrier) Set(key, val string) {
c[key] = val
}
// HTTPHeadersCarrier satisfies both TextMapWriter and TextMapReader.
//
// Example usage for server side:
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// clientContext, err := tracer.Extract(opentracing.HTTPHeaders, carrier)
//
// Example usage for client side:
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// err := tracer.Inject(
// span.Context(),
// opentracing.HTTPHeaders,
// carrier)
//
type HTTPHeadersCarrier http.Header
// Set conforms to the TextMapWriter interface.
func (c HTTPHeadersCarrier) Set(key, val string) {
h := http.Header(c)
h.Add(key, val)
}
// ForeachKey conforms to the TextMapReader interface.
func (c HTTPHeadersCarrier) ForeachKey(handler func(key, val string) error) error {
for k, vals := range c {
for _, v := range vals {
if err := handler(k, v); err != nil {
return err
}
}
}
return nil
}

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vendor/github.com/opentracing/opentracing-go/span.go generated vendored Normal file
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package opentracing
import (
"time"
"github.com/opentracing/opentracing-go/log"
)
// SpanContext represents Span state that must propagate to descendant Spans and across process
// boundaries (e.g., a <trace_id, span_id, sampled> tuple).
type SpanContext interface {
// ForeachBaggageItem grants access to all baggage items stored in the
// SpanContext.
// The handler function will be called for each baggage key/value pair.
// The ordering of items is not guaranteed.
//
// The bool return value indicates if the handler wants to continue iterating
// through the rest of the baggage items; for example if the handler is trying to
// find some baggage item by pattern matching the name, it can return false
// as soon as the item is found to stop further iterations.
ForeachBaggageItem(handler func(k, v string) bool)
}
// Span represents an active, un-finished span in the OpenTracing system.
//
// Spans are created by the Tracer interface.
type Span interface {
// Sets the end timestamp and finalizes Span state.
//
// With the exception of calls to Context() (which are always allowed),
// Finish() must be the last call made to any span instance, and to do
// otherwise leads to undefined behavior.
Finish()
// FinishWithOptions is like Finish() but with explicit control over
// timestamps and log data.
FinishWithOptions(opts FinishOptions)
// Context() yields the SpanContext for this Span. Note that the return
// value of Context() is still valid after a call to Span.Finish(), as is
// a call to Span.Context() after a call to Span.Finish().
Context() SpanContext
// Sets or changes the operation name.
//
// Returns a reference to this Span for chaining.
SetOperationName(operationName string) Span
// Adds a tag to the span.
//
// If there is a pre-existing tag set for `key`, it is overwritten.
//
// Tag values can be numeric types, strings, or bools. The behavior of
// other tag value types is undefined at the OpenTracing level. If a
// tracing system does not know how to handle a particular value type, it
// may ignore the tag, but shall not panic.
//
// Returns a reference to this Span for chaining.
SetTag(key string, value interface{}) Span
// LogFields is an efficient and type-checked way to record key:value
// logging data about a Span, though the programming interface is a little
// more verbose than LogKV(). Here's an example:
//
// span.LogFields(
// log.String("event", "soft error"),
// log.String("type", "cache timeout"),
// log.Int("waited.millis", 1500))
//
// Also see Span.FinishWithOptions() and FinishOptions.BulkLogData.
LogFields(fields ...log.Field)
// LogKV is a concise, readable way to record key:value logging data about
// a Span, though unfortunately this also makes it less efficient and less
// type-safe than LogFields(). Here's an example:
//
// span.LogKV(
// "event", "soft error",
// "type", "cache timeout",
// "waited.millis", 1500)
//
// For LogKV (as opposed to LogFields()), the parameters must appear as
// key-value pairs, like
//
// span.LogKV(key1, val1, key2, val2, key3, val3, ...)
//
// The keys must all be strings. The values may be strings, numeric types,
// bools, Go error instances, or arbitrary structs.
//
// (Note to implementors: consider the log.InterleavedKVToFields() helper)
LogKV(alternatingKeyValues ...interface{})
// SetBaggageItem sets a key:value pair on this Span and its SpanContext
// that also propagates to descendants of this Span.
//
// SetBaggageItem() enables powerful functionality given a full-stack
// opentracing integration (e.g., arbitrary application data from a mobile
// app can make it, transparently, all the way into the depths of a storage
// system), and with it some powerful costs: use this feature with care.
//
// IMPORTANT NOTE #1: SetBaggageItem() will only propagate baggage items to
// *future* causal descendants of the associated Span.
//
// IMPORTANT NOTE #2: Use this thoughtfully and with care. Every key and
// value is copied into every local *and remote* child of the associated
// Span, and that can add up to a lot of network and cpu overhead.
//
// Returns a reference to this Span for chaining.
SetBaggageItem(restrictedKey, value string) Span
// Gets the value for a baggage item given its key. Returns the empty string
// if the value isn't found in this Span.
BaggageItem(restrictedKey string) string
// Provides access to the Tracer that created this Span.
Tracer() Tracer
// Deprecated: use LogFields or LogKV
LogEvent(event string)
// Deprecated: use LogFields or LogKV
LogEventWithPayload(event string, payload interface{})
// Deprecated: use LogFields or LogKV
Log(data LogData)
}
// LogRecord is data associated with a single Span log. Every LogRecord
// instance must specify at least one Field.
type LogRecord struct {
Timestamp time.Time
Fields []log.Field
}
// FinishOptions allows Span.FinishWithOptions callers to override the finish
// timestamp and provide log data via a bulk interface.
type FinishOptions struct {
// FinishTime overrides the Span's finish time, or implicitly becomes
// time.Now() if FinishTime.IsZero().
//
// FinishTime must resolve to a timestamp that's >= the Span's StartTime
// (per StartSpanOptions).
FinishTime time.Time
// LogRecords allows the caller to specify the contents of many LogFields()
// calls with a single slice. May be nil.
//
// None of the LogRecord.Timestamp values may be .IsZero() (i.e., they must
// be set explicitly). Also, they must be >= the Span's start timestamp and
// <= the FinishTime (or time.Now() if FinishTime.IsZero()). Otherwise the
// behavior of FinishWithOptions() is undefined.
//
// If specified, the caller hands off ownership of LogRecords at
// FinishWithOptions() invocation time.
//
// If specified, the (deprecated) BulkLogData must be nil or empty.
LogRecords []LogRecord
// BulkLogData is DEPRECATED.
BulkLogData []LogData
}
// LogData is DEPRECATED
type LogData struct {
Timestamp time.Time
Event string
Payload interface{}
}
// ToLogRecord converts a deprecated LogData to a non-deprecated LogRecord
func (ld *LogData) ToLogRecord() LogRecord {
var literalTimestamp time.Time
if ld.Timestamp.IsZero() {
literalTimestamp = time.Now()
} else {
literalTimestamp = ld.Timestamp
}
rval := LogRecord{
Timestamp: literalTimestamp,
}
if ld.Payload == nil {
rval.Fields = []log.Field{
log.String("event", ld.Event),
}
} else {
rval.Fields = []log.Field{
log.String("event", ld.Event),
log.Object("payload", ld.Payload),
}
}
return rval
}

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package opentracing
import "time"
// Tracer is a simple, thin interface for Span creation and SpanContext
// propagation.
type Tracer interface {
// Create, start, and return a new Span with the given `operationName` and
// incorporate the given StartSpanOption `opts`. (Note that `opts` borrows
// from the "functional options" pattern, per
// http://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis)
//
// A Span with no SpanReference options (e.g., opentracing.ChildOf() or
// opentracing.FollowsFrom()) becomes the root of its own trace.
//
// Examples:
//
// var tracer opentracing.Tracer = ...
//
// // The root-span case:
// sp := tracer.StartSpan("GetFeed")
//
// // The vanilla child span case:
// sp := tracer.StartSpan(
// "GetFeed",
// opentracing.ChildOf(parentSpan.Context()))
//
// // All the bells and whistles:
// sp := tracer.StartSpan(
// "GetFeed",
// opentracing.ChildOf(parentSpan.Context()),
// opentracing.Tag{"user_agent", loggedReq.UserAgent},
// opentracing.StartTime(loggedReq.Timestamp),
// )
//
StartSpan(operationName string, opts ...StartSpanOption) Span
// Inject() takes the `sm` SpanContext instance and injects it for
// propagation within `carrier`. The actual type of `carrier` depends on
// the value of `format`.
//
// OpenTracing defines a common set of `format` values (see BuiltinFormat),
// and each has an expected carrier type.
//
// Other packages may declare their own `format` values, much like the keys
// used by `context.Context` (see
// https://godoc.org/golang.org/x/net/context#WithValue).
//
// Example usage (sans error handling):
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// err := tracer.Inject(
// span.Context(),
// opentracing.HTTPHeaders,
// carrier)
//
// NOTE: All opentracing.Tracer implementations MUST support all
// BuiltinFormats.
//
// Implementations may return opentracing.ErrUnsupportedFormat if `format`
// is not supported by (or not known by) the implementation.
//
// Implementations may return opentracing.ErrInvalidCarrier or any other
// implementation-specific error if the format is supported but injection
// fails anyway.
//
// See Tracer.Extract().
Inject(sm SpanContext, format interface{}, carrier interface{}) error
// Extract() returns a SpanContext instance given `format` and `carrier`.
//
// OpenTracing defines a common set of `format` values (see BuiltinFormat),
// and each has an expected carrier type.
//
// Other packages may declare their own `format` values, much like the keys
// used by `context.Context` (see
// https://godoc.org/golang.org/x/net/context#WithValue).
//
// Example usage (with StartSpan):
//
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// clientContext, err := tracer.Extract(opentracing.HTTPHeaders, carrier)
//
// // ... assuming the ultimate goal here is to resume the trace with a
// // server-side Span:
// var serverSpan opentracing.Span
// if err == nil {
// span = tracer.StartSpan(
// rpcMethodName, ext.RPCServerOption(clientContext))
// } else {
// span = tracer.StartSpan(rpcMethodName)
// }
//
//
// NOTE: All opentracing.Tracer implementations MUST support all
// BuiltinFormats.
//
// Return values:
// - A successful Extract returns a SpanContext instance and a nil error
// - If there was simply no SpanContext to extract in `carrier`, Extract()
// returns (nil, opentracing.ErrSpanContextNotFound)
// - If `format` is unsupported or unrecognized, Extract() returns (nil,
// opentracing.ErrUnsupportedFormat)
// - If there are more fundamental problems with the `carrier` object,
// Extract() may return opentracing.ErrInvalidCarrier,
// opentracing.ErrSpanContextCorrupted, or implementation-specific
// errors.
//
// See Tracer.Inject().
Extract(format interface{}, carrier interface{}) (SpanContext, error)
}
// StartSpanOptions allows Tracer.StartSpan() callers and implementors a
// mechanism to override the start timestamp, specify Span References, and make
// a single Tag or multiple Tags available at Span start time.
//
// StartSpan() callers should look at the StartSpanOption interface and
// implementations available in this package.
//
// Tracer implementations can convert a slice of `StartSpanOption` instances
// into a `StartSpanOptions` struct like so:
//
// func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
// sso := opentracing.StartSpanOptions{}
// for _, o := range opts {
// o.Apply(&sso)
// }
// ...
// }
//
type StartSpanOptions struct {
// Zero or more causal references to other Spans (via their SpanContext).
// If empty, start a "root" Span (i.e., start a new trace).
References []SpanReference
// StartTime overrides the Span's start time, or implicitly becomes
// time.Now() if StartTime.IsZero().
StartTime time.Time
// Tags may have zero or more entries; the restrictions on map values are
// identical to those for Span.SetTag(). May be nil.
//
// If specified, the caller hands off ownership of Tags at
// StartSpan() invocation time.
Tags map[string]interface{}
}
// StartSpanOption instances (zero or more) may be passed to Tracer.StartSpan.
//
// StartSpanOption borrows from the "functional options" pattern, per
// http://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis
type StartSpanOption interface {
Apply(*StartSpanOptions)
}
// SpanReferenceType is an enum type describing different categories of
// relationships between two Spans. If Span-2 refers to Span-1, the
// SpanReferenceType describes Span-1 from Span-2's perspective. For example,
// ChildOfRef means that Span-1 created Span-2.
//
// NOTE: Span-1 and Span-2 do *not* necessarily depend on each other for
// completion; e.g., Span-2 may be part of a background job enqueued by Span-1,
// or Span-2 may be sitting in a distributed queue behind Span-1.
type SpanReferenceType int
const (
// ChildOfRef refers to a parent Span that caused *and* somehow depends
// upon the new child Span. Often (but not always), the parent Span cannot
// finish until the child Span does.
//
// An timing diagram for a ChildOfRef that's blocked on the new Span:
//
// [-Parent Span---------]
// [-Child Span----]
//
// See http://opentracing.io/spec/
//
// See opentracing.ChildOf()
ChildOfRef SpanReferenceType = iota
// FollowsFromRef refers to a parent Span that does not depend in any way
// on the result of the new child Span. For instance, one might use
// FollowsFromRefs to describe pipeline stages separated by queues,
// or a fire-and-forget cache insert at the tail end of a web request.
//
// A FollowsFromRef Span is part of the same logical trace as the new Span:
// i.e., the new Span is somehow caused by the work of its FollowsFromRef.
//
// All of the following could be valid timing diagrams for children that
// "FollowFrom" a parent.
//
// [-Parent Span-] [-Child Span-]
//
//
// [-Parent Span--]
// [-Child Span-]
//
//
// [-Parent Span-]
// [-Child Span-]
//
// See http://opentracing.io/spec/
//
// See opentracing.FollowsFrom()
FollowsFromRef
)
// SpanReference is a StartSpanOption that pairs a SpanReferenceType and a
// referenced SpanContext. See the SpanReferenceType documentation for
// supported relationships. If SpanReference is created with
// ReferencedContext==nil, it has no effect. Thus it allows for a more concise
// syntax for starting spans:
//
// sc, _ := tracer.Extract(someFormat, someCarrier)
// span := tracer.StartSpan("operation", opentracing.ChildOf(sc))
//
// The `ChildOf(sc)` option above will not panic if sc == nil, it will just
// not add the parent span reference to the options.
type SpanReference struct {
Type SpanReferenceType
ReferencedContext SpanContext
}
// Apply satisfies the StartSpanOption interface.
func (r SpanReference) Apply(o *StartSpanOptions) {
if r.ReferencedContext != nil {
o.References = append(o.References, r)
}
}
// ChildOf returns a StartSpanOption pointing to a dependent parent span.
// If sc == nil, the option has no effect.
//
// See ChildOfRef, SpanReference
func ChildOf(sc SpanContext) SpanReference {
return SpanReference{
Type: ChildOfRef,
ReferencedContext: sc,
}
}
// FollowsFrom returns a StartSpanOption pointing to a parent Span that caused
// the child Span but does not directly depend on its result in any way.
// If sc == nil, the option has no effect.
//
// See FollowsFromRef, SpanReference
func FollowsFrom(sc SpanContext) SpanReference {
return SpanReference{
Type: FollowsFromRef,
ReferencedContext: sc,
}
}
// StartTime is a StartSpanOption that sets an explicit start timestamp for the
// new Span.
type StartTime time.Time
// Apply satisfies the StartSpanOption interface.
func (t StartTime) Apply(o *StartSpanOptions) {
o.StartTime = time.Time(t)
}
// Tags are a generic map from an arbitrary string key to an opaque value type.
// The underlying tracing system is responsible for interpreting and
// serializing the values.
type Tags map[string]interface{}
// Apply satisfies the StartSpanOption interface.
func (t Tags) Apply(o *StartSpanOptions) {
if o.Tags == nil {
o.Tags = make(map[string]interface{})
}
for k, v := range t {
o.Tags[k] = v
}
}
// Tag may be passed as a StartSpanOption to add a tag to new spans,
// or its Set method may be used to apply the tag to an existing Span,
// for example:
//
// tracer.StartSpan("opName", Tag{"Key", value})
//
// or
//
// Tag{"key", value}.Set(span)
type Tag struct {
Key string
Value interface{}
}
// Apply satisfies the StartSpanOption interface.
func (t Tag) Apply(o *StartSpanOptions) {
if o.Tags == nil {
o.Tags = make(map[string]interface{})
}
o.Tags[t.Key] = t.Value
}
// Set applies the tag to an existing Span.
func (t Tag) Set(s Span) {
s.SetTag(t.Key, t.Value)
}

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Changes by Version
==================
2.15.0 (unreleased)
-------------------
- nothing yet
2.14.0 (2018-04-30)
-------------------
- Support throttling for debug traces (#274) <Isaac Hier>
- Remove dependency on Apache Thrift (#303) <Yuri Shkuro>
- Remove dependency on tchannel (#295) (#294) <Yuri Shkuro>
- Test with Go 1.9 (#298) <Yuri Shkuro>
2.13.0 (2018-04-15)
-------------------
- Use value receiver for config.NewTracer() (#283) <Yuri Shkuro>
- Lock span during jaeger thrift conversion (#273) <Won Jun Jang>
- Fix the RemotelyControlledSampler so that it terminates go-routine on Close() (#260) <Scott Kidder> <Yuri Shkuro>
- Added support for client configuration via env vars (#275) <Juraci Paixão Kröhling>
- Allow overriding sampler in the Config (#270) <Mike Kabischev>
2.12.0 (2018-03-14)
-------------------
- Use lock when retrieving span.Context() (#268)
- Add Configuration support for custom Injector and Extractor (#263) <Martin Liu>
2.11.2 (2018-01-12)
-------------------
- Add Gopkg.toml to allow using the lib with `dep`
2.11.1 (2018-01-03)
-------------------
- Do not enqueue spans after Reporter is closed (#235, #245)
- Change default flush interval to 1sec (#243)
2.11.0 (2017-11-27)
-------------------
- Normalize metric names and tags to be compatible with Prometheus (#222)
2.10.0 (2017-11-14)
-------------------
- Support custom tracing headers (#176)
- Add BaggageRestrictionManager (#178) and RemoteBaggageRestrictionManager (#182)
- Do not coerce baggage keys to lower case (#196)
- Log span name when span cannot be reported (#198)
- Add option to enable gen128Bit for tracer (#193) and allow custom generator for high bits of trace ID (#219)
2.9.0 (2017-07-29)
------------------
- Pin thrift <= 0.10 (#179)
- Introduce a parallel interface ContribObserver (#159)
2.8.0 (2017-07-05)
------------------
- Drop `jaeger.` prefix from `jaeger.hostname` process-level tag
- Add options to set tracer tags
2.7.0 (2017-06-21)
------------------
- Fix rate limiter balance [#135](https://github.com/uber/jaeger-client-go/pull/135) [#140](https://github.com/uber/jaeger-client-go/pull/140)
- Default client to send Jaeger.thrift [#147](https://github.com/uber/jaeger-client-go/pull/147)
- Save baggage in span [#153](https://github.com/uber/jaeger-client-go/pull/153)
- Move reporter.queueLength to the top of the struct to guarantee 64bit alignment [#158](https://github.com/uber/jaeger-client-go/pull/158)
- Support HTTP transport with jaeger.thrift [#161](https://github.com/uber/jaeger-client-go/pull/161)
2.6.0 (2017-03-28)
------------------
- Add config option to initialize RPC Metrics feature
2.5.0 (2017-03-23)
------------------
- Split request latency metric by success/failure [#123](https://github.com/uber/jaeger-client-go/pull/123)
- Add mutex to adaptive sampler and fix race condition [#124](https://github.com/uber/jaeger-client-go/pull/124)
- Fix rate limiter panic [#125](https://github.com/uber/jaeger-client-go/pull/125)
2.4.0 (2017-03-21)
------------------
- Remove `_ms` suffix from request latency metric name [#121](https://github.com/uber/jaeger-client-go/pull/121)
- Rename all metrics to "request" and "http_request" and use tags for other dimensions [#121](https://github.com/uber/jaeger-client-go/pull/121)
2.3.0 (2017-03-20)
------------------
- Make Span type public to allow access to non-std methods for testing [#117](https://github.com/uber/jaeger-client-go/pull/117)
- Add a structured way to extract traces for logging with zap [#118](https://github.com/uber/jaeger-client-go/pull/118)
2.2.1 (2017-03-14)
------------------
- Fix panic caused by updating the remote sampler from adaptive sampler to any other sampler type (https://github.com/uber/jaeger-client-go/pull/111)
2.2.0 (2017-03-10)
------------------
- Introduce Observer and SpanObserver (https://github.com/uber/jaeger-client-go/pull/94)
- Add RPC metrics emitter as Observer/SpanObserver (https://github.com/uber/jaeger-client-go/pull/103)
2.1.2 (2017-02-27)
-------------------
- Fix leaky bucket bug (https://github.com/uber/jaeger-client-go/pull/99)
- Fix zap logger Infof (https://github.com/uber/jaeger-client-go/pull/100)
- Add tracer initialization godoc examples
2.1.1 (2017-02-21)
-------------------
- Fix inefficient usage of zap.Logger
2.1.0 (2017-02-17)
-------------------
- Add adapter for zap.Logger (https://github.com/uber-go/zap)
- Move logging API to ./log/ package
2.0.0 (2017-02-08)
-------------------
- Support Adaptive Sampling
- Support 128bit Trace IDs
- Change trace/span IDs from uint64 to strong types TraceID and SpanID
- Add Zipkin HTTP B3 Propagation format support #72
- Rip out existing metrics and use github.com/uber/jaeger-lib/metrics
- Change API for tracer, reporter, sampler initialization
1.6.0 (2016-10-14)
-------------------
- Add Zipkin HTTP transport
- Support external baggage via jaeger-baggage header
- Unpin Thrift version, keep to master
1.5.1 (2016-09-27)
-------------------
- Relax dependency on opentracing to ^1
1.5.0 (2016-09-27)
-------------------
- Upgrade to opentracing-go 1.0
- Support KV logging for Spans
1.4.0 (2016-09-14)
-------------------
- Support debug traces via HTTP header "jaeger-debug-id"

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# How to Contribute to Jaeger
We'd love your help!
Jaeger is [Apache 2.0 licensed](LICENSE) and accepts contributions via GitHub
pull requests. This document outlines some of the conventions on development
workflow, commit message formatting, contact points and other resources to make
it easier to get your contribution accepted.
We gratefully welcome improvements to documentation as well as to code.
# Certificate of Origin
By contributing to this project you agree to the [Developer Certificate of
Origin](https://developercertificate.org/) (DCO). This document was created
by the Linux Kernel community and is a simple statement that you, as a
contributor, have the legal right to make the contribution. See the [DCO](DCO)
file for details.
## Getting Started
This library uses [glide](https://github.com/Masterminds/glide) to manage dependencies.
To get started, make sure you clone the Git repository into the correct location
`github.com/uber/jaeger-client-go` relative to `$GOPATH`:
```
mkdir -p $GOPATH/src/github.com/uber
cd $GOPATH/src/github.com/uber
git clone git@github.com:jaegertracing/jaeger-client-go.git jaeger-client-go
cd jaeger-client-go
```
Then install dependencies and run the tests:
```
git submodule update --init --recursive
glide install
make test
```
## Imports grouping
This projects follows the following pattern for grouping imports in Go files:
* imports from standard library
* imports from other projects
* imports from `jaeger-client-go` project
For example:
```go
import (
"fmt"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"github.com/uber/jaeger-client-go/config"
)
```
## Making A Change
*Before making any significant changes, please [open an
issue](https://github.com/jaegertracing/jaeger-client-go/issues).* Discussing your proposed
changes ahead of time will make the contribution process smooth for everyone.
Once we've discussed your changes and you've got your code ready, make sure
that tests are passing (`make test` or `make cover`) and open your PR. Your
pull request is most likely to be accepted if it:
* Includes tests for new functionality.
* Follows the guidelines in [Effective
Go](https://golang.org/doc/effective_go.html) and the [Go team's common code
review comments](https://github.com/golang/go/wiki/CodeReviewComments).
* Has a [good commit message](https://chris.beams.io/posts/git-commit/):
* Separate subject from body with a blank line
* Limit the subject line to 50 characters
* Capitalize the subject line
* Do not end the subject line with a period
* Use the imperative mood in the subject line
* Wrap the body at 72 characters
* Use the body to explain _what_ and _why_ instead of _how_
* Each commit must be signed by the author ([see below](#sign-your-work)).
## License
By contributing your code, you agree to license your contribution under the terms
of the [Apache License](LICENSE).
If you are adding a new file it should have a header like below. The easiest
way to add such header is to run `make fmt`.
```
// Copyright (c) 2017 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
```
## Sign your work
The sign-off is a simple line at the end of the explanation for the
patch, which certifies that you wrote it or otherwise have the right to
pass it on as an open-source patch. The rules are pretty simple: if you
can certify the below (from
[developercertificate.org](http://developercertificate.org/)):
```
Developer Certificate of Origin
Version 1.1
Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
660 York Street, Suite 102,
San Francisco, CA 94110 USA
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
```
then you just add a line to every git commit message:
Signed-off-by: Joe Smith <joe@gmail.com>
using your real name (sorry, no pseudonyms or anonymous contributions.)
You can add the sign off when creating the git commit via `git commit -s`.
If you want this to be automatic you can set up some aliases:
```
git config --add alias.amend "commit -s --amend"
git config --add alias.c "commit -s"
```

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Developer Certificate of Origin
Version 1.1
Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
660 York Street, Suite 102,
San Francisco, CA 94110 USA
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.

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# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
[[projects]]
branch = "master"
name = "github.com/beorn7/perks"
packages = ["quantile"]
revision = "3a771d992973f24aa725d07868b467d1ddfceafb"
[[projects]]
branch = "master"
name = "github.com/codahale/hdrhistogram"
packages = ["."]
revision = "3a0bb77429bd3a61596f5e8a3172445844342120"
[[projects]]
branch = "master"
name = "github.com/crossdock/crossdock-go"
packages = [
".",
"assert",
"require"
]
revision = "049aabb0122b03bc9bd30cab8f3f91fb60166361"
[[projects]]
name = "github.com/davecgh/go-spew"
packages = ["spew"]
revision = "346938d642f2ec3594ed81d874461961cd0faa76"
version = "v1.1.0"
[[projects]]
name = "github.com/golang/protobuf"
packages = ["proto"]
revision = "925541529c1fa6821df4e44ce2723319eb2be768"
version = "v1.0.0"
[[projects]]
name = "github.com/matttproud/golang_protobuf_extensions"
packages = ["pbutil"]
revision = "3247c84500bff8d9fb6d579d800f20b3e091582c"
version = "v1.0.0"
[[projects]]
name = "github.com/opentracing/opentracing-go"
packages = [
".",
"ext",
"log"
]
revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
version = "v1.0.2"
[[projects]]
name = "github.com/pkg/errors"
packages = ["."]
revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
version = "v0.8.0"
[[projects]]
name = "github.com/pmezard/go-difflib"
packages = ["difflib"]
revision = "792786c7400a136282c1664665ae0a8db921c6c2"
version = "v1.0.0"
[[projects]]
name = "github.com/prometheus/client_golang"
packages = ["prometheus"]
revision = "c5b7fccd204277076155f10851dad72b76a49317"
version = "v0.8.0"
[[projects]]
branch = "master"
name = "github.com/prometheus/client_model"
packages = ["go"]
revision = "99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c"
[[projects]]
branch = "master"
name = "github.com/prometheus/common"
packages = [
"expfmt",
"internal/bitbucket.org/ww/goautoneg",
"model"
]
revision = "d811d2e9bf898806ecfb6ef6296774b13ffc314c"
[[projects]]
branch = "master"
name = "github.com/prometheus/procfs"
packages = [
".",
"internal/util",
"nfs",
"xfs"
]
revision = "8b1c2da0d56deffdbb9e48d4414b4e674bd8083e"
[[projects]]
name = "github.com/stretchr/testify"
packages = [
"assert",
"require",
"suite"
]
revision = "12b6f73e6084dad08a7c6e575284b177ecafbc71"
version = "v1.2.1"
[[projects]]
name = "github.com/uber-go/atomic"
packages = ["."]
revision = "8474b86a5a6f79c443ce4b2992817ff32cf208b8"
version = "v1.3.1"
[[projects]]
name = "github.com/uber/jaeger-lib"
packages = [
"metrics",
"metrics/prometheus",
"metrics/testutils"
]
revision = "4267858c0679cd4e47cefed8d7f70fd386cfb567"
version = "v1.4.0"
[[projects]]
name = "go.uber.org/atomic"
packages = ["."]
revision = "54f72d32435d760d5604f17a82e2435b28dc4ba5"
version = "v1.3.0"
[[projects]]
name = "go.uber.org/multierr"
packages = ["."]
revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
version = "v1.1.0"
[[projects]]
name = "go.uber.org/zap"
packages = [
".",
"buffer",
"internal/bufferpool",
"internal/color",
"internal/exit",
"zapcore"
]
revision = "eeedf312bc6c57391d84767a4cd413f02a917974"
version = "v1.8.0"
[[projects]]
branch = "master"
name = "golang.org/x/net"
packages = [
"context",
"context/ctxhttp"
]
revision = "5f9ae10d9af5b1c89ae6904293b14b064d4ada23"
[solve-meta]
analyzer-name = "dep"
analyzer-version = 1
inputs-digest = "f9dcfaf37a785c5dac1e20c29605eda29a83ba9c6f8842e92960dc94c8c4ff80"
solver-name = "gps-cdcl"
solver-version = 1

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[[constraint]]
name = "github.com/crossdock/crossdock-go"
branch = "master"
[[constraint]]
name = "github.com/opentracing/opentracing-go"
version = "^1"
[[constraint]]
name = "github.com/prometheus/client_golang"
version = "0.8.0"
[[constraint]]
name = "github.com/stretchr/testify"
version = "^1.1.3"
[[constraint]]
name = "github.com/uber-go/atomic"
version = "^1"
[[constraint]]
name = "github.com/uber/jaeger-lib"
version = "^1.3"
[[constraint]]
name = "go.uber.org/zap"
version = "^1"

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APPENDIX: How to apply the Apache License to your work.
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boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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PROJECT_ROOT=github.com/uber/jaeger-client-go
PACKAGES := $(shell glide novendor | grep -v -e ./thrift-gen/... -e ./thrift/...)
# all .go files that don't exist in hidden directories
ALL_SRC := $(shell find . -name "*.go" | grep -v -e vendor -e thrift-gen -e ./thrift/ \
-e ".*/\..*" \
-e ".*/_.*" \
-e ".*/mocks.*")
-include crossdock/rules.mk
export GO15VENDOREXPERIMENT=1
RACE=-race
GOTEST=go test -v $(RACE)
GOLINT=golint
GOVET=go vet
GOFMT=gofmt
FMT_LOG=fmt.log
LINT_LOG=lint.log
THRIFT_VER=0.9.3
THRIFT_IMG=thrift:$(THRIFT_VER)
THRIFT=docker run -v "${PWD}:/data" $(THRIFT_IMG) thrift
THRIFT_GO_ARGS=thrift_import="github.com/apache/thrift/lib/go/thrift"
THRIFT_GEN_DIR=thrift-gen
PASS=$(shell printf "\033[32mPASS\033[0m")
FAIL=$(shell printf "\033[31mFAIL\033[0m")
COLORIZE=sed ''/PASS/s//$(PASS)/'' | sed ''/FAIL/s//$(FAIL)/''
.DEFAULT_GOAL := test-and-lint
.PHONY: test-and-lint
test-and-lint: test fmt lint
.PHONY: test
test:
bash -c "set -e; set -o pipefail; $(GOTEST) $(PACKAGES) | $(COLORIZE)"
.PHONY: fmt
fmt:
$(GOFMT) -e -s -l -w $(ALL_SRC)
./scripts/updateLicenses.sh
.PHONY: lint
lint:
$(GOVET) $(PACKAGES)
@cat /dev/null > $(LINT_LOG)
@$(foreach pkg, $(PACKAGES), $(GOLINT) $(pkg) | grep -v crossdock/thrift >> $(LINT_LOG) || true;)
@[ ! -s "$(LINT_LOG)" ] || (echo "Lint Failures" | cat - $(LINT_LOG) && false)
@$(GOFMT) -e -s -l $(ALL_SRC) > $(FMT_LOG)
./scripts/updateLicenses.sh >> $(FMT_LOG)
@[ ! -s "$(FMT_LOG)" ] || (echo "go fmt or license check failures, run 'make fmt'" | cat - $(FMT_LOG) && false)
.PHONY: install
install:
glide --version || go get github.com/Masterminds/glide
ifeq ($(USE_DEP),true)
dep ensure
else
glide install
endif
.PHONY: cover
cover:
./scripts/cover.sh $(shell go list $(PACKAGES))
go tool cover -html=cover.out -o cover.html
# This is not part of the regular test target because we don't want to slow it
# down.
.PHONY: test-examples
test-examples:
make -C examples
# TODO at the moment we're not generating tchan_*.go files
thrift: idl-submodule thrift-image
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/agent.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/sampling.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/jaeger.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/zipkincore.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/baggage.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/crossdock/thrift/ /data/idl/thrift/crossdock/tracetest.thrift
sed -i '' 's|"zipkincore"|"$(PROJECT_ROOT)/thrift-gen/zipkincore"|g' $(THRIFT_GEN_DIR)/agent/*.go
sed -i '' 's|"jaeger"|"$(PROJECT_ROOT)/thrift-gen/jaeger"|g' $(THRIFT_GEN_DIR)/agent/*.go
sed -i '' 's|"github.com/apache/thrift/lib/go/thrift"|"github.com/uber/jaeger-client-go/thrift"|g' \
$(THRIFT_GEN_DIR)/*/*.go crossdock/thrift/tracetest/*.go
rm -rf thrift-gen/*/*-remote
rm -rf crossdock/thrift/*/*-remote
rm -rf thrift-gen/jaeger/collector.go
idl-submodule:
git submodule init
git submodule update
thrift-image:
$(THRIFT) -version
.PHONY: install-dep-ci
install-dep-ci:
- curl -L -s https://github.com/golang/dep/releases/download/v0.3.2/dep-linux-amd64 -o $$GOPATH/bin/dep
- chmod +x $$GOPATH/bin/dep
.PHONY: install-ci
install-ci: install-dep-ci install
go get github.com/wadey/gocovmerge
go get github.com/mattn/goveralls
go get golang.org/x/tools/cmd/cover
go get github.com/golang/lint/golint
.PHONY: test-ci
test-ci:
@./scripts/cover.sh $(shell go list $(PACKAGES))
make lint

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[![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov] [![OpenTracing 1.0 Enabled][ot-img]][ot-url]
# Jaeger Bindings for Go OpenTracing API
Instrumentation library that implements an
[OpenTracing](http://opentracing.io) Tracer for Jaeger (https://jaegertracing.io).
**IMPORTANT**: The library's import path is based on its original location under `github.com/uber`. Do not try to import it as `github.com/jaegertracing`, it will not compile. We might revisit this in the next major release.
* :white_check_mark: `import "github.com/uber/jaeger-client-go"`
* :x: `import "github.com/jaegertracing/jaeger-client-go"`
## How to Contribute
Please see [CONTRIBUTING.md](CONTRIBUTING.md).
## Installation
We recommended using a dependency manager like [glide](https://github.com/Masterminds/glide)
and [semantic versioning](http://semver.org/) when including this library into an application.
For example, Jaeger backend imports this library like this:
```yaml
- package: github.com/uber/jaeger-client-go
version: ^2.7.0
```
If you instead want to use the latest version in `master`, you can pull it via `go get`.
Note that during `go get` you may see build errors due to incompatible dependencies, which is why
we recommend using semantic versions for dependencies. The error may be fixed by running
`make install` (it will install `glide` if you don't have it):
```shell
go get -u github.com/uber/jaeger-client-go/
cd $GOPATH/src/github.com/uber/jaeger-client-go/
git submodule update --init --recursive
make install
```
## Initialization
See tracer initialization examples in [godoc](https://godoc.org/github.com/uber/jaeger-client-go/config#pkg-examples)
and [config/example_test.go](./config/example_test.go).
### Environment variables
The tracer can be initialized with values coming from environment variables. None of the env vars are required
and all of them can be overriden via direct setting of the property on the configuration object.
Property| Description
--- | ---
JAEGER_SERVICE_NAME | The service name
JAEGER_AGENT_HOST | The hostname for communicating with agent via UDP
JAEGER_AGENT_PORT | The port for communicating with agent via UDP
JAEGER_REPORTER_LOG_SPANS | Whether the reporter should also log the spans
JAEGER_REPORTER_MAX_QUEUE_SIZE | The reporter's maximum queue size
JAEGER_REPORTER_FLUSH_INTERVAL | The reporter's flush interval (ms)
JAEGER_SAMPLER_TYPE | The sampler type
JAEGER_SAMPLER_PARAM | The sampler parameter (number)
JAEGER_SAMPLER_MANAGER_HOST_PORT | The host name and port when using the remote controlled sampler
JAEGER_SAMPLER_MAX_OPERATIONS | The maximum number of operations that the sampler will keep track of
JAEGER_SAMPLER_REFRESH_INTERVAL | How often the remotely controlled sampler will poll jaeger-agent for the appropriate sampling strategy
JAEGER_TAGS | A comma separated list of `name = value` tracer level tags, which get added to all reported spans. The value can also refer to an environment variable using the format `${envVarName:default}`, where the `:default` is optional, and identifies a value to be used if the environment variable cannot be found
JAEGER_DISABLED | Whether the tracer is disabled or not. If true, the default `opentracing.NoopTracer` is used.
JAEGER_RPC_METRICS | Whether to store RPC metrics
### Closing the tracer via `io.Closer`
The constructor function for Jaeger Tracer returns the tracer itself and an `io.Closer` instance.
It is recommended to structure your `main()` so that it calls the `Close()` function on the closer
before exiting, e.g.
```go
tracer, closer, err := cfg.NewTracer(...)
defer closer.Close()
```
This is especially useful for command-line tools that enable tracing, as well as
for the long-running apps that support graceful shutdown. For example, if your deployment
system sends SIGTERM instead of killing the process and you trap that signal to do a graceful
exit, then having `defer closer.Closer()` ensures that all buffered spans are flushed.
### Metrics & Monitoring
The tracer emits a number of different metrics, defined in
[metrics.go](metrics.go). The monitoring backend is expected to support
tag-based metric names, e.g. instead of `statsd`-style string names
like `counters.my-service.jaeger.spans.started.sampled`, the metrics
are defined by a short name and a collection of key/value tags, for
example: `name:jaeger.traces, state:started, sampled:y`. See [metrics.go](./metrics.go)
file for the full list and descriptions of emitted metrics.
The monitoring backend is represented by the `metrics.Factory` interface from package
[`"github.com/uber/jaeger-lib/metrics"`](https://github.com/jaegertracing/jaeger-lib/tree/master/metrics). An implementation
of that interface can be passed as an option to either the Configuration object or the Tracer
constructor, for example:
```go
import (
"github.com/uber/jaeger-client-go/config"
"github.com/uber/jaeger-lib/metrics/prometheus"
)
metricsFactory := prometheus.New()
tracer, closer, err := config.Configuration{
ServiceName: "your-service-name",
}.NewTracer(
config.Metrics(metricsFactory),
)
```
By default, a no-op `metrics.NullFactory` is used.
### Logging
The tracer can be configured with an optional logger, which will be
used to log communication errors, or log spans if a logging reporter
option is specified in the configuration. The logging API is abstracted
by the [Logger](logger.go) interface. A logger instance implementing
this interface can be set on the `Config` object before calling the
`New` method.
Besides the [zap](https://github.com/uber-go/zap) implementation
bundled with this package there is also a [go-kit](https://github.com/go-kit/kit)
one in the [jaeger-lib](https://github.com/jaegertracing/jaeger-lib) repository.
## Instrumentation for Tracing
Since this tracer is fully compliant with OpenTracing API 1.0,
all code instrumentation should only use the API itself, as described
in the [opentracing-go](https://github.com/opentracing/opentracing-go) documentation.
## Features
### Reporters
A "reporter" is a component that receives the finished spans and reports
them to somewhere. Under normal circumstances, the Tracer
should use the default `RemoteReporter`, which sends the spans out of
process via configurable "transport". For testing purposes, one can
use an `InMemoryReporter` that accumulates spans in a buffer and
allows to retrieve them for later verification. Also available are
`NullReporter`, a no-op reporter that does nothing, a `LoggingReporter`
which logs all finished spans using their `String()` method, and a
`CompositeReporter` that can be used to combine more than one reporter
into one, e.g. to attach a logging reporter to the main remote reporter.
### Span Reporting Transports
The remote reporter uses "transports" to actually send the spans out
of process. Currently the supported transports include:
* [Jaeger Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/agent.thrift) over UDP or HTTP,
* [Zipkin Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/zipkincore.thrift) over HTTP.
### Sampling
The tracer does not record all spans, but only those that have the
sampling bit set in the `flags`. When a new trace is started and a new
unique ID is generated, a sampling decision is made whether this trace
should be sampled. The sampling decision is propagated to all downstream
calls via the `flags` field of the trace context. The following samplers
are available:
1. `RemotelyControlledSampler` uses one of the other simpler samplers
and periodically updates it by polling an external server. This
allows dynamic control of the sampling strategies.
1. `ConstSampler` always makes the same sampling decision for all
trace IDs. it can be configured to either sample all traces, or
to sample none.
1. `ProbabilisticSampler` uses a fixed sampling rate as a probability
for a given trace to be sampled. The actual decision is made by
comparing the trace ID with a random number multiplied by the
sampling rate.
1. `RateLimitingSampler` can be used to allow only a certain fixed
number of traces to be sampled per second.
### Baggage Injection
The OpenTracing spec allows for [baggage][baggage], which are key value pairs that are added
to the span context and propagated throughout the trace. An external process can inject baggage
by setting the special HTTP Header `jaeger-baggage` on a request:
```sh
curl -H "jaeger-baggage: key1=value1, key2=value2" http://myhost.com
```
Baggage can also be programatically set inside your service:
```go
if span := opentracing.SpanFromContext(ctx); span != nil {
span.SetBaggageItem("key", "value")
}
```
Another service downstream of that can retrieve the baggage in a similar way:
```go
if span := opentracing.SpanFromContext(ctx); span != nil {
val := span.BaggageItem("key")
println(val)
}
```
### Debug Traces (Forced Sampling)
#### Programmatically
The OpenTracing API defines a `sampling.priority` standard tag that
can be used to affect the sampling of a span and its children:
```go
import (
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
)
span := opentracing.SpanFromContext(ctx)
ext.SamplingPriority.Set(span, 1)
```
#### Via HTTP Headers
Jaeger Tracer also understands a special HTTP Header `jaeger-debug-id`,
which can be set in the incoming request, e.g.
```sh
curl -H "jaeger-debug-id: some-correlation-id" http://myhost.com
```
When Jaeger sees this header in the request that otherwise has no
tracing context, it ensures that the new trace started for this
request will be sampled in the "debug" mode (meaning it should survive
all downsampling that might happen in the collection pipeline), and the
root span will have a tag as if this statement was executed:
```go
span.SetTag("jaeger-debug-id", "some-correlation-id")
```
This allows using Jaeger UI to find the trace by this tag.
### Zipkin HTTP B3 compatible header propagation
Jaeger Tracer supports Zipkin B3 Propagation HTTP headers, which are used
by a lot of Zipkin tracers. This means that you can use Jaeger in conjunction with e.g. [these OpenZipkin tracers](https://github.com/openzipkin).
However it is not the default propagation format, see [here](zipkin/README.md#NewZipkinB3HTTPHeaderPropagator) how to set it up.
## License
[Apache 2.0 License](LICENSE).
[doc-img]: https://godoc.org/github.com/uber/jaeger-client-go?status.svg
[doc]: https://godoc.org/github.com/uber/jaeger-client-go
[ci-img]: https://travis-ci.org/jaegertracing/jaeger-client-go.svg?branch=master
[ci]: https://travis-ci.org/jaegertracing/jaeger-client-go
[cov-img]: https://codecov.io/gh/jaegertracing/jaeger-client-go/branch/master/graph/badge.svg
[cov]: https://codecov.io/gh/jaegertracing/jaeger-client-go
[ot-img]: https://img.shields.io/badge/OpenTracing--1.0-enabled-blue.svg
[ot-url]: http://opentracing.io
[baggage]: https://github.com/opentracing/specification/blob/master/specification.md#set-a-baggage-item

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# Release Process
1. Create a PR "Preparing for release X.Y.Z" against master branch
* Alter CHANGELOG.md from `<placeholder_version> (unreleased)` to `<X.Y.Z> (YYYY-MM-DD)`
* Update `JaegerClientVersion` in constants.go to `Go-X.Y.Z`
2. Create a release "Release X.Y.Z" on Github
* Create Tag `vX.Y.Z`
* Copy CHANGELOG.md into the release notes
3. Create a PR "Back to development" against master branch
* Add `<next_version> (unreleased)` to CHANGELOG.md
* Update `JaegerClientVersion` in constants.go to `Go-<next_version>dev`

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"github.com/opentracing/opentracing-go/log"
"github.com/uber/jaeger-client-go/internal/baggage"
)
// baggageSetter is an actor that can set a baggage value on a Span given certain
// restrictions (eg. maxValueLength).
type baggageSetter struct {
restrictionManager baggage.RestrictionManager
metrics *Metrics
}
func newBaggageSetter(restrictionManager baggage.RestrictionManager, metrics *Metrics) *baggageSetter {
return &baggageSetter{
restrictionManager: restrictionManager,
metrics: metrics,
}
}
// (NB) span should hold the lock before making this call
func (s *baggageSetter) setBaggage(span *Span, key, value string) {
var truncated bool
var prevItem string
restriction := s.restrictionManager.GetRestriction(span.serviceName(), key)
if !restriction.KeyAllowed() {
s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
s.metrics.BaggageUpdateFailure.Inc(1)
return
}
if len(value) > restriction.MaxValueLength() {
truncated = true
value = value[:restriction.MaxValueLength()]
s.metrics.BaggageTruncate.Inc(1)
}
prevItem = span.context.baggage[key]
s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
span.context = span.context.WithBaggageItem(key, value)
s.metrics.BaggageUpdateSuccess.Inc(1)
}
func (s *baggageSetter) logFields(span *Span, key, value, prevItem string, truncated, valid bool) {
if !span.context.IsSampled() {
return
}
fields := []log.Field{
log.String("event", "baggage"),
log.String("key", key),
log.String("value", value),
}
if prevItem != "" {
fields = append(fields, log.String("override", "true"))
}
if truncated {
fields = append(fields, log.String("truncated", "true"))
}
if !valid {
fields = append(fields, log.String("invalid", "true"))
}
span.logFieldsNoLocking(fields...)
}

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// Copyright (c) 2017-2018 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"errors"
"fmt"
"io"
"strings"
"time"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go"
"github.com/uber/jaeger-client-go/internal/baggage/remote"
throttler "github.com/uber/jaeger-client-go/internal/throttler/remote"
"github.com/uber/jaeger-client-go/rpcmetrics"
)
const defaultSamplingProbability = 0.001
// Configuration configures and creates Jaeger Tracer
type Configuration struct {
// ServiceName specifies the service name to use on the tracer.
// Can be provided via environment variable named JAEGER_SERVICE_NAME
ServiceName string `yaml:"serviceName"`
// Disabled can be provided via environment variable named JAEGER_DISABLED
Disabled bool `yaml:"disabled"`
// RPCMetrics can be provided via environment variable named JAEGER_RPC_METRICS
RPCMetrics bool `yaml:"rpc_metrics"`
// Tags can be provided via environment variable named JAEGER_TAGS
Tags []opentracing.Tag `yaml:"tags"`
Sampler *SamplerConfig `yaml:"sampler"`
Reporter *ReporterConfig `yaml:"reporter"`
Headers *jaeger.HeadersConfig `yaml:"headers"`
BaggageRestrictions *BaggageRestrictionsConfig `yaml:"baggage_restrictions"`
Throttler *ThrottlerConfig `yaml:"throttler"`
}
// SamplerConfig allows initializing a non-default sampler. All fields are optional.
type SamplerConfig struct {
// Type specifies the type of the sampler: const, probabilistic, rateLimiting, or remote
// Can be set by exporting an environment variable named JAEGER_SAMPLER_TYPE
Type string `yaml:"type"`
// Param is a value passed to the sampler.
// Valid values for Param field are:
// - for "const" sampler, 0 or 1 for always false/true respectively
// - for "probabilistic" sampler, a probability between 0 and 1
// - for "rateLimiting" sampler, the number of spans per second
// - for "remote" sampler, param is the same as for "probabilistic"
// and indicates the initial sampling rate before the actual one
// is received from the mothership.
// Can be set by exporting an environment variable named JAEGER_SAMPLER_PARAM
Param float64 `yaml:"param"`
// SamplingServerURL is the address of jaeger-agent's HTTP sampling server
// Can be set by exporting an environment variable named JAEGER_SAMPLER_MANAGER_HOST_PORT
SamplingServerURL string `yaml:"samplingServerURL"`
// MaxOperations is the maximum number of operations that the sampler
// will keep track of. If an operation is not tracked, a default probabilistic
// sampler will be used rather than the per operation specific sampler.
// Can be set by exporting an environment variable named JAEGER_SAMPLER_MAX_OPERATIONS
MaxOperations int `yaml:"maxOperations"`
// SamplingRefreshInterval controls how often the remotely controlled sampler will poll
// jaeger-agent for the appropriate sampling strategy.
// Can be set by exporting an environment variable named JAEGER_SAMPLER_REFRESH_INTERVAL
SamplingRefreshInterval time.Duration `yaml:"samplingRefreshInterval"`
}
// ReporterConfig configures the reporter. All fields are optional.
type ReporterConfig struct {
// QueueSize controls how many spans the reporter can keep in memory before it starts dropping
// new spans. The queue is continuously drained by a background go-routine, as fast as spans
// can be sent out of process.
// Can be set by exporting an environment variable named JAEGER_REPORTER_MAX_QUEUE_SIZE
QueueSize int `yaml:"queueSize"`
// BufferFlushInterval controls how often the buffer is force-flushed, even if it's not full.
// It is generally not useful, as it only matters for very low traffic services.
// Can be set by exporting an environment variable named JAEGER_REPORTER_FLUSH_INTERVAL
BufferFlushInterval time.Duration
// LogSpans, when true, enables LoggingReporter that runs in parallel with the main reporter
// and logs all submitted spans. Main Configuration.Logger must be initialized in the code
// for this option to have any effect.
// Can be set by exporting an environment variable named JAEGER_REPORTER_LOG_SPANS
LogSpans bool `yaml:"logSpans"`
// LocalAgentHostPort instructs reporter to send spans to jaeger-agent at this address
// Can be set by exporting an environment variable named JAEGER_AGENT_HOST / JAEGER_AGENT_PORT
LocalAgentHostPort string `yaml:"localAgentHostPort"`
}
// BaggageRestrictionsConfig configures the baggage restrictions manager which can be used to whitelist
// certain baggage keys. All fields are optional.
type BaggageRestrictionsConfig struct {
// DenyBaggageOnInitializationFailure controls the startup failure mode of the baggage restriction
// manager. If true, the manager will not allow any baggage to be written until baggage restrictions have
// been retrieved from jaeger-agent. If false, the manager wil allow any baggage to be written until baggage
// restrictions have been retrieved from jaeger-agent.
DenyBaggageOnInitializationFailure bool `yaml:"denyBaggageOnInitializationFailure"`
// HostPort is the hostPort of jaeger-agent's baggage restrictions server
HostPort string `yaml:"hostPort"`
// RefreshInterval controls how often the baggage restriction manager will poll
// jaeger-agent for the most recent baggage restrictions.
RefreshInterval time.Duration `yaml:"refreshInterval"`
}
// ThrottlerConfig configures the throttler which can be used to throttle the
// rate at which the client may send debug requests.
type ThrottlerConfig struct {
// HostPort of jaeger-agent's credit server.
HostPort string `yaml:"hostPort"`
// RefreshInterval controls how often the throttler will poll jaeger-agent
// for more throttling credits.
RefreshInterval time.Duration `yaml:"refreshInterval"`
// SynchronousInitialization determines whether or not the throttler should
// synchronously fetch credits from the agent when an operation is seen for
// the first time. This should be set to true if the client will be used by
// a short lived service that needs to ensure that credits are fetched
// upfront such that sampling or throttling occurs.
SynchronousInitialization bool `yaml:"synchronousInitialization"`
}
type nullCloser struct{}
func (*nullCloser) Close() error { return nil }
// New creates a new Jaeger Tracer, and a closer func that can be used to flush buffers
// before shutdown.
//
// Deprecated: use NewTracer() function
func (c Configuration) New(
serviceName string,
options ...Option,
) (opentracing.Tracer, io.Closer, error) {
if serviceName != "" {
c.ServiceName = serviceName
}
return c.NewTracer(options...)
}
// NewTracer returns a new tracer based on the current configuration, using the given options,
// and a closer func that can be used to flush buffers before shutdown.
func (c Configuration) NewTracer(options ...Option) (opentracing.Tracer, io.Closer, error) {
if c.ServiceName == "" {
return nil, nil, errors.New("no service name provided")
}
if c.Disabled {
return &opentracing.NoopTracer{}, &nullCloser{}, nil
}
opts := applyOptions(options...)
tracerMetrics := jaeger.NewMetrics(opts.metrics, nil)
if c.RPCMetrics {
Observer(
rpcmetrics.NewObserver(
opts.metrics.Namespace("jaeger-rpc", map[string]string{"component": "jaeger"}),
rpcmetrics.DefaultNameNormalizer,
),
)(&opts) // adds to c.observers
}
if c.Sampler == nil {
c.Sampler = &SamplerConfig{
Type: jaeger.SamplerTypeRemote,
Param: defaultSamplingProbability,
}
}
if c.Reporter == nil {
c.Reporter = &ReporterConfig{}
}
sampler := opts.sampler
if sampler == nil {
s, err := c.Sampler.NewSampler(c.ServiceName, tracerMetrics)
if err != nil {
return nil, nil, err
}
sampler = s
}
reporter := opts.reporter
if reporter == nil {
r, err := c.Reporter.NewReporter(c.ServiceName, tracerMetrics, opts.logger)
if err != nil {
return nil, nil, err
}
reporter = r
}
tracerOptions := []jaeger.TracerOption{
jaeger.TracerOptions.Metrics(tracerMetrics),
jaeger.TracerOptions.Logger(opts.logger),
jaeger.TracerOptions.CustomHeaderKeys(c.Headers),
jaeger.TracerOptions.Gen128Bit(opts.gen128Bit),
jaeger.TracerOptions.ZipkinSharedRPCSpan(opts.zipkinSharedRPCSpan),
jaeger.TracerOptions.MaxTagValueLength(opts.maxTagValueLength),
}
for _, tag := range opts.tags {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
}
for _, tag := range c.Tags {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
}
for _, obs := range opts.observers {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Observer(obs))
}
for _, cobs := range opts.contribObservers {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.ContribObserver(cobs))
}
for format, injector := range opts.injectors {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Injector(format, injector))
}
for format, extractor := range opts.extractors {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Extractor(format, extractor))
}
if c.BaggageRestrictions != nil {
mgr := remote.NewRestrictionManager(
c.ServiceName,
remote.Options.Metrics(tracerMetrics),
remote.Options.Logger(opts.logger),
remote.Options.HostPort(c.BaggageRestrictions.HostPort),
remote.Options.RefreshInterval(c.BaggageRestrictions.RefreshInterval),
remote.Options.DenyBaggageOnInitializationFailure(
c.BaggageRestrictions.DenyBaggageOnInitializationFailure,
),
)
tracerOptions = append(tracerOptions, jaeger.TracerOptions.BaggageRestrictionManager(mgr))
}
if c.Throttler != nil {
debugThrottler := throttler.NewThrottler(
c.ServiceName,
throttler.Options.Metrics(tracerMetrics),
throttler.Options.Logger(opts.logger),
throttler.Options.HostPort(c.Throttler.HostPort),
throttler.Options.RefreshInterval(c.Throttler.RefreshInterval),
throttler.Options.SynchronousInitialization(
c.Throttler.SynchronousInitialization,
),
)
tracerOptions = append(tracerOptions, jaeger.TracerOptions.DebugThrottler(debugThrottler))
}
tracer, closer := jaeger.NewTracer(
c.ServiceName,
sampler,
reporter,
tracerOptions...,
)
return tracer, closer, nil
}
// InitGlobalTracer creates a new Jaeger Tracer, and sets it as global OpenTracing Tracer.
// It returns a closer func that can be used to flush buffers before shutdown.
func (c Configuration) InitGlobalTracer(
serviceName string,
options ...Option,
) (io.Closer, error) {
if c.Disabled {
return &nullCloser{}, nil
}
tracer, closer, err := c.New(serviceName, options...)
if err != nil {
return nil, err
}
opentracing.SetGlobalTracer(tracer)
return closer, nil
}
// NewSampler creates a new sampler based on the configuration
func (sc *SamplerConfig) NewSampler(
serviceName string,
metrics *jaeger.Metrics,
) (jaeger.Sampler, error) {
samplerType := strings.ToLower(sc.Type)
if samplerType == jaeger.SamplerTypeConst {
return jaeger.NewConstSampler(sc.Param != 0), nil
}
if samplerType == jaeger.SamplerTypeProbabilistic {
if sc.Param >= 0 && sc.Param <= 1.0 {
return jaeger.NewProbabilisticSampler(sc.Param)
}
return nil, fmt.Errorf(
"Invalid Param for probabilistic sampler: %v. Expecting value between 0 and 1",
sc.Param,
)
}
if samplerType == jaeger.SamplerTypeRateLimiting {
return jaeger.NewRateLimitingSampler(sc.Param), nil
}
if samplerType == jaeger.SamplerTypeRemote || sc.Type == "" {
sc2 := *sc
sc2.Type = jaeger.SamplerTypeProbabilistic
initSampler, err := sc2.NewSampler(serviceName, nil)
if err != nil {
return nil, err
}
options := []jaeger.SamplerOption{
jaeger.SamplerOptions.Metrics(metrics),
jaeger.SamplerOptions.InitialSampler(initSampler),
jaeger.SamplerOptions.SamplingServerURL(sc.SamplingServerURL),
}
if sc.MaxOperations != 0 {
options = append(options, jaeger.SamplerOptions.MaxOperations(sc.MaxOperations))
}
if sc.SamplingRefreshInterval != 0 {
options = append(options, jaeger.SamplerOptions.SamplingRefreshInterval(sc.SamplingRefreshInterval))
}
return jaeger.NewRemotelyControlledSampler(serviceName, options...), nil
}
return nil, fmt.Errorf("Unknown sampler type %v", sc.Type)
}
// NewReporter instantiates a new reporter that submits spans to tcollector
func (rc *ReporterConfig) NewReporter(
serviceName string,
metrics *jaeger.Metrics,
logger jaeger.Logger,
) (jaeger.Reporter, error) {
sender, err := rc.newTransport()
if err != nil {
return nil, err
}
reporter := jaeger.NewRemoteReporter(
sender,
jaeger.ReporterOptions.QueueSize(rc.QueueSize),
jaeger.ReporterOptions.BufferFlushInterval(rc.BufferFlushInterval),
jaeger.ReporterOptions.Logger(logger),
jaeger.ReporterOptions.Metrics(metrics))
if rc.LogSpans && logger != nil {
logger.Infof("Initializing logging reporter\n")
reporter = jaeger.NewCompositeReporter(jaeger.NewLoggingReporter(logger), reporter)
}
return reporter, err
}
func (rc *ReporterConfig) newTransport() (jaeger.Transport, error) {
return jaeger.NewUDPTransport(rc.LocalAgentHostPort, 0)
}

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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"fmt"
"os"
"strconv"
"strings"
"time"
opentracing "github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/uber/jaeger-client-go"
)
const (
// environment variable names
envServiceName = "JAEGER_SERVICE_NAME"
envDisabled = "JAEGER_DISABLED"
envRPCMetrics = "JAEGER_RPC_METRICS"
envTags = "JAEGER_TAGS"
envSamplerType = "JAEGER_SAMPLER_TYPE"
envSamplerParam = "JAEGER_SAMPLER_PARAM"
envSamplerManagerHostPort = "JAEGER_SAMPLER_MANAGER_HOST_PORT"
envSamplerMaxOperations = "JAEGER_SAMPLER_MAX_OPERATIONS"
envSamplerRefreshInterval = "JAEGER_SAMPLER_REFRESH_INTERVAL"
envReporterMaxQueueSize = "JAEGER_REPORTER_MAX_QUEUE_SIZE"
envReporterFlushInterval = "JAEGER_REPORTER_FLUSH_INTERVAL"
envReporterLogSpans = "JAEGER_REPORTER_LOG_SPANS"
envAgentHost = "JAEGER_AGENT_HOST"
envAgentPort = "JAEGER_AGENT_PORT"
)
// FromEnv uses environment variables to set the tracer's Configuration
func FromEnv() (*Configuration, error) {
c := &Configuration{}
if e := os.Getenv(envServiceName); e != "" {
c.ServiceName = e
}
if e := os.Getenv(envRPCMetrics); e != "" {
if value, err := strconv.ParseBool(e); err == nil {
c.RPCMetrics = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envRPCMetrics, e)
}
}
if e := os.Getenv(envDisabled); e != "" {
if value, err := strconv.ParseBool(e); err == nil {
c.Disabled = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envDisabled, e)
}
}
if e := os.Getenv(envTags); e != "" {
c.Tags = parseTags(e)
}
if s, err := samplerConfigFromEnv(); err == nil {
c.Sampler = s
} else {
return nil, errors.Wrap(err, "cannot obtain sampler config from env")
}
if r, err := reporterConfigFromEnv(); err == nil {
c.Reporter = r
} else {
return nil, errors.Wrap(err, "cannot obtain reporter config from env")
}
return c, nil
}
// samplerConfigFromEnv creates a new SamplerConfig based on the environment variables
func samplerConfigFromEnv() (*SamplerConfig, error) {
sc := &SamplerConfig{}
if e := os.Getenv(envSamplerType); e != "" {
sc.Type = e
}
if e := os.Getenv(envSamplerParam); e != "" {
if value, err := strconv.ParseFloat(e, 64); err == nil {
sc.Param = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerParam, e)
}
}
if e := os.Getenv(envSamplerManagerHostPort); e != "" {
sc.SamplingServerURL = e
}
if e := os.Getenv(envSamplerMaxOperations); e != "" {
if value, err := strconv.ParseInt(e, 10, 0); err == nil {
sc.MaxOperations = int(value)
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerMaxOperations, e)
}
}
if e := os.Getenv(envSamplerRefreshInterval); e != "" {
if value, err := time.ParseDuration(e); err == nil {
sc.SamplingRefreshInterval = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerRefreshInterval, e)
}
}
return sc, nil
}
// reporterConfigFromEnv creates a new ReporterConfig based on the environment variables
func reporterConfigFromEnv() (*ReporterConfig, error) {
rc := &ReporterConfig{}
if e := os.Getenv(envReporterMaxQueueSize); e != "" {
if value, err := strconv.ParseInt(e, 10, 0); err == nil {
rc.QueueSize = int(value)
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterMaxQueueSize, e)
}
}
if e := os.Getenv(envReporterFlushInterval); e != "" {
if value, err := time.ParseDuration(e); err == nil {
rc.BufferFlushInterval = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterFlushInterval, e)
}
}
if e := os.Getenv(envReporterLogSpans); e != "" {
if value, err := strconv.ParseBool(e); err == nil {
rc.LogSpans = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterLogSpans, e)
}
}
host := jaeger.DefaultUDPSpanServerHost
if e := os.Getenv(envAgentHost); e != "" {
host = e
}
port := jaeger.DefaultUDPSpanServerPort
if e := os.Getenv(envAgentPort); e != "" {
if value, err := strconv.ParseInt(e, 10, 0); err == nil {
port = int(value)
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envAgentPort, e)
}
}
// the side effect of this is that we are building the default value, even if none of the env vars
// were not explicitly passed
rc.LocalAgentHostPort = fmt.Sprintf("%s:%d", host, port)
return rc, nil
}
// parseTags parses the given string into a collection of Tags.
// Spec for this value:
// - comma separated list of key=value
// - value can be specified using the notation ${envVar:defaultValue}, where `envVar`
// is an environment variable and `defaultValue` is the value to use in case the env var is not set
func parseTags(sTags string) []opentracing.Tag {
pairs := strings.Split(sTags, ",")
tags := make([]opentracing.Tag, 0)
for _, p := range pairs {
kv := strings.SplitN(p, "=", 2)
k, v := strings.TrimSpace(kv[0]), strings.TrimSpace(kv[1])
if strings.HasPrefix(v, "${") && strings.HasSuffix(v, "}") {
ed := strings.SplitN(v[2:len(v)-1], ":", 2)
e, d := ed[0], ed[1]
v = os.Getenv(e)
if v == "" && d != "" {
v = d
}
}
tag := opentracing.Tag{Key: k, Value: v}
tags = append(tags, tag)
}
return tags
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
opentracing "github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-lib/metrics"
"github.com/uber/jaeger-client-go"
)
// Option is a function that sets some option on the client.
type Option func(c *Options)
// Options control behavior of the client.
type Options struct {
metrics metrics.Factory
logger jaeger.Logger
reporter jaeger.Reporter
sampler jaeger.Sampler
contribObservers []jaeger.ContribObserver
observers []jaeger.Observer
gen128Bit bool
zipkinSharedRPCSpan bool
maxTagValueLength int
tags []opentracing.Tag
injectors map[interface{}]jaeger.Injector
extractors map[interface{}]jaeger.Extractor
}
// Metrics creates an Option that initializes Metrics in the tracer,
// which is used to emit statistics about spans.
func Metrics(factory metrics.Factory) Option {
return func(c *Options) {
c.metrics = factory
}
}
// Logger can be provided to log Reporter errors, as well as to log spans
// if Reporter.LogSpans is set to true.
func Logger(logger jaeger.Logger) Option {
return func(c *Options) {
c.logger = logger
}
}
// Reporter can be provided explicitly to override the configuration.
// Useful for testing, e.g. by passing InMemoryReporter.
func Reporter(reporter jaeger.Reporter) Option {
return func(c *Options) {
c.reporter = reporter
}
}
// Sampler can be provided explicitly to override the configuration.
func Sampler(sampler jaeger.Sampler) Option {
return func(c *Options) {
c.sampler = sampler
}
}
// Observer can be registered with the Tracer to receive notifications about new Spans.
func Observer(observer jaeger.Observer) Option {
return func(c *Options) {
c.observers = append(c.observers, observer)
}
}
// ContribObserver can be registered with the Tracer to recieve notifications
// about new spans.
func ContribObserver(observer jaeger.ContribObserver) Option {
return func(c *Options) {
c.contribObservers = append(c.contribObservers, observer)
}
}
// Gen128Bit specifies whether to generate 128bit trace IDs.
func Gen128Bit(gen128Bit bool) Option {
return func(c *Options) {
c.gen128Bit = gen128Bit
}
}
// ZipkinSharedRPCSpan creates an option that enables sharing span ID between client
// and server spans a la zipkin. If false, client and server spans will be assigned
// different IDs.
func ZipkinSharedRPCSpan(zipkinSharedRPCSpan bool) Option {
return func(c *Options) {
c.zipkinSharedRPCSpan = zipkinSharedRPCSpan
}
}
// MaxTagValueLength can be provided to override the default max tag value length.
func MaxTagValueLength(maxTagValueLength int) Option {
return func(c *Options) {
c.maxTagValueLength = maxTagValueLength
}
}
// Tag creates an option that adds a tracer-level tag.
func Tag(key string, value interface{}) Option {
return func(c *Options) {
c.tags = append(c.tags, opentracing.Tag{Key: key, Value: value})
}
}
// Injector registers an Injector with the given format.
func Injector(format interface{}, injector jaeger.Injector) Option {
return func(c *Options) {
c.injectors[format] = injector
}
}
// Extractor registers an Extractor with the given format.
func Extractor(format interface{}, extractor jaeger.Extractor) Option {
return func(c *Options) {
c.extractors[format] = extractor
}
}
func applyOptions(options ...Option) Options {
opts := Options{
injectors: make(map[interface{}]jaeger.Injector),
extractors: make(map[interface{}]jaeger.Extractor),
}
for _, option := range options {
option(&opts)
}
if opts.metrics == nil {
opts.metrics = metrics.NullFactory
}
if opts.logger == nil {
opts.logger = jaeger.NullLogger
}
return opts
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
const (
// JaegerClientVersion is the version of the client library reported as Span tag.
JaegerClientVersion = "Go-2.15.0-dev"
// JaegerClientVersionTagKey is the name of the tag used to report client version.
JaegerClientVersionTagKey = "jaeger.version"
// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
// if found in the carrier, forces the trace to be sampled as "debug" trace.
// The value of the header is recorded as the tag on the root span, so that the
// trace can be found in the UI using this value as a correlation ID.
JaegerDebugHeader = "jaeger-debug-id"
// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
// a root span does not exist.
JaegerBaggageHeader = "jaeger-baggage"
// TracerHostnameTagKey used to report host name of the process.
TracerHostnameTagKey = "hostname"
// TracerIPTagKey used to report ip of the process.
TracerIPTagKey = "ip"
// TracerUUIDTagKey used to report UUID of the client process.
TracerUUIDTagKey = "client-uuid"
// SamplerTypeTagKey reports which sampler was used on the root span.
SamplerTypeTagKey = "sampler.type"
// SamplerParamTagKey reports the parameter of the sampler, like sampling probability.
SamplerParamTagKey = "sampler.param"
// TraceContextHeaderName is the http header name used to propagate tracing context.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceContextHeaderName = "uber-trace-id"
// TracerStateHeaderName is deprecated.
// Deprecated: use TraceContextHeaderName
TracerStateHeaderName = TraceContextHeaderName
// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceBaggageHeaderPrefix = "uberctx-"
// SamplerTypeConst is the type of sampler that always makes the same decision.
SamplerTypeConst = "const"
// SamplerTypeRemote is the type of sampler that polls Jaeger agent for sampling strategy.
SamplerTypeRemote = "remote"
// SamplerTypeProbabilistic is the type of sampler that samples traces
// with a certain fixed probability.
SamplerTypeProbabilistic = "probabilistic"
// SamplerTypeRateLimiting is the type of sampler that samples
// only up to a fixed number of traces per second.
SamplerTypeRateLimiting = "ratelimiting"
// SamplerTypeLowerBound is the type of sampler that samples
// at least a fixed number of traces per second.
SamplerTypeLowerBound = "lowerbound"
// DefaultUDPSpanServerHost is the default host to send the spans to, via UDP
DefaultUDPSpanServerHost = "localhost"
// DefaultUDPSpanServerPort is the default port to send the spans to, via UDP
DefaultUDPSpanServerPort = 6831
// DefaultMaxTagValueLength is the default max length of byte array or string allowed in the tag value.
DefaultMaxTagValueLength = 256
)

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"errors"
"fmt"
"strconv"
"strings"
)
const (
flagSampled = byte(1)
flagDebug = byte(2)
)
var (
errEmptyTracerStateString = errors.New("Cannot convert empty string to tracer state")
errMalformedTracerStateString = errors.New("String does not match tracer state format")
emptyContext = SpanContext{}
)
// TraceID represents unique 128bit identifier of a trace
type TraceID struct {
High, Low uint64
}
// SpanID represents unique 64bit identifier of a span
type SpanID uint64
// SpanContext represents propagated span identity and state
type SpanContext struct {
// traceID represents globally unique ID of the trace.
// Usually generated as a random number.
traceID TraceID
// spanID represents span ID that must be unique within its trace,
// but does not have to be globally unique.
spanID SpanID
// parentID refers to the ID of the parent span.
// Should be 0 if the current span is a root span.
parentID SpanID
// flags is a bitmap containing such bits as 'sampled' and 'debug'.
flags byte
// Distributed Context baggage. The is a snapshot in time.
baggage map[string]string
// debugID can be set to some correlation ID when the context is being
// extracted from a TextMap carrier.
//
// See JaegerDebugHeader in constants.go
debugID string
}
// ForeachBaggageItem implements ForeachBaggageItem() of opentracing.SpanContext
func (c SpanContext) ForeachBaggageItem(handler func(k, v string) bool) {
for k, v := range c.baggage {
if !handler(k, v) {
break
}
}
}
// IsSampled returns whether this trace was chosen for permanent storage
// by the sampling mechanism of the tracer.
func (c SpanContext) IsSampled() bool {
return (c.flags & flagSampled) == flagSampled
}
// IsDebug indicates whether sampling was explicitly requested by the service.
func (c SpanContext) IsDebug() bool {
return (c.flags & flagDebug) == flagDebug
}
// IsValid indicates whether this context actually represents a valid trace.
func (c SpanContext) IsValid() bool {
return c.traceID.IsValid() && c.spanID != 0
}
func (c SpanContext) String() string {
if c.traceID.High == 0 {
return fmt.Sprintf("%x:%x:%x:%x", c.traceID.Low, uint64(c.spanID), uint64(c.parentID), c.flags)
}
return fmt.Sprintf("%x%016x:%x:%x:%x", c.traceID.High, c.traceID.Low, uint64(c.spanID), uint64(c.parentID), c.flags)
}
// ContextFromString reconstructs the Context encoded in a string
func ContextFromString(value string) (SpanContext, error) {
var context SpanContext
if value == "" {
return emptyContext, errEmptyTracerStateString
}
parts := strings.Split(value, ":")
if len(parts) != 4 {
return emptyContext, errMalformedTracerStateString
}
var err error
if context.traceID, err = TraceIDFromString(parts[0]); err != nil {
return emptyContext, err
}
if context.spanID, err = SpanIDFromString(parts[1]); err != nil {
return emptyContext, err
}
if context.parentID, err = SpanIDFromString(parts[2]); err != nil {
return emptyContext, err
}
flags, err := strconv.ParseUint(parts[3], 10, 8)
if err != nil {
return emptyContext, err
}
context.flags = byte(flags)
return context, nil
}
// TraceID returns the trace ID of this span context
func (c SpanContext) TraceID() TraceID {
return c.traceID
}
// SpanID returns the span ID of this span context
func (c SpanContext) SpanID() SpanID {
return c.spanID
}
// ParentID returns the parent span ID of this span context
func (c SpanContext) ParentID() SpanID {
return c.parentID
}
// NewSpanContext creates a new instance of SpanContext
func NewSpanContext(traceID TraceID, spanID, parentID SpanID, sampled bool, baggage map[string]string) SpanContext {
flags := byte(0)
if sampled {
flags = flagSampled
}
return SpanContext{
traceID: traceID,
spanID: spanID,
parentID: parentID,
flags: flags,
baggage: baggage}
}
// CopyFrom copies data from ctx into this context, including span identity and baggage.
// TODO This is only used by interop.go. Remove once TChannel Go supports OpenTracing.
func (c *SpanContext) CopyFrom(ctx *SpanContext) {
c.traceID = ctx.traceID
c.spanID = ctx.spanID
c.parentID = ctx.parentID
c.flags = ctx.flags
if l := len(ctx.baggage); l > 0 {
c.baggage = make(map[string]string, l)
for k, v := range ctx.baggage {
c.baggage[k] = v
}
} else {
c.baggage = nil
}
}
// WithBaggageItem creates a new context with an extra baggage item.
func (c SpanContext) WithBaggageItem(key, value string) SpanContext {
var newBaggage map[string]string
if c.baggage == nil {
newBaggage = map[string]string{key: value}
} else {
newBaggage = make(map[string]string, len(c.baggage)+1)
for k, v := range c.baggage {
newBaggage[k] = v
}
newBaggage[key] = value
}
// Use positional parameters so the compiler will help catch new fields.
return SpanContext{c.traceID, c.spanID, c.parentID, c.flags, newBaggage, ""}
}
// isDebugIDContainerOnly returns true when the instance of the context is only
// used to return the debug/correlation ID from extract() method. This happens
// in the situation when "jaeger-debug-id" header is passed in the carrier to
// the extract() method, but the request otherwise has no span context in it.
// Previously this would've returned opentracing.ErrSpanContextNotFound from the
// extract method, but now it returns a dummy context with only debugID filled in.
//
// See JaegerDebugHeader in constants.go
// See textMapPropagator#Extract
func (c *SpanContext) isDebugIDContainerOnly() bool {
return !c.traceID.IsValid() && c.debugID != ""
}
// ------- TraceID -------
func (t TraceID) String() string {
if t.High == 0 {
return fmt.Sprintf("%x", t.Low)
}
return fmt.Sprintf("%x%016x", t.High, t.Low)
}
// TraceIDFromString creates a TraceID from a hexadecimal string
func TraceIDFromString(s string) (TraceID, error) {
var hi, lo uint64
var err error
if len(s) > 32 {
return TraceID{}, fmt.Errorf("TraceID cannot be longer than 32 hex characters: %s", s)
} else if len(s) > 16 {
hiLen := len(s) - 16
if hi, err = strconv.ParseUint(s[0:hiLen], 16, 64); err != nil {
return TraceID{}, err
}
if lo, err = strconv.ParseUint(s[hiLen:], 16, 64); err != nil {
return TraceID{}, err
}
} else {
if lo, err = strconv.ParseUint(s, 16, 64); err != nil {
return TraceID{}, err
}
}
return TraceID{High: hi, Low: lo}, nil
}
// IsValid checks if the trace ID is valid, i.e. not zero.
func (t TraceID) IsValid() bool {
return t.High != 0 || t.Low != 0
}
// ------- SpanID -------
func (s SpanID) String() string {
return fmt.Sprintf("%x", uint64(s))
}
// SpanIDFromString creates a SpanID from a hexadecimal string
func SpanIDFromString(s string) (SpanID, error) {
if len(s) > 16 {
return SpanID(0), fmt.Errorf("SpanID cannot be longer than 16 hex characters: %s", s)
}
id, err := strconv.ParseUint(s, 16, 64)
if err != nil {
return SpanID(0), err
}
return SpanID(id), nil
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
opentracing "github.com/opentracing/opentracing-go"
)
// ContribObserver can be registered with the Tracer to receive notifications
// about new Spans. Modelled after github.com/opentracing-contrib/go-observer.
type ContribObserver interface {
// Create and return a span observer. Called when a span starts.
// If the Observer is not interested in the given span, it must return (nil, false).
// E.g :
// func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
// var sp opentracing.Span
// sso := opentracing.StartSpanOptions{}
// if spanObserver, ok := Observer.OnStartSpan(span, opName, sso); ok {
// // we have a valid SpanObserver
// }
// ...
// }
OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool)
}
// ContribSpanObserver is created by the Observer and receives notifications
// about other Span events. This interface is meant to match
// github.com/opentracing-contrib/go-observer, via duck typing, without
// directly importing the go-observer package.
type ContribSpanObserver interface {
OnSetOperationName(operationName string)
OnSetTag(key string, value interface{})
OnFinish(options opentracing.FinishOptions)
}
// wrapper observer for the old observers (see observer.go)
type oldObserver struct {
obs Observer
}
func (o *oldObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool) {
spanObserver := o.obs.OnStartSpan(operationName, options)
return spanObserver, spanObserver != nil
}

24
vendor/github.com/uber/jaeger-client-go/doc.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
Package jaeger implements an OpenTracing (http://opentracing.io) Tracer.
It is currently using Zipkin-compatible data model and can be directly
itegrated with Zipkin backend (http://zipkin.io).
For integration instructions please refer to the README:
https://github.com/uber/jaeger-client-go/blob/master/README.md
*/
package jaeger

89
vendor/github.com/uber/jaeger-client-go/glide.lock generated vendored Normal file
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hash: 3accf84f97bff4a91162736104c0e9b9790820712bd86db6fec5e665f7196a82
updated: 2018-04-30T11:46:43.804556-04:00
imports:
- name: github.com/beorn7/perks
version: 3a771d992973f24aa725d07868b467d1ddfceafb
subpackages:
- quantile
- name: github.com/codahale/hdrhistogram
version: 3a0bb77429bd3a61596f5e8a3172445844342120
- name: github.com/crossdock/crossdock-go
version: 049aabb0122b03bc9bd30cab8f3f91fb60166361
subpackages:
- assert
- require
- name: github.com/davecgh/go-spew
version: 8991bc29aa16c548c550c7ff78260e27b9ab7c73
subpackages:
- spew
- name: github.com/golang/protobuf
version: bbd03ef6da3a115852eaf24c8a1c46aeb39aa175
subpackages:
- proto
- name: github.com/matttproud/golang_protobuf_extensions
version: c12348ce28de40eed0136aa2b644d0ee0650e56c
subpackages:
- pbutil
- name: github.com/opentracing/opentracing-go
version: 1949ddbfd147afd4d964a9f00b24eb291e0e7c38
subpackages:
- ext
- log
- name: github.com/pkg/errors
version: 645ef00459ed84a119197bfb8d8205042c6df63d
- name: github.com/pmezard/go-difflib
version: 792786c7400a136282c1664665ae0a8db921c6c2
subpackages:
- difflib
- name: github.com/prometheus/client_golang
version: c5b7fccd204277076155f10851dad72b76a49317
subpackages:
- prometheus
- name: github.com/prometheus/client_model
version: 99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c
subpackages:
- go
- name: github.com/prometheus/common
version: 38c53a9f4bfcd932d1b00bfc65e256a7fba6b37a
subpackages:
- expfmt
- internal/bitbucket.org/ww/goautoneg
- model
- name: github.com/prometheus/procfs
version: 780932d4fbbe0e69b84c34c20f5c8d0981e109ea
subpackages:
- internal/util
- nfs
- xfs
- name: github.com/stretchr/testify
version: 12b6f73e6084dad08a7c6e575284b177ecafbc71
subpackages:
- assert
- require
- suite
- name: github.com/uber/jaeger-lib
version: 4267858c0679cd4e47cefed8d7f70fd386cfb567
subpackages:
- metrics
- metrics/prometheus
- metrics/testutils
- name: go.uber.org/atomic
version: 8474b86a5a6f79c443ce4b2992817ff32cf208b8
- name: go.uber.org/multierr
version: 3c4937480c32f4c13a875a1829af76c98ca3d40a
- name: go.uber.org/zap
version: eeedf312bc6c57391d84767a4cd413f02a917974
subpackages:
- buffer
- internal/bufferpool
- internal/color
- internal/exit
- zapcore
- name: golang.org/x/net
version: 6078986fec03a1dcc236c34816c71b0e05018fda
subpackages:
- context
- context/ctxhttp
testImports:
- name: github.com/uber-go/atomic
version: 8474b86a5a6f79c443ce4b2992817ff32cf208b8

22
vendor/github.com/uber/jaeger-client-go/glide.yaml generated vendored Normal file
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package: github.com/uber/jaeger-client-go
import:
- package: github.com/opentracing/opentracing-go
version: ^1
subpackages:
- ext
- log
- package: github.com/crossdock/crossdock-go
- package: github.com/uber/jaeger-lib
version: ^1.2.1
subpackages:
- metrics
- package: github.com/pkg/errors
version: ~0.8.0
testImport:
- package: github.com/stretchr/testify
subpackages:
- assert
- require
- suite
- package: github.com/prometheus/client_golang
version: v0.8.0

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
// HeadersConfig contains the values for the header keys that Jaeger will use.
// These values may be either custom or default depending on whether custom
// values were provided via a configuration.
type HeadersConfig struct {
// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
// if found in the carrier, forces the trace to be sampled as "debug" trace.
// The value of the header is recorded as the tag on the root span, so that the
// trace can be found in the UI using this value as a correlation ID.
JaegerDebugHeader string `yaml:"jaegerDebugHeader"`
// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
// a root span does not exist.
JaegerBaggageHeader string `yaml:"jaegerBaggageHeader"`
// TraceContextHeaderName is the http header name used to propagate tracing context.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceContextHeaderName string `yaml:"TraceContextHeaderName"`
// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceBaggageHeaderPrefix string `yaml:"traceBaggageHeaderPrefix"`
}
func (c *HeadersConfig) applyDefaults() *HeadersConfig {
if c.JaegerBaggageHeader == "" {
c.JaegerBaggageHeader = JaegerBaggageHeader
}
if c.JaegerDebugHeader == "" {
c.JaegerDebugHeader = JaegerDebugHeader
}
if c.TraceBaggageHeaderPrefix == "" {
c.TraceBaggageHeaderPrefix = TraceBaggageHeaderPrefix
}
if c.TraceContextHeaderName == "" {
c.TraceContextHeaderName = TraceContextHeaderName
}
return c
}
func getDefaultHeadersConfig() *HeadersConfig {
return &HeadersConfig{
JaegerDebugHeader: JaegerDebugHeader,
JaegerBaggageHeader: JaegerBaggageHeader,
TraceContextHeaderName: TraceContextHeaderName,
TraceBaggageHeaderPrefix: TraceBaggageHeaderPrefix,
}
}

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vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/options.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"time"
"github.com/uber/jaeger-client-go"
)
const (
defaultMaxValueLength = 2048
defaultRefreshInterval = time.Minute
defaultHostPort = "localhost:5778"
)
// Option is a function that sets some option on the RestrictionManager
type Option func(options *options)
// Options is a factory for all available options
var Options options
type options struct {
denyBaggageOnInitializationFailure bool
metrics *jaeger.Metrics
logger jaeger.Logger
hostPort string
refreshInterval time.Duration
}
// DenyBaggageOnInitializationFailure creates an Option that determines the startup failure mode of RestrictionManager.
// If DenyBaggageOnInitializationFailure is true, RestrictionManager will not allow any baggage to be written until baggage
// restrictions have been retrieved from agent.
// If DenyBaggageOnInitializationFailure is false, RestrictionManager will allow any baggage to be written until baggage
// restrictions have been retrieved from agent.
func (options) DenyBaggageOnInitializationFailure(b bool) Option {
return func(o *options) {
o.denyBaggageOnInitializationFailure = b
}
}
// Metrics creates an Option that initializes Metrics on the RestrictionManager, which is used to emit statistics.
func (options) Metrics(m *jaeger.Metrics) Option {
return func(o *options) {
o.metrics = m
}
}
// Logger creates an Option that sets the logger used by the RestrictionManager.
func (options) Logger(logger jaeger.Logger) Option {
return func(o *options) {
o.logger = logger
}
}
// HostPort creates an Option that sets the hostPort of the local agent that contains the baggage restrictions.
func (options) HostPort(hostPort string) Option {
return func(o *options) {
o.hostPort = hostPort
}
}
// RefreshInterval creates an Option that sets how often the RestrictionManager will poll local agent for
// the baggage restrictions.
func (options) RefreshInterval(refreshInterval time.Duration) Option {
return func(o *options) {
o.refreshInterval = refreshInterval
}
}
func applyOptions(o ...Option) options {
opts := options{}
for _, option := range o {
option(&opts)
}
if opts.metrics == nil {
opts.metrics = jaeger.NewNullMetrics()
}
if opts.logger == nil {
opts.logger = jaeger.NullLogger
}
if opts.hostPort == "" {
opts.hostPort = defaultHostPort
}
if opts.refreshInterval == 0 {
opts.refreshInterval = defaultRefreshInterval
}
return opts
}

157
vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"fmt"
"net/url"
"sync"
"time"
"github.com/uber/jaeger-client-go/internal/baggage"
thrift "github.com/uber/jaeger-client-go/thrift-gen/baggage"
"github.com/uber/jaeger-client-go/utils"
)
type httpBaggageRestrictionManagerProxy struct {
url string
}
func newHTTPBaggageRestrictionManagerProxy(hostPort, serviceName string) *httpBaggageRestrictionManagerProxy {
v := url.Values{}
v.Set("service", serviceName)
return &httpBaggageRestrictionManagerProxy{
url: fmt.Sprintf("http://%s/baggageRestrictions?%s", hostPort, v.Encode()),
}
}
func (s *httpBaggageRestrictionManagerProxy) GetBaggageRestrictions(serviceName string) ([]*thrift.BaggageRestriction, error) {
var out []*thrift.BaggageRestriction
if err := utils.GetJSON(s.url, &out); err != nil {
return nil, err
}
return out, nil
}
// RestrictionManager manages baggage restrictions by retrieving baggage restrictions from agent
type RestrictionManager struct {
options
mux sync.RWMutex
serviceName string
restrictions map[string]*baggage.Restriction
thriftProxy thrift.BaggageRestrictionManager
pollStopped sync.WaitGroup
stopPoll chan struct{}
invalidRestriction *baggage.Restriction
validRestriction *baggage.Restriction
// Determines if the manager has successfully retrieved baggage restrictions from agent
initialized bool
}
// NewRestrictionManager returns a BaggageRestrictionManager that polls the agent for the latest
// baggage restrictions.
func NewRestrictionManager(serviceName string, options ...Option) *RestrictionManager {
// TODO there is a developing use case where a single tracer can generate traces on behalf of many services.
// restrictionsMap will need to exist per service
opts := applyOptions(options...)
m := &RestrictionManager{
serviceName: serviceName,
options: opts,
restrictions: make(map[string]*baggage.Restriction),
thriftProxy: newHTTPBaggageRestrictionManagerProxy(opts.hostPort, serviceName),
stopPoll: make(chan struct{}),
invalidRestriction: baggage.NewRestriction(false, 0),
validRestriction: baggage.NewRestriction(true, defaultMaxValueLength),
}
m.pollStopped.Add(1)
go m.pollManager()
return m
}
// isReady returns true if the manager has retrieved baggage restrictions from the remote source.
func (m *RestrictionManager) isReady() bool {
m.mux.RLock()
defer m.mux.RUnlock()
return m.initialized
}
// GetRestriction implements RestrictionManager#GetRestriction.
func (m *RestrictionManager) GetRestriction(service, key string) *baggage.Restriction {
m.mux.RLock()
defer m.mux.RUnlock()
if !m.initialized {
if m.denyBaggageOnInitializationFailure {
return m.invalidRestriction
}
return m.validRestriction
}
if restriction, ok := m.restrictions[key]; ok {
return restriction
}
return m.invalidRestriction
}
// Close stops remote polling and closes the RemoteRestrictionManager.
func (m *RestrictionManager) Close() error {
close(m.stopPoll)
m.pollStopped.Wait()
return nil
}
func (m *RestrictionManager) pollManager() {
defer m.pollStopped.Done()
// attempt to initialize baggage restrictions
if err := m.updateRestrictions(); err != nil {
m.logger.Error(fmt.Sprintf("Failed to initialize baggage restrictions: %s", err.Error()))
}
ticker := time.NewTicker(m.refreshInterval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
if err := m.updateRestrictions(); err != nil {
m.logger.Error(fmt.Sprintf("Failed to update baggage restrictions: %s", err.Error()))
}
case <-m.stopPoll:
return
}
}
}
func (m *RestrictionManager) updateRestrictions() error {
restrictions, err := m.thriftProxy.GetBaggageRestrictions(m.serviceName)
if err != nil {
m.metrics.BaggageRestrictionsUpdateFailure.Inc(1)
return err
}
newRestrictions := m.parseRestrictions(restrictions)
m.metrics.BaggageRestrictionsUpdateSuccess.Inc(1)
m.mux.Lock()
defer m.mux.Unlock()
m.initialized = true
m.restrictions = newRestrictions
return nil
}
func (m *RestrictionManager) parseRestrictions(restrictions []*thrift.BaggageRestriction) map[string]*baggage.Restriction {
setters := make(map[string]*baggage.Restriction, len(restrictions))
for _, restriction := range restrictions {
setters[restriction.BaggageKey] = baggage.NewRestriction(true, int(restriction.MaxValueLength))
}
return setters
}

71
vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package baggage
const (
defaultMaxValueLength = 2048
)
// Restriction determines whether a baggage key is allowed and contains any restrictions on the baggage value.
type Restriction struct {
keyAllowed bool
maxValueLength int
}
// NewRestriction returns a new Restriction.
func NewRestriction(keyAllowed bool, maxValueLength int) *Restriction {
return &Restriction{
keyAllowed: keyAllowed,
maxValueLength: maxValueLength,
}
}
// KeyAllowed returns whether the baggage key for this restriction is allowed.
func (r *Restriction) KeyAllowed() bool {
return r.keyAllowed
}
// MaxValueLength returns the max length for the baggage value.
func (r *Restriction) MaxValueLength() int {
return r.maxValueLength
}
// RestrictionManager keeps track of valid baggage keys and their restrictions. The manager
// will return a Restriction for a specific baggage key which will determine whether the baggage
// key is allowed for the current service and any other applicable restrictions on the baggage
// value.
type RestrictionManager interface {
GetRestriction(service, key string) *Restriction
}
// DefaultRestrictionManager allows any baggage key.
type DefaultRestrictionManager struct {
defaultRestriction *Restriction
}
// NewDefaultRestrictionManager returns a DefaultRestrictionManager.
func NewDefaultRestrictionManager(maxValueLength int) *DefaultRestrictionManager {
if maxValueLength == 0 {
maxValueLength = defaultMaxValueLength
}
return &DefaultRestrictionManager{
defaultRestriction: &Restriction{keyAllowed: true, maxValueLength: maxValueLength},
}
}
// GetRestriction implements RestrictionManager#GetRestriction.
func (m *DefaultRestrictionManager) GetRestriction(service, key string) *Restriction {
return m.defaultRestriction
}

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vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package spanlog
import (
"encoding/json"
"fmt"
"github.com/opentracing/opentracing-go/log"
)
type fieldsAsMap map[string]string
// MaterializeWithJSON converts log Fields into JSON string
// TODO refactor into pluggable materializer
func MaterializeWithJSON(logFields []log.Field) ([]byte, error) {
fields := fieldsAsMap(make(map[string]string, len(logFields)))
for _, field := range logFields {
field.Marshal(fields)
}
if event, ok := fields["event"]; ok && len(fields) == 1 {
return []byte(event), nil
}
return json.Marshal(fields)
}
func (ml fieldsAsMap) EmitString(key, value string) {
ml[key] = value
}
func (ml fieldsAsMap) EmitBool(key string, value bool) {
ml[key] = fmt.Sprintf("%t", value)
}
func (ml fieldsAsMap) EmitInt(key string, value int) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitInt32(key string, value int32) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitInt64(key string, value int64) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitUint32(key string, value uint32) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitUint64(key string, value uint64) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitFloat32(key string, value float32) {
ml[key] = fmt.Sprintf("%f", value)
}
func (ml fieldsAsMap) EmitFloat64(key string, value float64) {
ml[key] = fmt.Sprintf("%f", value)
}
func (ml fieldsAsMap) EmitObject(key string, value interface{}) {
ml[key] = fmt.Sprintf("%+v", value)
}
func (ml fieldsAsMap) EmitLazyLogger(value log.LazyLogger) {
value(ml)
}

99
vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go generated vendored Normal file
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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"time"
"github.com/uber/jaeger-client-go"
)
const (
defaultHostPort = "localhost:5778"
defaultRefreshInterval = time.Second * 5
)
// Option is a function that sets some option on the Throttler
type Option func(options *options)
// Options is a factory for all available options
var Options options
type options struct {
metrics *jaeger.Metrics
logger jaeger.Logger
hostPort string
refreshInterval time.Duration
synchronousInitialization bool
}
// Metrics creates an Option that initializes Metrics on the Throttler, which is used to emit statistics.
func (options) Metrics(m *jaeger.Metrics) Option {
return func(o *options) {
o.metrics = m
}
}
// Logger creates an Option that sets the logger used by the Throttler.
func (options) Logger(logger jaeger.Logger) Option {
return func(o *options) {
o.logger = logger
}
}
// HostPort creates an Option that sets the hostPort of the local agent that keeps track of credits.
func (options) HostPort(hostPort string) Option {
return func(o *options) {
o.hostPort = hostPort
}
}
// RefreshInterval creates an Option that sets how often the Throttler will poll local agent for
// credits.
func (options) RefreshInterval(refreshInterval time.Duration) Option {
return func(o *options) {
o.refreshInterval = refreshInterval
}
}
// SynchronousInitialization creates an Option that determines whether the throttler should synchronously
// fetch credits from the agent when an operation is seen for the first time. This should be set to true
// if the client will be used by a short lived service that needs to ensure that credits are fetched upfront
// such that sampling or throttling occurs.
func (options) SynchronousInitialization(b bool) Option {
return func(o *options) {
o.synchronousInitialization = b
}
}
func applyOptions(o ...Option) options {
opts := options{}
for _, option := range o {
option(&opts)
}
if opts.metrics == nil {
opts.metrics = jaeger.NewNullMetrics()
}
if opts.logger == nil {
opts.logger = jaeger.NullLogger
}
if opts.hostPort == "" {
opts.hostPort = defaultHostPort
}
if opts.refreshInterval == 0 {
opts.refreshInterval = defaultRefreshInterval
}
return opts
}

216
vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go generated vendored Normal file
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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"fmt"
"net/url"
"sync"
"sync/atomic"
"time"
"github.com/pkg/errors"
"github.com/uber/jaeger-client-go"
"github.com/uber/jaeger-client-go/utils"
)
const (
// minimumCredits is the minimum amount of credits necessary to not be throttled.
// i.e. if currentCredits > minimumCredits, then the operation will not be throttled.
minimumCredits = 1.0
)
var (
errorUUIDNotSet = errors.New("Throttler UUID must be set")
)
type operationBalance struct {
Operation string `json:"operation"`
Balance float64 `json:"balance"`
}
type creditResponse struct {
Balances []operationBalance `json:"balances"`
}
type httpCreditManagerProxy struct {
hostPort string
}
func newHTTPCreditManagerProxy(hostPort string) *httpCreditManagerProxy {
return &httpCreditManagerProxy{
hostPort: hostPort,
}
}
// N.B. Operations list must not be empty.
func (m *httpCreditManagerProxy) FetchCredits(uuid, serviceName string, operations []string) (*creditResponse, error) {
params := url.Values{}
params.Set("service", serviceName)
params.Set("uuid", uuid)
for _, op := range operations {
params.Add("operations", op)
}
var resp creditResponse
if err := utils.GetJSON(fmt.Sprintf("http://%s/credits?%s", m.hostPort, params.Encode()), &resp); err != nil {
return nil, errors.Wrap(err, "Failed to receive credits from agent")
}
return &resp, nil
}
// Throttler retrieves credits from agent and uses it to throttle operations.
type Throttler struct {
options
mux sync.RWMutex
service string
uuid atomic.Value
creditManager *httpCreditManagerProxy
credits map[string]float64 // map of operation->credits
close chan struct{}
stopped sync.WaitGroup
}
// NewThrottler returns a Throttler that polls agent for credits and uses them to throttle
// the service.
func NewThrottler(service string, options ...Option) *Throttler {
opts := applyOptions(options...)
creditManager := newHTTPCreditManagerProxy(opts.hostPort)
t := &Throttler{
options: opts,
creditManager: creditManager,
service: service,
credits: make(map[string]float64),
close: make(chan struct{}),
}
t.stopped.Add(1)
go t.pollManager()
return t
}
// IsAllowed implements Throttler#IsAllowed.
func (t *Throttler) IsAllowed(operation string) bool {
t.mux.Lock()
defer t.mux.Unlock()
value, ok := t.credits[operation]
if !ok || value == 0 {
if !ok {
// NOTE: This appears to be a no-op at first glance, but it stores
// the operation key in the map. Necessary for functionality of
// Throttler#operations method.
t.credits[operation] = 0
}
if !t.synchronousInitialization {
t.metrics.ThrottledDebugSpans.Inc(1)
return false
}
// If it is the first time this operation is being checked, synchronously fetch
// the credits.
credits, err := t.fetchCredits([]string{operation})
if err != nil {
// Failed to receive credits from agent, try again next time
t.logger.Error("Failed to fetch credits: " + err.Error())
return false
}
if len(credits.Balances) == 0 {
// This shouldn't happen but just in case
return false
}
for _, opBalance := range credits.Balances {
t.credits[opBalance.Operation] += opBalance.Balance
}
}
return t.isAllowed(operation)
}
// Close stops the throttler from fetching credits from remote.
func (t *Throttler) Close() error {
close(t.close)
t.stopped.Wait()
return nil
}
// SetProcess implements ProcessSetter#SetProcess. It's imperative that the UUID is set before any remote
// requests are made.
func (t *Throttler) SetProcess(process jaeger.Process) {
if process.UUID != "" {
t.uuid.Store(process.UUID)
}
}
// N.B. This function must be called with the Write Lock
func (t *Throttler) isAllowed(operation string) bool {
credits := t.credits[operation]
if credits < minimumCredits {
t.metrics.ThrottledDebugSpans.Inc(1)
return false
}
t.credits[operation] = credits - minimumCredits
return true
}
func (t *Throttler) pollManager() {
defer t.stopped.Done()
ticker := time.NewTicker(t.refreshInterval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
t.refreshCredits()
case <-t.close:
return
}
}
}
func (t *Throttler) operations() []string {
t.mux.RLock()
defer t.mux.RUnlock()
operations := make([]string, 0, len(t.credits))
for op := range t.credits {
operations = append(operations, op)
}
return operations
}
func (t *Throttler) refreshCredits() {
operations := t.operations()
if len(operations) == 0 {
return
}
newCredits, err := t.fetchCredits(operations)
if err != nil {
t.metrics.ThrottlerUpdateFailure.Inc(1)
t.logger.Error("Failed to fetch credits: " + err.Error())
return
}
t.metrics.ThrottlerUpdateSuccess.Inc(1)
t.mux.Lock()
defer t.mux.Unlock()
for _, opBalance := range newCredits.Balances {
t.credits[opBalance.Operation] += opBalance.Balance
}
}
func (t *Throttler) fetchCredits(operations []string) (*creditResponse, error) {
uuid := t.uuid.Load()
uuidStr, _ := uuid.(string)
if uuid == nil || uuidStr == "" {
return nil, errorUUIDNotSet
}
return t.creditManager.FetchCredits(uuidStr, t.service, operations)
}

32
vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go generated vendored Normal file
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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package throttler
// Throttler is used to rate limits operations. For example, given how debug spans
// are always sampled, a throttler can be enabled per client to rate limit the amount
// of debug spans a client can start.
type Throttler interface {
// IsAllowed determines whether the operation should be allowed and not be
// throttled.
IsAllowed(operation string) bool
}
// DefaultThrottler doesn't throttle at all.
type DefaultThrottler struct{}
// IsAllowed implements Throttler#IsAllowed.
func (t DefaultThrottler) IsAllowed(operation string) bool {
return true
}

55
vendor/github.com/uber/jaeger-client-go/interop.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"github.com/opentracing/opentracing-go"
)
// TODO this file should not be needed after TChannel PR.
type formatKey int
// SpanContextFormat is a constant used as OpenTracing Format.
// Requires *SpanContext as carrier.
// This format is intended for interop with TChannel or other Zipkin-like tracers.
const SpanContextFormat formatKey = iota
type jaegerTraceContextPropagator struct {
tracer *Tracer
}
func (p *jaegerTraceContextPropagator) Inject(
ctx SpanContext,
abstractCarrier interface{},
) error {
carrier, ok := abstractCarrier.(*SpanContext)
if !ok {
return opentracing.ErrInvalidCarrier
}
carrier.CopyFrom(&ctx)
return nil
}
func (p *jaegerTraceContextPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
carrier, ok := abstractCarrier.(*SpanContext)
if !ok {
return emptyContext, opentracing.ErrInvalidCarrier
}
ctx := new(SpanContext)
ctx.CopyFrom(carrier)
return *ctx, nil
}

84
vendor/github.com/uber/jaeger-client-go/jaeger_tag.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"fmt"
"github.com/opentracing/opentracing-go/log"
j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
)
type tags []*j.Tag
// ConvertLogsToJaegerTags converts log Fields into jaeger tags.
func ConvertLogsToJaegerTags(logFields []log.Field) []*j.Tag {
fields := tags(make([]*j.Tag, 0, len(logFields)))
for _, field := range logFields {
field.Marshal(&fields)
}
return fields
}
func (t *tags) EmitString(key, value string) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &value})
}
func (t *tags) EmitBool(key string, value bool) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_BOOL, VBool: &value})
}
func (t *tags) EmitInt(key string, value int) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitInt32(key string, value int32) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitInt64(key string, value int64) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &value})
}
func (t *tags) EmitUint32(key string, value uint32) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitUint64(key string, value uint64) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitFloat32(key string, value float32) {
vDouble := float64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &vDouble})
}
func (t *tags) EmitFloat64(key string, value float64) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &value})
}
func (t *tags) EmitObject(key string, value interface{}) {
vStr := fmt.Sprintf("%+v", value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &vStr})
}
func (t *tags) EmitLazyLogger(value log.LazyLogger) {
value(t)
}

179
vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"time"
"github.com/opentracing/opentracing-go"
j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
"github.com/uber/jaeger-client-go/utils"
)
// BuildJaegerThrift builds jaeger span based on internal span.
func BuildJaegerThrift(span *Span) *j.Span {
span.Lock()
defer span.Unlock()
startTime := utils.TimeToMicrosecondsSinceEpochInt64(span.startTime)
duration := span.duration.Nanoseconds() / int64(time.Microsecond)
jaegerSpan := &j.Span{
TraceIdLow: int64(span.context.traceID.Low),
TraceIdHigh: int64(span.context.traceID.High),
SpanId: int64(span.context.spanID),
ParentSpanId: int64(span.context.parentID),
OperationName: span.operationName,
Flags: int32(span.context.flags),
StartTime: startTime,
Duration: duration,
Tags: buildTags(span.tags, span.tracer.options.maxTagValueLength),
Logs: buildLogs(span.logs),
References: buildReferences(span.references),
}
return jaegerSpan
}
// BuildJaegerProcessThrift creates a thrift Process type.
func BuildJaegerProcessThrift(span *Span) *j.Process {
span.Lock()
defer span.Unlock()
return buildJaegerProcessThrift(span.tracer)
}
func buildJaegerProcessThrift(tracer *Tracer) *j.Process {
process := &j.Process{
ServiceName: tracer.serviceName,
Tags: buildTags(tracer.tags, tracer.options.maxTagValueLength),
}
if tracer.process.UUID != "" {
process.Tags = append(process.Tags, &j.Tag{Key: TracerUUIDTagKey, VStr: &tracer.process.UUID, VType: j.TagType_STRING})
}
return process
}
func buildTags(tags []Tag, maxTagValueLength int) []*j.Tag {
jTags := make([]*j.Tag, 0, len(tags))
for _, tag := range tags {
jTag := buildTag(&tag, maxTagValueLength)
jTags = append(jTags, jTag)
}
return jTags
}
func buildLogs(logs []opentracing.LogRecord) []*j.Log {
jLogs := make([]*j.Log, 0, len(logs))
for _, log := range logs {
jLog := &j.Log{
Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(log.Timestamp),
Fields: ConvertLogsToJaegerTags(log.Fields),
}
jLogs = append(jLogs, jLog)
}
return jLogs
}
func buildTag(tag *Tag, maxTagValueLength int) *j.Tag {
jTag := &j.Tag{Key: tag.key}
switch value := tag.value.(type) {
case string:
vStr := truncateString(value, maxTagValueLength)
jTag.VStr = &vStr
jTag.VType = j.TagType_STRING
case []byte:
if len(value) > maxTagValueLength {
value = value[:maxTagValueLength]
}
jTag.VBinary = value
jTag.VType = j.TagType_BINARY
case int:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int8:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint8:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int16:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint16:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int32:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint32:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int64:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint64:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case float32:
vDouble := float64(value)
jTag.VDouble = &vDouble
jTag.VType = j.TagType_DOUBLE
case float64:
vDouble := float64(value)
jTag.VDouble = &vDouble
jTag.VType = j.TagType_DOUBLE
case bool:
vBool := value
jTag.VBool = &vBool
jTag.VType = j.TagType_BOOL
default:
vStr := truncateString(stringify(value), maxTagValueLength)
jTag.VStr = &vStr
jTag.VType = j.TagType_STRING
}
return jTag
}
func buildReferences(references []Reference) []*j.SpanRef {
retMe := make([]*j.SpanRef, 0, len(references))
for _, ref := range references {
if ref.Type == opentracing.ChildOfRef {
retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_CHILD_OF))
} else if ref.Type == opentracing.FollowsFromRef {
retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_FOLLOWS_FROM))
}
}
return retMe
}
func spanRef(ctx SpanContext, refType j.SpanRefType) *j.SpanRef {
return &j.SpanRef{
RefType: refType,
TraceIdLow: int64(ctx.traceID.Low),
TraceIdHigh: int64(ctx.traceID.High),
SpanId: int64(ctx.spanID),
}
}

90
vendor/github.com/uber/jaeger-client-go/log/logger.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package log
import (
"bytes"
"fmt"
"log"
"sync"
)
// Logger provides an abstract interface for logging from Reporters.
// Applications can provide their own implementation of this interface to adapt
// reporters logging to whatever logging library they prefer (stdlib log,
// logrus, go-logging, etc).
type Logger interface {
// Error logs a message at error priority
Error(msg string)
// Infof logs a message at info priority
Infof(msg string, args ...interface{})
}
// StdLogger is implementation of the Logger interface that delegates to default `log` package
var StdLogger = &stdLogger{}
type stdLogger struct{}
func (l *stdLogger) Error(msg string) {
log.Printf("ERROR: %s", msg)
}
// Infof logs a message at info priority
func (l *stdLogger) Infof(msg string, args ...interface{}) {
log.Printf(msg, args...)
}
// NullLogger is implementation of the Logger interface that is no-op
var NullLogger = &nullLogger{}
type nullLogger struct{}
func (l *nullLogger) Error(msg string) {}
func (l *nullLogger) Infof(msg string, args ...interface{}) {}
// BytesBufferLogger implements Logger backed by a bytes.Buffer.
type BytesBufferLogger struct {
mux sync.Mutex
buf bytes.Buffer
}
// Error implements Logger.
func (l *BytesBufferLogger) Error(msg string) {
l.mux.Lock()
l.buf.WriteString(fmt.Sprintf("ERROR: %s\n", msg))
l.mux.Unlock()
}
// Infof implements Logger.
func (l *BytesBufferLogger) Infof(msg string, args ...interface{}) {
l.mux.Lock()
l.buf.WriteString("INFO: " + fmt.Sprintf(msg, args...) + "\n")
l.mux.Unlock()
}
// String returns string representation of the underlying buffer.
func (l *BytesBufferLogger) String() string {
l.mux.Lock()
defer l.mux.Unlock()
return l.buf.String()
}
// Flush empties the underlying buffer.
func (l *BytesBufferLogger) Flush() {
l.mux.Lock()
defer l.mux.Unlock()
l.buf.Reset()
}

53
vendor/github.com/uber/jaeger-client-go/logger.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import "log"
// NB This will be deprecated in 3.0.0, please use jaeger-client-go/log/logger instead.
// Logger provides an abstract interface for logging from Reporters.
// Applications can provide their own implementation of this interface to adapt
// reporters logging to whatever logging library they prefer (stdlib log,
// logrus, go-logging, etc).
type Logger interface {
// Error logs a message at error priority
Error(msg string)
// Infof logs a message at info priority
Infof(msg string, args ...interface{})
}
// StdLogger is implementation of the Logger interface that delegates to default `log` package
var StdLogger = &stdLogger{}
type stdLogger struct{}
func (l *stdLogger) Error(msg string) {
log.Printf("ERROR: %s", msg)
}
// Infof logs a message at info priority
func (l *stdLogger) Infof(msg string, args ...interface{}) {
log.Printf(msg, args...)
}
// NullLogger is implementation of the Logger interface that delegates to default `log` package
var NullLogger = &nullLogger{}
type nullLogger struct{}
func (l *nullLogger) Error(msg string) {}
func (l *nullLogger) Infof(msg string, args ...interface{}) {}

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// Copyright (c) 2017-2018 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"github.com/uber/jaeger-lib/metrics"
)
// Metrics is a container of all stats emitted by Jaeger tracer.
type Metrics struct {
// Number of traces started by this tracer as sampled
TracesStartedSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=y"`
// Number of traces started by this tracer as not sampled
TracesStartedNotSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=n"`
// Number of externally started sampled traces this tracer joined
TracesJoinedSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=y"`
// Number of externally started not-sampled traces this tracer joined
TracesJoinedNotSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=n"`
// Number of sampled spans started by this tracer
SpansStartedSampled metrics.Counter `metric:"started_spans" tags:"sampled=y"`
// Number of unsampled spans started by this tracer
SpansStartedNotSampled metrics.Counter `metric:"started_spans" tags:"sampled=n"`
// Number of spans finished by this tracer
SpansFinished metrics.Counter `metric:"finished_spans"`
// Number of errors decoding tracing context
DecodingErrors metrics.Counter `metric:"span_context_decoding_errors"`
// Number of spans successfully reported
ReporterSuccess metrics.Counter `metric:"reporter_spans" tags:"result=ok"`
// Number of spans not reported due to a Sender failure
ReporterFailure metrics.Counter `metric:"reporter_spans" tags:"result=err"`
// Number of spans dropped due to internal queue overflow
ReporterDropped metrics.Counter `metric:"reporter_spans" tags:"result=dropped"`
// Current number of spans in the reporter queue
ReporterQueueLength metrics.Gauge `metric:"reporter_queue_length"`
// Number of times the Sampler succeeded to retrieve sampling strategy
SamplerRetrieved metrics.Counter `metric:"sampler_queries" tags:"result=ok"`
// Number of times the Sampler failed to retrieve sampling strategy
SamplerQueryFailure metrics.Counter `metric:"sampler_queries" tags:"result=err"`
// Number of times the Sampler succeeded to retrieve and update sampling strategy
SamplerUpdated metrics.Counter `metric:"sampler_updates" tags:"result=ok"`
// Number of times the Sampler failed to update sampling strategy
SamplerUpdateFailure metrics.Counter `metric:"sampler_updates" tags:"result=err"`
// Number of times baggage was successfully written or updated on spans.
BaggageUpdateSuccess metrics.Counter `metric:"baggage_updates" tags:"result=ok"`
// Number of times baggage failed to write or update on spans.
BaggageUpdateFailure metrics.Counter `metric:"baggage_updates" tags:"result=err"`
// Number of times baggage was truncated as per baggage restrictions.
BaggageTruncate metrics.Counter `metric:"baggage_truncations"`
// Number of times baggage restrictions were successfully updated.
BaggageRestrictionsUpdateSuccess metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=ok"`
// Number of times baggage restrictions failed to update.
BaggageRestrictionsUpdateFailure metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=err"`
// Number of times debug spans were throttled.
ThrottledDebugSpans metrics.Counter `metric:"throttled_debug_spans"`
// Number of times throttler successfully updated.
ThrottlerUpdateSuccess metrics.Counter `metric:"throttler_updates" tags:"result=ok"`
// Number of times throttler failed to update.
ThrottlerUpdateFailure metrics.Counter `metric:"throttler_updates" tags:"result=err"`
}
// NewMetrics creates a new Metrics struct and initializes it.
func NewMetrics(factory metrics.Factory, globalTags map[string]string) *Metrics {
m := &Metrics{}
// TODO the namespace "jaeger" should be configurable (e.g. in all-in-one "jaeger-client" would make more sense)
metrics.Init(m, factory.Namespace("jaeger", nil), globalTags)
return m
}
// NewNullMetrics creates a new Metrics struct that won't report any metrics.
func NewNullMetrics() *Metrics {
return NewMetrics(metrics.NullFactory, nil)
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import opentracing "github.com/opentracing/opentracing-go"
// Observer can be registered with the Tracer to receive notifications about
// new Spans.
//
// Deprecated: use jaeger.ContribObserver instead.
type Observer interface {
OnStartSpan(operationName string, options opentracing.StartSpanOptions) SpanObserver
}
// SpanObserver is created by the Observer and receives notifications about
// other Span events.
//
// Deprecated: use jaeger.ContribSpanObserver instead.
type SpanObserver interface {
OnSetOperationName(operationName string)
OnSetTag(key string, value interface{})
OnFinish(options opentracing.FinishOptions)
}
// compositeObserver is a dispatcher to other observers
type compositeObserver struct {
observers []ContribObserver
}
// compositeSpanObserver is a dispatcher to other span observers
type compositeSpanObserver struct {
observers []ContribSpanObserver
}
// noopSpanObserver is used when there are no observers registered
// on the Tracer or none of them returns span observers from OnStartSpan.
var noopSpanObserver = &compositeSpanObserver{}
func (o *compositeObserver) append(contribObserver ContribObserver) {
o.observers = append(o.observers, contribObserver)
}
func (o *compositeObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) ContribSpanObserver {
var spanObservers []ContribSpanObserver
for _, obs := range o.observers {
spanObs, ok := obs.OnStartSpan(sp, operationName, options)
if ok {
if spanObservers == nil {
spanObservers = make([]ContribSpanObserver, 0, len(o.observers))
}
spanObservers = append(spanObservers, spanObs)
}
}
if len(spanObservers) == 0 {
return noopSpanObserver
}
return &compositeSpanObserver{observers: spanObservers}
}
func (o *compositeSpanObserver) OnSetOperationName(operationName string) {
for _, obs := range o.observers {
obs.OnSetOperationName(operationName)
}
}
func (o *compositeSpanObserver) OnSetTag(key string, value interface{}) {
for _, obs := range o.observers {
obs.OnSetTag(key, value)
}
}
func (o *compositeSpanObserver) OnFinish(options opentracing.FinishOptions) {
for _, obs := range o.observers {
obs.OnFinish(options)
}
}

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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
// Process holds process specific metadata that's relevant to this client.
type Process struct {
Service string
UUID string
Tags []Tag
}
// ProcessSetter sets a process. This can be used by any class that requires
// the process to be set as part of initialization.
// See internal/throttler/remote/throttler.go for an example.
type ProcessSetter interface {
SetProcess(process Process)
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"bytes"
"encoding/binary"
"fmt"
"io"
"log"
"net/url"
"strings"
"sync"
opentracing "github.com/opentracing/opentracing-go"
)
// Injector is responsible for injecting SpanContext instances in a manner suitable
// for propagation via a format-specific "carrier" object. Typically the
// injection will take place across an RPC boundary, but message queues and
// other IPC mechanisms are also reasonable places to use an Injector.
type Injector interface {
// Inject takes `SpanContext` and injects it into `carrier`. The actual type
// of `carrier` depends on the `format` passed to `Tracer.Inject()`.
//
// Implementations may return opentracing.ErrInvalidCarrier or any other
// implementation-specific error if injection fails.
Inject(ctx SpanContext, carrier interface{}) error
}
// Extractor is responsible for extracting SpanContext instances from a
// format-specific "carrier" object. Typically the extraction will take place
// on the server side of an RPC boundary, but message queues and other IPC
// mechanisms are also reasonable places to use an Extractor.
type Extractor interface {
// Extract decodes a SpanContext instance from the given `carrier`,
// or (nil, opentracing.ErrSpanContextNotFound) if no context could
// be found in the `carrier`.
Extract(carrier interface{}) (SpanContext, error)
}
type textMapPropagator struct {
headerKeys *HeadersConfig
metrics Metrics
encodeValue func(string) string
decodeValue func(string) string
}
func newTextMapPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMapPropagator {
return &textMapPropagator{
headerKeys: headerKeys,
metrics: metrics,
encodeValue: func(val string) string {
return val
},
decodeValue: func(val string) string {
return val
},
}
}
func newHTTPHeaderPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMapPropagator {
return &textMapPropagator{
headerKeys: headerKeys,
metrics: metrics,
encodeValue: func(val string) string {
return url.QueryEscape(val)
},
decodeValue: func(val string) string {
// ignore decoding errors, cannot do anything about them
if v, err := url.QueryUnescape(val); err == nil {
return v
}
return val
},
}
}
type binaryPropagator struct {
tracer *Tracer
buffers sync.Pool
}
func newBinaryPropagator(tracer *Tracer) *binaryPropagator {
return &binaryPropagator{
tracer: tracer,
buffers: sync.Pool{New: func() interface{} { return &bytes.Buffer{} }},
}
}
func (p *textMapPropagator) Inject(
sc SpanContext,
abstractCarrier interface{},
) error {
textMapWriter, ok := abstractCarrier.(opentracing.TextMapWriter)
if !ok {
return opentracing.ErrInvalidCarrier
}
// Do not encode the string with trace context to avoid accidental double-encoding
// if people are using opentracing < 0.10.0. Our colon-separated representation
// of the trace context is already safe for HTTP headers.
textMapWriter.Set(p.headerKeys.TraceContextHeaderName, sc.String())
for k, v := range sc.baggage {
safeKey := p.addBaggageKeyPrefix(k)
safeVal := p.encodeValue(v)
textMapWriter.Set(safeKey, safeVal)
}
return nil
}
func (p *textMapPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
textMapReader, ok := abstractCarrier.(opentracing.TextMapReader)
if !ok {
return emptyContext, opentracing.ErrInvalidCarrier
}
var ctx SpanContext
var baggage map[string]string
err := textMapReader.ForeachKey(func(rawKey, value string) error {
key := strings.ToLower(rawKey) // TODO not necessary for plain TextMap
if key == p.headerKeys.TraceContextHeaderName {
var err error
safeVal := p.decodeValue(value)
if ctx, err = ContextFromString(safeVal); err != nil {
return err
}
} else if key == p.headerKeys.JaegerDebugHeader {
ctx.debugID = p.decodeValue(value)
} else if key == p.headerKeys.JaegerBaggageHeader {
if baggage == nil {
baggage = make(map[string]string)
}
for k, v := range p.parseCommaSeparatedMap(value) {
baggage[k] = v
}
} else if strings.HasPrefix(key, p.headerKeys.TraceBaggageHeaderPrefix) {
if baggage == nil {
baggage = make(map[string]string)
}
safeKey := p.removeBaggageKeyPrefix(key)
safeVal := p.decodeValue(value)
baggage[safeKey] = safeVal
}
return nil
})
if err != nil {
p.metrics.DecodingErrors.Inc(1)
return emptyContext, err
}
if !ctx.traceID.IsValid() && ctx.debugID == "" && len(baggage) == 0 {
return emptyContext, opentracing.ErrSpanContextNotFound
}
ctx.baggage = baggage
return ctx, nil
}
func (p *binaryPropagator) Inject(
sc SpanContext,
abstractCarrier interface{},
) error {
carrier, ok := abstractCarrier.(io.Writer)
if !ok {
return opentracing.ErrInvalidCarrier
}
// Handle the tracer context
if err := binary.Write(carrier, binary.BigEndian, sc.traceID); err != nil {
return err
}
if err := binary.Write(carrier, binary.BigEndian, sc.spanID); err != nil {
return err
}
if err := binary.Write(carrier, binary.BigEndian, sc.parentID); err != nil {
return err
}
if err := binary.Write(carrier, binary.BigEndian, sc.flags); err != nil {
return err
}
// Handle the baggage items
if err := binary.Write(carrier, binary.BigEndian, int32(len(sc.baggage))); err != nil {
return err
}
for k, v := range sc.baggage {
if err := binary.Write(carrier, binary.BigEndian, int32(len(k))); err != nil {
return err
}
io.WriteString(carrier, k)
if err := binary.Write(carrier, binary.BigEndian, int32(len(v))); err != nil {
return err
}
io.WriteString(carrier, v)
}
return nil
}
func (p *binaryPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
carrier, ok := abstractCarrier.(io.Reader)
if !ok {
return emptyContext, opentracing.ErrInvalidCarrier
}
var ctx SpanContext
if err := binary.Read(carrier, binary.BigEndian, &ctx.traceID); err != nil {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
if err := binary.Read(carrier, binary.BigEndian, &ctx.spanID); err != nil {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
if err := binary.Read(carrier, binary.BigEndian, &ctx.parentID); err != nil {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
if err := binary.Read(carrier, binary.BigEndian, &ctx.flags); err != nil {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
// Handle the baggage items
var numBaggage int32
if err := binary.Read(carrier, binary.BigEndian, &numBaggage); err != nil {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
if iNumBaggage := int(numBaggage); iNumBaggage > 0 {
ctx.baggage = make(map[string]string, iNumBaggage)
buf := p.buffers.Get().(*bytes.Buffer)
defer p.buffers.Put(buf)
var keyLen, valLen int32
for i := 0; i < iNumBaggage; i++ {
if err := binary.Read(carrier, binary.BigEndian, &keyLen); err != nil {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
buf.Reset()
buf.Grow(int(keyLen))
if n, err := io.CopyN(buf, carrier, int64(keyLen)); err != nil || int32(n) != keyLen {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
key := buf.String()
if err := binary.Read(carrier, binary.BigEndian, &valLen); err != nil {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
buf.Reset()
buf.Grow(int(valLen))
if n, err := io.CopyN(buf, carrier, int64(valLen)); err != nil || int32(n) != valLen {
return emptyContext, opentracing.ErrSpanContextCorrupted
}
ctx.baggage[key] = buf.String()
}
}
return ctx, nil
}
// Converts a comma separated key value pair list into a map
// e.g. key1=value1, key2=value2, key3 = value3
// is converted to map[string]string { "key1" : "value1",
// "key2" : "value2",
// "key3" : "value3" }
func (p *textMapPropagator) parseCommaSeparatedMap(value string) map[string]string {
baggage := make(map[string]string)
value, err := url.QueryUnescape(value)
if err != nil {
log.Printf("Unable to unescape %s, %v", value, err)
return baggage
}
for _, kvpair := range strings.Split(value, ",") {
kv := strings.Split(strings.TrimSpace(kvpair), "=")
if len(kv) == 2 {
baggage[kv[0]] = kv[1]
} else {
log.Printf("Malformed value passed in for %s", p.headerKeys.JaegerBaggageHeader)
}
}
return baggage
}
// Converts a baggage item key into an http header format,
// by prepending TraceBaggageHeaderPrefix and encoding the key string
func (p *textMapPropagator) addBaggageKeyPrefix(key string) string {
// TODO encodeBaggageKeyAsHeader add caching and escaping
return fmt.Sprintf("%v%v", p.headerKeys.TraceBaggageHeaderPrefix, key)
}
func (p *textMapPropagator) removeBaggageKeyPrefix(key string) string {
// TODO decodeBaggageHeaderKey add caching and escaping
return key[len(p.headerKeys.TraceBaggageHeaderPrefix):]
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import "github.com/opentracing/opentracing-go"
// Reference represents a causal reference to other Spans (via their SpanContext).
type Reference struct {
Type opentracing.SpanReferenceType
Context SpanContext
}

289
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"fmt"
"sync"
"sync/atomic"
"time"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go/log"
)
// Reporter is called by the tracer when a span is completed to report the span to the tracing collector.
type Reporter interface {
// Report submits a new span to collectors, possibly asynchronously and/or with buffering.
Report(span *Span)
// Close does a clean shutdown of the reporter, flushing any traces that may be buffered in memory.
Close()
}
// ------------------------------
type nullReporter struct{}
// NewNullReporter creates a no-op reporter that ignores all reported spans.
func NewNullReporter() Reporter {
return &nullReporter{}
}
// Report implements Report() method of Reporter by doing nothing.
func (r *nullReporter) Report(span *Span) {
// no-op
}
// Close implements Close() method of Reporter by doing nothing.
func (r *nullReporter) Close() {
// no-op
}
// ------------------------------
type loggingReporter struct {
logger Logger
}
// NewLoggingReporter creates a reporter that logs all reported spans to provided logger.
func NewLoggingReporter(logger Logger) Reporter {
return &loggingReporter{logger}
}
// Report implements Report() method of Reporter by logging the span to the logger.
func (r *loggingReporter) Report(span *Span) {
r.logger.Infof("Reporting span %+v", span)
}
// Close implements Close() method of Reporter by doing nothing.
func (r *loggingReporter) Close() {
// no-op
}
// ------------------------------
// InMemoryReporter is used for testing, and simply collects spans in memory.
type InMemoryReporter struct {
spans []opentracing.Span
lock sync.Mutex
}
// NewInMemoryReporter creates a reporter that stores spans in memory.
// NOTE: the Tracer should be created with options.PoolSpans = false.
func NewInMemoryReporter() *InMemoryReporter {
return &InMemoryReporter{
spans: make([]opentracing.Span, 0, 10),
}
}
// Report implements Report() method of Reporter by storing the span in the buffer.
func (r *InMemoryReporter) Report(span *Span) {
r.lock.Lock()
r.spans = append(r.spans, span)
r.lock.Unlock()
}
// Close implements Close() method of Reporter by doing nothing.
func (r *InMemoryReporter) Close() {
// no-op
}
// SpansSubmitted returns the number of spans accumulated in the buffer.
func (r *InMemoryReporter) SpansSubmitted() int {
r.lock.Lock()
defer r.lock.Unlock()
return len(r.spans)
}
// GetSpans returns accumulated spans as a copy of the buffer.
func (r *InMemoryReporter) GetSpans() []opentracing.Span {
r.lock.Lock()
defer r.lock.Unlock()
copied := make([]opentracing.Span, len(r.spans))
copy(copied, r.spans)
return copied
}
// Reset clears all accumulated spans.
func (r *InMemoryReporter) Reset() {
r.lock.Lock()
defer r.lock.Unlock()
r.spans = nil
}
// ------------------------------
type compositeReporter struct {
reporters []Reporter
}
// NewCompositeReporter creates a reporter that ignores all reported spans.
func NewCompositeReporter(reporters ...Reporter) Reporter {
return &compositeReporter{reporters: reporters}
}
// Report implements Report() method of Reporter by delegating to each underlying reporter.
func (r *compositeReporter) Report(span *Span) {
for _, reporter := range r.reporters {
reporter.Report(span)
}
}
// Close implements Close() method of Reporter by closing each underlying reporter.
func (r *compositeReporter) Close() {
for _, reporter := range r.reporters {
reporter.Close()
}
}
// ------------- REMOTE REPORTER -----------------
type reporterQueueItemType int
const (
defaultQueueSize = 100
defaultBufferFlushInterval = 1 * time.Second
reporterQueueItemSpan reporterQueueItemType = iota
reporterQueueItemClose
)
type reporterQueueItem struct {
itemType reporterQueueItemType
span *Span
close *sync.WaitGroup
}
type remoteReporter struct {
// These fields must be first in the struct because `sync/atomic` expects 64-bit alignment.
// Cf. https://github.com/uber/jaeger-client-go/issues/155, https://goo.gl/zW7dgq
queueLength int64
closed int64 // 0 - not closed, 1 - closed
reporterOptions
sender Transport
queue chan reporterQueueItem
}
// NewRemoteReporter creates a new reporter that sends spans out of process by means of Sender.
// Calls to Report(Span) return immediately (side effect: if internal buffer is full the span is dropped).
// Periodically the transport buffer is flushed even if it hasn't reached max packet size.
// Calls to Close() block until all spans reported prior to the call to Close are flushed.
func NewRemoteReporter(sender Transport, opts ...ReporterOption) Reporter {
options := reporterOptions{}
for _, option := range opts {
option(&options)
}
if options.bufferFlushInterval <= 0 {
options.bufferFlushInterval = defaultBufferFlushInterval
}
if options.logger == nil {
options.logger = log.NullLogger
}
if options.metrics == nil {
options.metrics = NewNullMetrics()
}
if options.queueSize <= 0 {
options.queueSize = defaultQueueSize
}
reporter := &remoteReporter{
reporterOptions: options,
sender: sender,
queue: make(chan reporterQueueItem, options.queueSize),
}
go reporter.processQueue()
return reporter
}
// Report implements Report() method of Reporter.
// It passes the span to a background go-routine for submission to Jaeger backend.
// If the internal queue is full, the span is dropped and metrics.ReporterDropped counter is incremented.
// If Report() is called after the reporter has been Close()-ed, the additional spans will not be
// sent to the backend, but the metrics.ReporterDropped counter may not reflect them correctly,
// because some of them may still be successfully added to the queue.
func (r *remoteReporter) Report(span *Span) {
select {
case r.queue <- reporterQueueItem{itemType: reporterQueueItemSpan, span: span}:
atomic.AddInt64(&r.queueLength, 1)
default:
r.metrics.ReporterDropped.Inc(1)
}
}
// Close implements Close() method of Reporter by waiting for the queue to be drained.
func (r *remoteReporter) Close() {
if swapped := atomic.CompareAndSwapInt64(&r.closed, 0, 1); !swapped {
r.logger.Error("Repeated attempt to close the reporter is ignored")
return
}
r.sendCloseEvent()
r.sender.Close()
}
func (r *remoteReporter) sendCloseEvent() {
wg := &sync.WaitGroup{}
wg.Add(1)
item := reporterQueueItem{itemType: reporterQueueItemClose, close: wg}
r.queue <- item // if the queue is full we will block until there is space
atomic.AddInt64(&r.queueLength, 1)
wg.Wait()
}
// processQueue reads spans from the queue, converts them to Thrift, and stores them in an internal buffer.
// When the buffer length reaches batchSize, it is flushed by submitting the accumulated spans to Jaeger.
// Buffer also gets flushed automatically every batchFlushInterval seconds, just in case the tracer stopped
// reporting new spans.
func (r *remoteReporter) processQueue() {
// flush causes the Sender to flush its accumulated spans and clear the buffer
flush := func() {
if flushed, err := r.sender.Flush(); err != nil {
r.metrics.ReporterFailure.Inc(int64(flushed))
r.logger.Error(fmt.Sprintf("error when flushing the buffer: %s", err.Error()))
} else if flushed > 0 {
r.metrics.ReporterSuccess.Inc(int64(flushed))
}
}
timer := time.NewTicker(r.bufferFlushInterval)
for {
select {
case <-timer.C:
flush()
case item := <-r.queue:
atomic.AddInt64(&r.queueLength, -1)
switch item.itemType {
case reporterQueueItemSpan:
span := item.span
if flushed, err := r.sender.Append(span); err != nil {
r.metrics.ReporterFailure.Inc(int64(flushed))
r.logger.Error(fmt.Sprintf("error reporting span %q: %s", span.OperationName(), err.Error()))
} else if flushed > 0 {
r.metrics.ReporterSuccess.Inc(int64(flushed))
// to reduce the number of gauge stats, we only emit queue length on flush
r.metrics.ReporterQueueLength.Update(atomic.LoadInt64(&r.queueLength))
}
case reporterQueueItemClose:
timer.Stop()
flush()
item.close.Done()
return
}
}
}
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"time"
)
// ReporterOption is a function that sets some option on the reporter.
type ReporterOption func(c *reporterOptions)
// ReporterOptions is a factory for all available ReporterOption's
var ReporterOptions reporterOptions
// reporterOptions control behavior of the reporter.
type reporterOptions struct {
// queueSize is the size of internal queue where reported spans are stored before they are processed in the background
queueSize int
// bufferFlushInterval is how often the buffer is force-flushed, even if it's not full
bufferFlushInterval time.Duration
// logger is used to log errors of span submissions
logger Logger
// metrics is used to record runtime stats
metrics *Metrics
}
// QueueSize creates a ReporterOption that sets the size of the internal queue where
// spans are stored before they are processed.
func (reporterOptions) QueueSize(queueSize int) ReporterOption {
return func(r *reporterOptions) {
r.queueSize = queueSize
}
}
// Metrics creates a ReporterOption that initializes Metrics in the reporter,
// which is used to record runtime statistics.
func (reporterOptions) Metrics(metrics *Metrics) ReporterOption {
return func(r *reporterOptions) {
r.metrics = metrics
}
}
// BufferFlushInterval creates a ReporterOption that sets how often the queue
// is force-flushed.
func (reporterOptions) BufferFlushInterval(bufferFlushInterval time.Duration) ReporterOption {
return func(r *reporterOptions) {
r.bufferFlushInterval = bufferFlushInterval
}
}
// Logger creates a ReporterOption that initializes the logger used to log
// errors of span submissions.
func (reporterOptions) Logger(logger Logger) ReporterOption {
return func(r *reporterOptions) {
r.logger = logger
}
}

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An Observer that can be used to emit RPC metrics
================================================
It can be attached to the tracer during tracer construction.
See `ExampleObserver` function in [observer_test.go](./observer_test.go).

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package rpcmetrics implements an Observer that can be used to emit RPC metrics.
package rpcmetrics

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rpcmetrics
import "sync"
// normalizedEndpoints is a cache for endpointName -> safeName mappings.
type normalizedEndpoints struct {
names map[string]string
maxSize int
defaultName string
normalizer NameNormalizer
mux sync.RWMutex
}
func newNormalizedEndpoints(maxSize int, normalizer NameNormalizer) *normalizedEndpoints {
return &normalizedEndpoints{
maxSize: maxSize,
normalizer: normalizer,
names: make(map[string]string, maxSize),
}
}
// normalize looks up the name in the cache, if not found it uses normalizer
// to convert the name to a safe name. If called with more than maxSize unique
// names it returns "" for all other names beyond those already cached.
func (n *normalizedEndpoints) normalize(name string) string {
n.mux.RLock()
norm, ok := n.names[name]
l := len(n.names)
n.mux.RUnlock()
if ok {
return norm
}
if l >= n.maxSize {
return ""
}
return n.normalizeWithLock(name)
}
func (n *normalizedEndpoints) normalizeWithLock(name string) string {
norm := n.normalizer.Normalize(name)
n.mux.Lock()
defer n.mux.Unlock()
// cache may have grown while we were not holding the lock
if len(n.names) >= n.maxSize {
return ""
}
n.names[name] = norm
return norm
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rpcmetrics
import (
"sync"
"github.com/uber/jaeger-lib/metrics"
)
const (
otherEndpointsPlaceholder = "other"
endpointNameMetricTag = "endpoint"
)
// Metrics is a collection of metrics for an endpoint describing
// throughput, success, errors, and performance.
type Metrics struct {
// RequestCountSuccess is a counter of the total number of successes.
RequestCountSuccess metrics.Counter `metric:"requests" tags:"error=false"`
// RequestCountFailures is a counter of the number of times any failure has been observed.
RequestCountFailures metrics.Counter `metric:"requests" tags:"error=true"`
// RequestLatencySuccess is a latency histogram of succesful requests.
RequestLatencySuccess metrics.Timer `metric:"request_latency" tags:"error=false"`
// RequestLatencyFailures is a latency histogram of failed requests.
RequestLatencyFailures metrics.Timer `metric:"request_latency" tags:"error=true"`
// HTTPStatusCode2xx is a counter of the total number of requests with HTTP status code 200-299
HTTPStatusCode2xx metrics.Counter `metric:"http_requests" tags:"status_code=2xx"`
// HTTPStatusCode3xx is a counter of the total number of requests with HTTP status code 300-399
HTTPStatusCode3xx metrics.Counter `metric:"http_requests" tags:"status_code=3xx"`
// HTTPStatusCode4xx is a counter of the total number of requests with HTTP status code 400-499
HTTPStatusCode4xx metrics.Counter `metric:"http_requests" tags:"status_code=4xx"`
// HTTPStatusCode5xx is a counter of the total number of requests with HTTP status code 500-599
HTTPStatusCode5xx metrics.Counter `metric:"http_requests" tags:"status_code=5xx"`
}
func (m *Metrics) recordHTTPStatusCode(statusCode uint16) {
if statusCode >= 200 && statusCode < 300 {
m.HTTPStatusCode2xx.Inc(1)
} else if statusCode >= 300 && statusCode < 400 {
m.HTTPStatusCode3xx.Inc(1)
} else if statusCode >= 400 && statusCode < 500 {
m.HTTPStatusCode4xx.Inc(1)
} else if statusCode >= 500 && statusCode < 600 {
m.HTTPStatusCode5xx.Inc(1)
}
}
// MetricsByEndpoint is a registry/cache of metrics for each unique endpoint name.
// Only maxNumberOfEndpoints Metrics are stored, all other endpoint names are mapped
// to a generic endpoint name "other".
type MetricsByEndpoint struct {
metricsFactory metrics.Factory
endpoints *normalizedEndpoints
metricsByEndpoint map[string]*Metrics
mux sync.RWMutex
}
func newMetricsByEndpoint(
metricsFactory metrics.Factory,
normalizer NameNormalizer,
maxNumberOfEndpoints int,
) *MetricsByEndpoint {
return &MetricsByEndpoint{
metricsFactory: metricsFactory,
endpoints: newNormalizedEndpoints(maxNumberOfEndpoints, normalizer),
metricsByEndpoint: make(map[string]*Metrics, maxNumberOfEndpoints+1), // +1 for "other"
}
}
func (m *MetricsByEndpoint) get(endpoint string) *Metrics {
safeName := m.endpoints.normalize(endpoint)
if safeName == "" {
safeName = otherEndpointsPlaceholder
}
m.mux.RLock()
met := m.metricsByEndpoint[safeName]
m.mux.RUnlock()
if met != nil {
return met
}
return m.getWithWriteLock(safeName)
}
// split to make easier to test
func (m *MetricsByEndpoint) getWithWriteLock(safeName string) *Metrics {
m.mux.Lock()
defer m.mux.Unlock()
// it is possible that the name has been already registered after we released
// the read lock and before we grabbed the write lock, so check for that.
if met, ok := m.metricsByEndpoint[safeName]; ok {
return met
}
// it would be nice to create the struct before locking, since Init() is somewhat
// expensive, however some metrics backends (e.g. expvar) may not like duplicate metrics.
met := &Metrics{}
tags := map[string]string{endpointNameMetricTag: safeName}
metrics.Init(met, m.metricsFactory, tags)
m.metricsByEndpoint[safeName] = met
return met
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rpcmetrics
// NameNormalizer is used to convert the endpoint names to strings
// that can be safely used as tags in the metrics.
type NameNormalizer interface {
Normalize(name string) string
}
// DefaultNameNormalizer converts endpoint names so that they contain only characters
// from the safe charset [a-zA-Z0-9-./_]. All other characters are replaced with '-'.
var DefaultNameNormalizer = &SimpleNameNormalizer{
SafeSets: []SafeCharacterSet{
&Range{From: 'a', To: 'z'},
&Range{From: 'A', To: 'Z'},
&Range{From: '0', To: '9'},
&Char{'-'},
&Char{'_'},
&Char{'/'},
&Char{'.'},
},
Replacement: '-',
}
// SimpleNameNormalizer uses a set of safe character sets.
type SimpleNameNormalizer struct {
SafeSets []SafeCharacterSet
Replacement byte
}
// SafeCharacterSet determines if the given character is "safe"
type SafeCharacterSet interface {
IsSafe(c byte) bool
}
// Range implements SafeCharacterSet
type Range struct {
From, To byte
}
// IsSafe implements SafeCharacterSet
func (r *Range) IsSafe(c byte) bool {
return c >= r.From && c <= r.To
}
// Char implements SafeCharacterSet
type Char struct {
Val byte
}
// IsSafe implements SafeCharacterSet
func (ch *Char) IsSafe(c byte) bool {
return c == ch.Val
}
// Normalize checks each character in the string against SafeSets,
// and if it's not safe substitutes it with Replacement.
func (n *SimpleNameNormalizer) Normalize(name string) string {
var retMe []byte
nameBytes := []byte(name)
for i, b := range nameBytes {
if n.safeByte(b) {
if retMe != nil {
retMe[i] = b
}
} else {
if retMe == nil {
retMe = make([]byte, len(nameBytes))
copy(retMe[0:i], nameBytes[0:i])
}
retMe[i] = n.Replacement
}
}
if retMe == nil {
return name
}
return string(retMe)
}
// safeByte checks if b against all safe charsets.
func (n *SimpleNameNormalizer) safeByte(b byte) bool {
for i := range n.SafeSets {
if n.SafeSets[i].IsSafe(b) {
return true
}
}
return false
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rpcmetrics
import (
"strconv"
"sync"
"time"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/uber/jaeger-lib/metrics"
jaeger "github.com/uber/jaeger-client-go"
)
const defaultMaxNumberOfEndpoints = 200
// Observer is an observer that can emit RPC metrics.
type Observer struct {
metricsByEndpoint *MetricsByEndpoint
}
// NewObserver creates a new observer that can emit RPC metrics.
func NewObserver(metricsFactory metrics.Factory, normalizer NameNormalizer) *Observer {
return &Observer{
metricsByEndpoint: newMetricsByEndpoint(
metricsFactory,
normalizer,
defaultMaxNumberOfEndpoints,
),
}
}
// OnStartSpan creates a new Observer for the span.
func (o *Observer) OnStartSpan(
operationName string,
options opentracing.StartSpanOptions,
) jaeger.SpanObserver {
return NewSpanObserver(o.metricsByEndpoint, operationName, options)
}
// SpanKind identifies the span as inboud, outbound, or internal
type SpanKind int
const (
// Local span kind
Local SpanKind = iota
// Inbound span kind
Inbound
// Outbound span kind
Outbound
)
// SpanObserver collects RPC metrics
type SpanObserver struct {
metricsByEndpoint *MetricsByEndpoint
operationName string
startTime time.Time
mux sync.Mutex
kind SpanKind
httpStatusCode uint16
err bool
}
// NewSpanObserver creates a new SpanObserver that can emit RPC metrics.
func NewSpanObserver(
metricsByEndpoint *MetricsByEndpoint,
operationName string,
options opentracing.StartSpanOptions,
) *SpanObserver {
so := &SpanObserver{
metricsByEndpoint: metricsByEndpoint,
operationName: operationName,
startTime: options.StartTime,
}
for k, v := range options.Tags {
so.handleTagInLock(k, v)
}
return so
}
// handleTags watches for special tags
// - SpanKind
// - HttpStatusCode
// - Error
func (so *SpanObserver) handleTagInLock(key string, value interface{}) {
if key == string(ext.SpanKind) {
if v, ok := value.(ext.SpanKindEnum); ok {
value = string(v)
}
if v, ok := value.(string); ok {
if v == string(ext.SpanKindRPCClientEnum) {
so.kind = Outbound
} else if v == string(ext.SpanKindRPCServerEnum) {
so.kind = Inbound
}
}
return
}
if key == string(ext.HTTPStatusCode) {
if v, ok := value.(uint16); ok {
so.httpStatusCode = v
} else if v, ok := value.(int); ok {
so.httpStatusCode = uint16(v)
} else if v, ok := value.(string); ok {
if vv, err := strconv.Atoi(v); err == nil {
so.httpStatusCode = uint16(vv)
}
}
return
}
if key == string(ext.Error) {
if v, ok := value.(bool); ok {
so.err = v
} else if v, ok := value.(string); ok {
if vv, err := strconv.ParseBool(v); err == nil {
so.err = vv
}
}
return
}
}
// OnFinish emits the RPC metrics. It only has an effect when operation name
// is not blank, and the span kind is an RPC server.
func (so *SpanObserver) OnFinish(options opentracing.FinishOptions) {
so.mux.Lock()
defer so.mux.Unlock()
if so.operationName == "" || so.kind != Inbound {
return
}
mets := so.metricsByEndpoint.get(so.operationName)
latency := options.FinishTime.Sub(so.startTime)
if so.err {
mets.RequestCountFailures.Inc(1)
mets.RequestLatencyFailures.Record(latency)
} else {
mets.RequestCountSuccess.Inc(1)
mets.RequestLatencySuccess.Record(latency)
}
mets.recordHTTPStatusCode(so.httpStatusCode)
}
// OnSetOperationName records new operation name.
func (so *SpanObserver) OnSetOperationName(operationName string) {
so.mux.Lock()
so.operationName = operationName
so.mux.Unlock()
}
// OnSetTag implements SpanObserver
func (so *SpanObserver) OnSetTag(key string, value interface{}) {
so.mux.Lock()
so.handleTagInLock(key, value)
so.mux.Unlock()
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"fmt"
"math"
"net/url"
"sync"
"sync/atomic"
"time"
"github.com/uber/jaeger-client-go/log"
"github.com/uber/jaeger-client-go/thrift-gen/sampling"
"github.com/uber/jaeger-client-go/utils"
)
const (
defaultSamplingServerURL = "http://localhost:5778/sampling"
defaultSamplingRefreshInterval = time.Minute
defaultMaxOperations = 2000
)
// Sampler decides whether a new trace should be sampled or not.
type Sampler interface {
// IsSampled decides whether a trace with given `id` and `operation`
// should be sampled. This function will also return the tags that
// can be used to identify the type of sampling that was applied to
// the root span. Most simple samplers would return two tags,
// sampler.type and sampler.param, similar to those used in the Configuration
IsSampled(id TraceID, operation string) (sampled bool, tags []Tag)
// Close does a clean shutdown of the sampler, stopping any background
// go-routines it may have started.
Close()
// Equal checks if the `other` sampler is functionally equivalent
// to this sampler.
// TODO remove this function. This function is used to determine if 2 samplers are equivalent
// which does not bode well with the adaptive sampler which has to create all the composite samplers
// for the comparison to occur. This is expensive to do if only one sampler has changed.
Equal(other Sampler) bool
}
// -----------------------
// ConstSampler is a sampler that always makes the same decision.
type ConstSampler struct {
Decision bool
tags []Tag
}
// NewConstSampler creates a ConstSampler.
func NewConstSampler(sample bool) Sampler {
tags := []Tag{
{key: SamplerTypeTagKey, value: SamplerTypeConst},
{key: SamplerParamTagKey, value: sample},
}
return &ConstSampler{Decision: sample, tags: tags}
}
// IsSampled implements IsSampled() of Sampler.
func (s *ConstSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
return s.Decision, s.tags
}
// Close implements Close() of Sampler.
func (s *ConstSampler) Close() {
// nothing to do
}
// Equal implements Equal() of Sampler.
func (s *ConstSampler) Equal(other Sampler) bool {
if o, ok := other.(*ConstSampler); ok {
return s.Decision == o.Decision
}
return false
}
// -----------------------
// ProbabilisticSampler is a sampler that randomly samples a certain percentage
// of traces.
type ProbabilisticSampler struct {
samplingRate float64
samplingBoundary uint64
tags []Tag
}
const maxRandomNumber = ^(uint64(1) << 63) // i.e. 0x7fffffffffffffff
// NewProbabilisticSampler creates a sampler that randomly samples a certain percentage of traces specified by the
// samplingRate, in the range between 0.0 and 1.0.
//
// It relies on the fact that new trace IDs are 63bit random numbers themselves, thus making the sampling decision
// without generating a new random number, but simply calculating if traceID < (samplingRate * 2^63).
// TODO remove the error from this function for next major release
func NewProbabilisticSampler(samplingRate float64) (*ProbabilisticSampler, error) {
if samplingRate < 0.0 || samplingRate > 1.0 {
return nil, fmt.Errorf("Sampling Rate must be between 0.0 and 1.0, received %f", samplingRate)
}
return newProbabilisticSampler(samplingRate), nil
}
func newProbabilisticSampler(samplingRate float64) *ProbabilisticSampler {
samplingRate = math.Max(0.0, math.Min(samplingRate, 1.0))
tags := []Tag{
{key: SamplerTypeTagKey, value: SamplerTypeProbabilistic},
{key: SamplerParamTagKey, value: samplingRate},
}
return &ProbabilisticSampler{
samplingRate: samplingRate,
samplingBoundary: uint64(float64(maxRandomNumber) * samplingRate),
tags: tags,
}
}
// SamplingRate returns the sampling probability this sampled was constructed with.
func (s *ProbabilisticSampler) SamplingRate() float64 {
return s.samplingRate
}
// IsSampled implements IsSampled() of Sampler.
func (s *ProbabilisticSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
return s.samplingBoundary >= id.Low, s.tags
}
// Close implements Close() of Sampler.
func (s *ProbabilisticSampler) Close() {
// nothing to do
}
// Equal implements Equal() of Sampler.
func (s *ProbabilisticSampler) Equal(other Sampler) bool {
if o, ok := other.(*ProbabilisticSampler); ok {
return s.samplingBoundary == o.samplingBoundary
}
return false
}
// -----------------------
type rateLimitingSampler struct {
maxTracesPerSecond float64
rateLimiter utils.RateLimiter
tags []Tag
}
// NewRateLimitingSampler creates a sampler that samples at most maxTracesPerSecond. The distribution of sampled
// traces follows burstiness of the service, i.e. a service with uniformly distributed requests will have those
// requests sampled uniformly as well, but if requests are bursty, especially sub-second, then a number of
// sequential requests can be sampled each second.
func NewRateLimitingSampler(maxTracesPerSecond float64) Sampler {
tags := []Tag{
{key: SamplerTypeTagKey, value: SamplerTypeRateLimiting},
{key: SamplerParamTagKey, value: maxTracesPerSecond},
}
return &rateLimitingSampler{
maxTracesPerSecond: maxTracesPerSecond,
rateLimiter: utils.NewRateLimiter(maxTracesPerSecond, math.Max(maxTracesPerSecond, 1.0)),
tags: tags,
}
}
// IsSampled implements IsSampled() of Sampler.
func (s *rateLimitingSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
return s.rateLimiter.CheckCredit(1.0), s.tags
}
func (s *rateLimitingSampler) Close() {
// nothing to do
}
func (s *rateLimitingSampler) Equal(other Sampler) bool {
if o, ok := other.(*rateLimitingSampler); ok {
return s.maxTracesPerSecond == o.maxTracesPerSecond
}
return false
}
// -----------------------
// GuaranteedThroughputProbabilisticSampler is a sampler that leverages both probabilisticSampler and
// rateLimitingSampler. The rateLimitingSampler is used as a guaranteed lower bound sampler such that
// every operation is sampled at least once in a time interval defined by the lowerBound. ie a lowerBound
// of 1.0 / (60 * 10) will sample an operation at least once every 10 minutes.
//
// The probabilisticSampler is given higher priority when tags are emitted, ie. if IsSampled() for both
// samplers return true, the tags for probabilisticSampler will be used.
type GuaranteedThroughputProbabilisticSampler struct {
probabilisticSampler *ProbabilisticSampler
lowerBoundSampler Sampler
tags []Tag
samplingRate float64
lowerBound float64
}
// NewGuaranteedThroughputProbabilisticSampler returns a delegating sampler that applies both
// probabilisticSampler and rateLimitingSampler.
func NewGuaranteedThroughputProbabilisticSampler(
lowerBound, samplingRate float64,
) (*GuaranteedThroughputProbabilisticSampler, error) {
return newGuaranteedThroughputProbabilisticSampler(lowerBound, samplingRate), nil
}
func newGuaranteedThroughputProbabilisticSampler(lowerBound, samplingRate float64) *GuaranteedThroughputProbabilisticSampler {
s := &GuaranteedThroughputProbabilisticSampler{
lowerBoundSampler: NewRateLimitingSampler(lowerBound),
lowerBound: lowerBound,
}
s.setProbabilisticSampler(samplingRate)
return s
}
func (s *GuaranteedThroughputProbabilisticSampler) setProbabilisticSampler(samplingRate float64) {
if s.probabilisticSampler == nil || s.samplingRate != samplingRate {
s.probabilisticSampler = newProbabilisticSampler(samplingRate)
s.samplingRate = s.probabilisticSampler.SamplingRate()
s.tags = []Tag{
{key: SamplerTypeTagKey, value: SamplerTypeLowerBound},
{key: SamplerParamTagKey, value: s.samplingRate},
}
}
}
// IsSampled implements IsSampled() of Sampler.
func (s *GuaranteedThroughputProbabilisticSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
if sampled, tags := s.probabilisticSampler.IsSampled(id, operation); sampled {
s.lowerBoundSampler.IsSampled(id, operation)
return true, tags
}
sampled, _ := s.lowerBoundSampler.IsSampled(id, operation)
return sampled, s.tags
}
// Close implements Close() of Sampler.
func (s *GuaranteedThroughputProbabilisticSampler) Close() {
s.probabilisticSampler.Close()
s.lowerBoundSampler.Close()
}
// Equal implements Equal() of Sampler.
func (s *GuaranteedThroughputProbabilisticSampler) Equal(other Sampler) bool {
// NB The Equal() function is expensive and will be removed. See adaptiveSampler.Equal() for
// more information.
return false
}
// this function should only be called while holding a Write lock
func (s *GuaranteedThroughputProbabilisticSampler) update(lowerBound, samplingRate float64) {
s.setProbabilisticSampler(samplingRate)
if s.lowerBound != lowerBound {
s.lowerBoundSampler = NewRateLimitingSampler(lowerBound)
s.lowerBound = lowerBound
}
}
// -----------------------
type adaptiveSampler struct {
sync.RWMutex
samplers map[string]*GuaranteedThroughputProbabilisticSampler
defaultSampler *ProbabilisticSampler
lowerBound float64
maxOperations int
}
// NewAdaptiveSampler returns a delegating sampler that applies both probabilisticSampler and
// rateLimitingSampler via the guaranteedThroughputProbabilisticSampler. This sampler keeps track of all
// operations and delegates calls to the respective guaranteedThroughputProbabilisticSampler.
func NewAdaptiveSampler(strategies *sampling.PerOperationSamplingStrategies, maxOperations int) (Sampler, error) {
return newAdaptiveSampler(strategies, maxOperations), nil
}
func newAdaptiveSampler(strategies *sampling.PerOperationSamplingStrategies, maxOperations int) Sampler {
samplers := make(map[string]*GuaranteedThroughputProbabilisticSampler)
for _, strategy := range strategies.PerOperationStrategies {
sampler := newGuaranteedThroughputProbabilisticSampler(
strategies.DefaultLowerBoundTracesPerSecond,
strategy.ProbabilisticSampling.SamplingRate,
)
samplers[strategy.Operation] = sampler
}
return &adaptiveSampler{
samplers: samplers,
defaultSampler: newProbabilisticSampler(strategies.DefaultSamplingProbability),
lowerBound: strategies.DefaultLowerBoundTracesPerSecond,
maxOperations: maxOperations,
}
}
func (s *adaptiveSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
s.RLock()
sampler, ok := s.samplers[operation]
if ok {
defer s.RUnlock()
return sampler.IsSampled(id, operation)
}
s.RUnlock()
s.Lock()
defer s.Unlock()
// Check if sampler has already been created
sampler, ok = s.samplers[operation]
if ok {
return sampler.IsSampled(id, operation)
}
// Store only up to maxOperations of unique ops.
if len(s.samplers) >= s.maxOperations {
return s.defaultSampler.IsSampled(id, operation)
}
newSampler := newGuaranteedThroughputProbabilisticSampler(s.lowerBound, s.defaultSampler.SamplingRate())
s.samplers[operation] = newSampler
return newSampler.IsSampled(id, operation)
}
func (s *adaptiveSampler) Close() {
s.Lock()
defer s.Unlock()
for _, sampler := range s.samplers {
sampler.Close()
}
s.defaultSampler.Close()
}
func (s *adaptiveSampler) Equal(other Sampler) bool {
// NB The Equal() function is overly expensive for adaptiveSampler since it's composed of multiple
// samplers which all need to be initialized before this function can be called for a comparison.
// Therefore, adaptiveSampler uses the update() function to only alter the samplers that need
// changing. Hence this function always returns false so that the update function can be called.
// Once the Equal() function is removed from the Sampler API, this will no longer be needed.
return false
}
func (s *adaptiveSampler) update(strategies *sampling.PerOperationSamplingStrategies) {
s.Lock()
defer s.Unlock()
for _, strategy := range strategies.PerOperationStrategies {
operation := strategy.Operation
samplingRate := strategy.ProbabilisticSampling.SamplingRate
lowerBound := strategies.DefaultLowerBoundTracesPerSecond
if sampler, ok := s.samplers[operation]; ok {
sampler.update(lowerBound, samplingRate)
} else {
sampler := newGuaranteedThroughputProbabilisticSampler(
lowerBound,
samplingRate,
)
s.samplers[operation] = sampler
}
}
s.lowerBound = strategies.DefaultLowerBoundTracesPerSecond
if s.defaultSampler.SamplingRate() != strategies.DefaultSamplingProbability {
s.defaultSampler = newProbabilisticSampler(strategies.DefaultSamplingProbability)
}
}
// -----------------------
// RemotelyControlledSampler is a delegating sampler that polls a remote server
// for the appropriate sampling strategy, constructs a corresponding sampler and
// delegates to it for sampling decisions.
type RemotelyControlledSampler struct {
// These fields must be first in the struct because `sync/atomic` expects 64-bit alignment.
// Cf. https://github.com/uber/jaeger-client-go/issues/155, https://goo.gl/zW7dgq
closed int64 // 0 - not closed, 1 - closed
sync.RWMutex
samplerOptions
serviceName string
manager sampling.SamplingManager
doneChan chan *sync.WaitGroup
}
type httpSamplingManager struct {
serverURL string
}
func (s *httpSamplingManager) GetSamplingStrategy(serviceName string) (*sampling.SamplingStrategyResponse, error) {
var out sampling.SamplingStrategyResponse
v := url.Values{}
v.Set("service", serviceName)
if err := utils.GetJSON(s.serverURL+"?"+v.Encode(), &out); err != nil {
return nil, err
}
return &out, nil
}
// NewRemotelyControlledSampler creates a sampler that periodically pulls
// the sampling strategy from an HTTP sampling server (e.g. jaeger-agent).
func NewRemotelyControlledSampler(
serviceName string,
opts ...SamplerOption,
) *RemotelyControlledSampler {
options := applySamplerOptions(opts...)
sampler := &RemotelyControlledSampler{
samplerOptions: options,
serviceName: serviceName,
manager: &httpSamplingManager{serverURL: options.samplingServerURL},
doneChan: make(chan *sync.WaitGroup),
}
go sampler.pollController()
return sampler
}
func applySamplerOptions(opts ...SamplerOption) samplerOptions {
options := samplerOptions{}
for _, option := range opts {
option(&options)
}
if options.sampler == nil {
options.sampler = newProbabilisticSampler(0.001)
}
if options.logger == nil {
options.logger = log.NullLogger
}
if options.maxOperations <= 0 {
options.maxOperations = defaultMaxOperations
}
if options.samplingServerURL == "" {
options.samplingServerURL = defaultSamplingServerURL
}
if options.metrics == nil {
options.metrics = NewNullMetrics()
}
if options.samplingRefreshInterval <= 0 {
options.samplingRefreshInterval = defaultSamplingRefreshInterval
}
return options
}
// IsSampled implements IsSampled() of Sampler.
func (s *RemotelyControlledSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
s.RLock()
defer s.RUnlock()
return s.sampler.IsSampled(id, operation)
}
// Close implements Close() of Sampler.
func (s *RemotelyControlledSampler) Close() {
if swapped := atomic.CompareAndSwapInt64(&s.closed, 0, 1); !swapped {
s.logger.Error("Repeated attempt to close the sampler is ignored")
return
}
var wg sync.WaitGroup
wg.Add(1)
s.doneChan <- &wg
wg.Wait()
}
// Equal implements Equal() of Sampler.
func (s *RemotelyControlledSampler) Equal(other Sampler) bool {
// NB The Equal() function is expensive and will be removed. See adaptiveSampler.Equal() for
// more information.
if o, ok := other.(*RemotelyControlledSampler); ok {
s.RLock()
o.RLock()
defer s.RUnlock()
defer o.RUnlock()
return s.sampler.Equal(o.sampler)
}
return false
}
func (s *RemotelyControlledSampler) pollController() {
ticker := time.NewTicker(s.samplingRefreshInterval)
defer ticker.Stop()
s.pollControllerWithTicker(ticker)
}
func (s *RemotelyControlledSampler) pollControllerWithTicker(ticker *time.Ticker) {
for {
select {
case <-ticker.C:
s.updateSampler()
case wg := <-s.doneChan:
wg.Done()
return
}
}
}
func (s *RemotelyControlledSampler) getSampler() Sampler {
s.Lock()
defer s.Unlock()
return s.sampler
}
func (s *RemotelyControlledSampler) setSampler(sampler Sampler) {
s.Lock()
defer s.Unlock()
s.sampler = sampler
}
func (s *RemotelyControlledSampler) updateSampler() {
res, err := s.manager.GetSamplingStrategy(s.serviceName)
if err != nil {
s.metrics.SamplerQueryFailure.Inc(1)
return
}
s.Lock()
defer s.Unlock()
s.metrics.SamplerRetrieved.Inc(1)
if strategies := res.GetOperationSampling(); strategies != nil {
s.updateAdaptiveSampler(strategies)
} else {
err = s.updateRateLimitingOrProbabilisticSampler(res)
}
if err != nil {
s.metrics.SamplerUpdateFailure.Inc(1)
s.logger.Infof("Unable to handle sampling strategy response %+v. Got error: %v", res, err)
return
}
s.metrics.SamplerUpdated.Inc(1)
}
// NB: this function should only be called while holding a Write lock
func (s *RemotelyControlledSampler) updateAdaptiveSampler(strategies *sampling.PerOperationSamplingStrategies) {
if adaptiveSampler, ok := s.sampler.(*adaptiveSampler); ok {
adaptiveSampler.update(strategies)
} else {
s.sampler = newAdaptiveSampler(strategies, s.maxOperations)
}
}
// NB: this function should only be called while holding a Write lock
func (s *RemotelyControlledSampler) updateRateLimitingOrProbabilisticSampler(res *sampling.SamplingStrategyResponse) error {
var newSampler Sampler
if probabilistic := res.GetProbabilisticSampling(); probabilistic != nil {
newSampler = newProbabilisticSampler(probabilistic.SamplingRate)
} else if rateLimiting := res.GetRateLimitingSampling(); rateLimiting != nil {
newSampler = NewRateLimitingSampler(float64(rateLimiting.MaxTracesPerSecond))
} else {
return fmt.Errorf("Unsupported sampling strategy type %v", res.GetStrategyType())
}
if !s.sampler.Equal(newSampler) {
s.sampler = newSampler
}
return nil
}

81
vendor/github.com/uber/jaeger-client-go/sampler_options.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"time"
)
// SamplerOption is a function that sets some option on the sampler
type SamplerOption func(options *samplerOptions)
// SamplerOptions is a factory for all available SamplerOption's
var SamplerOptions samplerOptions
type samplerOptions struct {
metrics *Metrics
maxOperations int
sampler Sampler
logger Logger
samplingServerURL string
samplingRefreshInterval time.Duration
}
// Metrics creates a SamplerOption that initializes Metrics on the sampler,
// which is used to emit statistics.
func (samplerOptions) Metrics(m *Metrics) SamplerOption {
return func(o *samplerOptions) {
o.metrics = m
}
}
// MaxOperations creates a SamplerOption that sets the maximum number of
// operations the sampler will keep track of.
func (samplerOptions) MaxOperations(maxOperations int) SamplerOption {
return func(o *samplerOptions) {
o.maxOperations = maxOperations
}
}
// InitialSampler creates a SamplerOption that sets the initial sampler
// to use before a remote sampler is created and used.
func (samplerOptions) InitialSampler(sampler Sampler) SamplerOption {
return func(o *samplerOptions) {
o.sampler = sampler
}
}
// Logger creates a SamplerOption that sets the logger used by the sampler.
func (samplerOptions) Logger(logger Logger) SamplerOption {
return func(o *samplerOptions) {
o.logger = logger
}
}
// SamplingServerURL creates a SamplerOption that sets the sampling server url
// of the local agent that contains the sampling strategies.
func (samplerOptions) SamplingServerURL(samplingServerURL string) SamplerOption {
return func(o *samplerOptions) {
o.samplingServerURL = samplingServerURL
}
}
// SamplingRefreshInterval creates a SamplerOption that sets how often the
// sampler will poll local agent for the appropriate sampling strategy.
func (samplerOptions) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
return func(o *samplerOptions) {
o.samplingRefreshInterval = samplingRefreshInterval
}
}

249
vendor/github.com/uber/jaeger-client-go/span.go generated vendored Normal file
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// Copyright (c) 2017-2018 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"sync"
"time"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/opentracing/opentracing-go/log"
)
// Span implements opentracing.Span
type Span struct {
sync.RWMutex
tracer *Tracer
context SpanContext
// The name of the "operation" this span is an instance of.
// Known as a "span name" in some implementations.
operationName string
// firstInProcess, if true, indicates that this span is the root of the (sub)tree
// of spans in the current process. In other words it's true for the root spans,
// and the ingress spans when the process joins another trace.
firstInProcess bool
// startTime is the timestamp indicating when the span began, with microseconds precision.
startTime time.Time
// duration returns duration of the span with microseconds precision.
// Zero value means duration is unknown.
duration time.Duration
// tags attached to this span
tags []Tag
// The span's "micro-log"
logs []opentracing.LogRecord
// references for this span
references []Reference
observer ContribSpanObserver
}
// Tag is a simple key value wrapper.
// TODO deprecate in the next major release, use opentracing.Tag instead.
type Tag struct {
key string
value interface{}
}
// SetOperationName sets or changes the operation name.
func (s *Span) SetOperationName(operationName string) opentracing.Span {
s.Lock()
defer s.Unlock()
if s.context.IsSampled() {
s.operationName = operationName
}
s.observer.OnSetOperationName(operationName)
return s
}
// SetTag implements SetTag() of opentracing.Span
func (s *Span) SetTag(key string, value interface{}) opentracing.Span {
s.observer.OnSetTag(key, value)
if key == string(ext.SamplingPriority) && !setSamplingPriority(s, value) {
return s
}
s.Lock()
defer s.Unlock()
if s.context.IsSampled() {
s.setTagNoLocking(key, value)
}
return s
}
func (s *Span) setTagNoLocking(key string, value interface{}) {
s.tags = append(s.tags, Tag{key: key, value: value})
}
// LogFields implements opentracing.Span API
func (s *Span) LogFields(fields ...log.Field) {
s.Lock()
defer s.Unlock()
if !s.context.IsSampled() {
return
}
s.logFieldsNoLocking(fields...)
}
// this function should only be called while holding a Write lock
func (s *Span) logFieldsNoLocking(fields ...log.Field) {
lr := opentracing.LogRecord{
Fields: fields,
Timestamp: time.Now(),
}
s.appendLog(lr)
}
// LogKV implements opentracing.Span API
func (s *Span) LogKV(alternatingKeyValues ...interface{}) {
s.RLock()
sampled := s.context.IsSampled()
s.RUnlock()
if !sampled {
return
}
fields, err := log.InterleavedKVToFields(alternatingKeyValues...)
if err != nil {
s.LogFields(log.Error(err), log.String("function", "LogKV"))
return
}
s.LogFields(fields...)
}
// LogEvent implements opentracing.Span API
func (s *Span) LogEvent(event string) {
s.Log(opentracing.LogData{Event: event})
}
// LogEventWithPayload implements opentracing.Span API
func (s *Span) LogEventWithPayload(event string, payload interface{}) {
s.Log(opentracing.LogData{Event: event, Payload: payload})
}
// Log implements opentracing.Span API
func (s *Span) Log(ld opentracing.LogData) {
s.Lock()
defer s.Unlock()
if s.context.IsSampled() {
if ld.Timestamp.IsZero() {
ld.Timestamp = s.tracer.timeNow()
}
s.appendLog(ld.ToLogRecord())
}
}
// this function should only be called while holding a Write lock
func (s *Span) appendLog(lr opentracing.LogRecord) {
// TODO add logic to limit number of logs per span (issue #46)
s.logs = append(s.logs, lr)
}
// SetBaggageItem implements SetBaggageItem() of opentracing.SpanContext
func (s *Span) SetBaggageItem(key, value string) opentracing.Span {
s.Lock()
defer s.Unlock()
s.tracer.setBaggage(s, key, value)
return s
}
// BaggageItem implements BaggageItem() of opentracing.SpanContext
func (s *Span) BaggageItem(key string) string {
s.RLock()
defer s.RUnlock()
return s.context.baggage[key]
}
// Finish implements opentracing.Span API
func (s *Span) Finish() {
s.FinishWithOptions(opentracing.FinishOptions{})
}
// FinishWithOptions implements opentracing.Span API
func (s *Span) FinishWithOptions(options opentracing.FinishOptions) {
if options.FinishTime.IsZero() {
options.FinishTime = s.tracer.timeNow()
}
s.observer.OnFinish(options)
s.Lock()
if s.context.IsSampled() {
s.duration = options.FinishTime.Sub(s.startTime)
// Note: bulk logs are not subject to maxLogsPerSpan limit
if options.LogRecords != nil {
s.logs = append(s.logs, options.LogRecords...)
}
for _, ld := range options.BulkLogData {
s.logs = append(s.logs, ld.ToLogRecord())
}
}
s.Unlock()
// call reportSpan even for non-sampled traces, to return span to the pool
s.tracer.reportSpan(s)
}
// Context implements opentracing.Span API
func (s *Span) Context() opentracing.SpanContext {
s.Lock()
defer s.Unlock()
return s.context
}
// Tracer implements opentracing.Span API
func (s *Span) Tracer() opentracing.Tracer {
return s.tracer
}
func (s *Span) String() string {
s.RLock()
defer s.RUnlock()
return s.context.String()
}
// OperationName allows retrieving current operation name.
func (s *Span) OperationName() string {
s.RLock()
defer s.RUnlock()
return s.operationName
}
func (s *Span) serviceName() string {
return s.tracer.serviceName
}
// setSamplingPriority returns true if the flag was updated successfully, false otherwise.
func setSamplingPriority(s *Span, value interface{}) bool {
s.Lock()
defer s.Unlock()
val, ok := value.(uint16)
if !ok {
return false
}
if val == 0 {
s.context.flags = s.context.flags & (^flagSampled)
return true
}
if s.tracer.isDebugAllowed(s.operationName) {
s.context.flags = s.context.flags | flagDebug | flagSampled
return true
}
return false
}

411
vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent.go generated vendored Normal file
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// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package agent
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
var _ = jaeger.GoUnusedProtection__
var _ = zipkincore.GoUnusedProtection__
type Agent interface {
// Parameters:
// - Spans
EmitZipkinBatch(spans []*zipkincore.Span) (err error)
// Parameters:
// - Batch
EmitBatch(batch *jaeger.Batch) (err error)
}
type AgentClient struct {
Transport thrift.TTransport
ProtocolFactory thrift.TProtocolFactory
InputProtocol thrift.TProtocol
OutputProtocol thrift.TProtocol
SeqId int32
}
func NewAgentClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *AgentClient {
return &AgentClient{Transport: t,
ProtocolFactory: f,
InputProtocol: f.GetProtocol(t),
OutputProtocol: f.GetProtocol(t),
SeqId: 0,
}
}
func NewAgentClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *AgentClient {
return &AgentClient{Transport: t,
ProtocolFactory: nil,
InputProtocol: iprot,
OutputProtocol: oprot,
SeqId: 0,
}
}
// Parameters:
// - Spans
func (p *AgentClient) EmitZipkinBatch(spans []*zipkincore.Span) (err error) {
if err = p.sendEmitZipkinBatch(spans); err != nil {
return
}
return
}
func (p *AgentClient) sendEmitZipkinBatch(spans []*zipkincore.Span) (err error) {
oprot := p.OutputProtocol
if oprot == nil {
oprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.OutputProtocol = oprot
}
p.SeqId++
if err = oprot.WriteMessageBegin("emitZipkinBatch", thrift.ONEWAY, p.SeqId); err != nil {
return
}
args := AgentEmitZipkinBatchArgs{
Spans: spans,
}
if err = args.Write(oprot); err != nil {
return
}
if err = oprot.WriteMessageEnd(); err != nil {
return
}
return oprot.Flush()
}
// Parameters:
// - Batch
func (p *AgentClient) EmitBatch(batch *jaeger.Batch) (err error) {
if err = p.sendEmitBatch(batch); err != nil {
return
}
return
}
func (p *AgentClient) sendEmitBatch(batch *jaeger.Batch) (err error) {
oprot := p.OutputProtocol
if oprot == nil {
oprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.OutputProtocol = oprot
}
p.SeqId++
if err = oprot.WriteMessageBegin("emitBatch", thrift.ONEWAY, p.SeqId); err != nil {
return
}
args := AgentEmitBatchArgs{
Batch: batch,
}
if err = args.Write(oprot); err != nil {
return
}
if err = oprot.WriteMessageEnd(); err != nil {
return
}
return oprot.Flush()
}
type AgentProcessor struct {
processorMap map[string]thrift.TProcessorFunction
handler Agent
}
func (p *AgentProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
p.processorMap[key] = processor
}
func (p *AgentProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
processor, ok = p.processorMap[key]
return processor, ok
}
func (p *AgentProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
return p.processorMap
}
func NewAgentProcessor(handler Agent) *AgentProcessor {
self0 := &AgentProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
self0.processorMap["emitZipkinBatch"] = &agentProcessorEmitZipkinBatch{handler: handler}
self0.processorMap["emitBatch"] = &agentProcessorEmitBatch{handler: handler}
return self0
}
func (p *AgentProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
name, _, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return false, err
}
if processor, ok := p.GetProcessorFunction(name); ok {
return processor.Process(seqId, iprot, oprot)
}
iprot.Skip(thrift.STRUCT)
iprot.ReadMessageEnd()
x1 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
x1.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, x1
}
type agentProcessorEmitZipkinBatch struct {
handler Agent
}
func (p *agentProcessorEmitZipkinBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
args := AgentEmitZipkinBatchArgs{}
if err = args.Read(iprot); err != nil {
iprot.ReadMessageEnd()
return false, err
}
iprot.ReadMessageEnd()
var err2 error
if err2 = p.handler.EmitZipkinBatch(args.Spans); err2 != nil {
return true, err2
}
return true, nil
}
type agentProcessorEmitBatch struct {
handler Agent
}
func (p *agentProcessorEmitBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
args := AgentEmitBatchArgs{}
if err = args.Read(iprot); err != nil {
iprot.ReadMessageEnd()
return false, err
}
iprot.ReadMessageEnd()
var err2 error
if err2 = p.handler.EmitBatch(args.Batch); err2 != nil {
return true, err2
}
return true, nil
}
// HELPER FUNCTIONS AND STRUCTURES
// Attributes:
// - Spans
type AgentEmitZipkinBatchArgs struct {
Spans []*zipkincore.Span `thrift:"spans,1" json:"spans"`
}
func NewAgentEmitZipkinBatchArgs() *AgentEmitZipkinBatchArgs {
return &AgentEmitZipkinBatchArgs{}
}
func (p *AgentEmitZipkinBatchArgs) GetSpans() []*zipkincore.Span {
return p.Spans
}
func (p *AgentEmitZipkinBatchArgs) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *AgentEmitZipkinBatchArgs) readField1(iprot thrift.TProtocol) error {
_, size, err := iprot.ReadListBegin()
if err != nil {
return thrift.PrependError("error reading list begin: ", err)
}
tSlice := make([]*zipkincore.Span, 0, size)
p.Spans = tSlice
for i := 0; i < size; i++ {
_elem2 := &zipkincore.Span{}
if err := _elem2.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem2), err)
}
p.Spans = append(p.Spans, _elem2)
}
if err := iprot.ReadListEnd(); err != nil {
return thrift.PrependError("error reading list end: ", err)
}
return nil
}
func (p *AgentEmitZipkinBatchArgs) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("emitZipkinBatch_args"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *AgentEmitZipkinBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("spans", thrift.LIST, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:spans: ", p), err)
}
if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Spans)); err != nil {
return thrift.PrependError("error writing list begin: ", err)
}
for _, v := range p.Spans {
if err := v.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
}
}
if err := oprot.WriteListEnd(); err != nil {
return thrift.PrependError("error writing list end: ", err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:spans: ", p), err)
}
return err
}
func (p *AgentEmitZipkinBatchArgs) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("AgentEmitZipkinBatchArgs(%+v)", *p)
}
// Attributes:
// - Batch
type AgentEmitBatchArgs struct {
Batch *jaeger.Batch `thrift:"batch,1" json:"batch"`
}
func NewAgentEmitBatchArgs() *AgentEmitBatchArgs {
return &AgentEmitBatchArgs{}
}
var AgentEmitBatchArgs_Batch_DEFAULT *jaeger.Batch
func (p *AgentEmitBatchArgs) GetBatch() *jaeger.Batch {
if !p.IsSetBatch() {
return AgentEmitBatchArgs_Batch_DEFAULT
}
return p.Batch
}
func (p *AgentEmitBatchArgs) IsSetBatch() bool {
return p.Batch != nil
}
func (p *AgentEmitBatchArgs) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *AgentEmitBatchArgs) readField1(iprot thrift.TProtocol) error {
p.Batch = &jaeger.Batch{}
if err := p.Batch.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Batch), err)
}
return nil
}
func (p *AgentEmitBatchArgs) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("emitBatch_args"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *AgentEmitBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("batch", thrift.STRUCT, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:batch: ", p), err)
}
if err := p.Batch.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Batch), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:batch: ", p), err)
}
return err
}
func (p *AgentEmitBatchArgs) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("AgentEmitBatchArgs(%+v)", *p)
}

23
vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/constants.go generated vendored Normal file
View File

@ -0,0 +1,23 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package agent
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
var _ = jaeger.GoUnusedProtection__
var _ = zipkincore.GoUnusedProtection__
func init() {
}

21
vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/ttypes.go generated vendored Normal file
View File

@ -0,0 +1,21 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package agent
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
var _ = jaeger.GoUnusedProtection__
var _ = zipkincore.GoUnusedProtection__
var GoUnusedProtection__ int

435
vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggagerestrictionmanager.go generated vendored Normal file
View File

@ -0,0 +1,435 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package baggage
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
type BaggageRestrictionManager interface {
// getBaggageRestrictions retrieves the baggage restrictions for a specific service.
// Usually, baggageRestrictions apply to all services however there may be situations
// where a baggageKey might only be allowed to be set by a specific service.
//
// Parameters:
// - ServiceName
GetBaggageRestrictions(serviceName string) (r []*BaggageRestriction, err error)
}
type BaggageRestrictionManagerClient struct {
Transport thrift.TTransport
ProtocolFactory thrift.TProtocolFactory
InputProtocol thrift.TProtocol
OutputProtocol thrift.TProtocol
SeqId int32
}
func NewBaggageRestrictionManagerClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *BaggageRestrictionManagerClient {
return &BaggageRestrictionManagerClient{Transport: t,
ProtocolFactory: f,
InputProtocol: f.GetProtocol(t),
OutputProtocol: f.GetProtocol(t),
SeqId: 0,
}
}
func NewBaggageRestrictionManagerClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *BaggageRestrictionManagerClient {
return &BaggageRestrictionManagerClient{Transport: t,
ProtocolFactory: nil,
InputProtocol: iprot,
OutputProtocol: oprot,
SeqId: 0,
}
}
// getBaggageRestrictions retrieves the baggage restrictions for a specific service.
// Usually, baggageRestrictions apply to all services however there may be situations
// where a baggageKey might only be allowed to be set by a specific service.
//
// Parameters:
// - ServiceName
func (p *BaggageRestrictionManagerClient) GetBaggageRestrictions(serviceName string) (r []*BaggageRestriction, err error) {
if err = p.sendGetBaggageRestrictions(serviceName); err != nil {
return
}
return p.recvGetBaggageRestrictions()
}
func (p *BaggageRestrictionManagerClient) sendGetBaggageRestrictions(serviceName string) (err error) {
oprot := p.OutputProtocol
if oprot == nil {
oprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.OutputProtocol = oprot
}
p.SeqId++
if err = oprot.WriteMessageBegin("getBaggageRestrictions", thrift.CALL, p.SeqId); err != nil {
return
}
args := BaggageRestrictionManagerGetBaggageRestrictionsArgs{
ServiceName: serviceName,
}
if err = args.Write(oprot); err != nil {
return
}
if err = oprot.WriteMessageEnd(); err != nil {
return
}
return oprot.Flush()
}
func (p *BaggageRestrictionManagerClient) recvGetBaggageRestrictions() (value []*BaggageRestriction, err error) {
iprot := p.InputProtocol
if iprot == nil {
iprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.InputProtocol = iprot
}
method, mTypeId, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return
}
if method != "getBaggageRestrictions" {
err = thrift.NewTApplicationException(thrift.WRONG_METHOD_NAME, "getBaggageRestrictions failed: wrong method name")
return
}
if p.SeqId != seqId {
err = thrift.NewTApplicationException(thrift.BAD_SEQUENCE_ID, "getBaggageRestrictions failed: out of sequence response")
return
}
if mTypeId == thrift.EXCEPTION {
error0 := thrift.NewTApplicationException(thrift.UNKNOWN_APPLICATION_EXCEPTION, "Unknown Exception")
var error1 error
error1, err = error0.Read(iprot)
if err != nil {
return
}
if err = iprot.ReadMessageEnd(); err != nil {
return
}
err = error1
return
}
if mTypeId != thrift.REPLY {
err = thrift.NewTApplicationException(thrift.INVALID_MESSAGE_TYPE_EXCEPTION, "getBaggageRestrictions failed: invalid message type")
return
}
result := BaggageRestrictionManagerGetBaggageRestrictionsResult{}
if err = result.Read(iprot); err != nil {
return
}
if err = iprot.ReadMessageEnd(); err != nil {
return
}
value = result.GetSuccess()
return
}
type BaggageRestrictionManagerProcessor struct {
processorMap map[string]thrift.TProcessorFunction
handler BaggageRestrictionManager
}
func (p *BaggageRestrictionManagerProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
p.processorMap[key] = processor
}
func (p *BaggageRestrictionManagerProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
processor, ok = p.processorMap[key]
return processor, ok
}
func (p *BaggageRestrictionManagerProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
return p.processorMap
}
func NewBaggageRestrictionManagerProcessor(handler BaggageRestrictionManager) *BaggageRestrictionManagerProcessor {
self2 := &BaggageRestrictionManagerProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
self2.processorMap["getBaggageRestrictions"] = &baggageRestrictionManagerProcessorGetBaggageRestrictions{handler: handler}
return self2
}
func (p *BaggageRestrictionManagerProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
name, _, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return false, err
}
if processor, ok := p.GetProcessorFunction(name); ok {
return processor.Process(seqId, iprot, oprot)
}
iprot.Skip(thrift.STRUCT)
iprot.ReadMessageEnd()
x3 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
x3.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, x3
}
type baggageRestrictionManagerProcessorGetBaggageRestrictions struct {
handler BaggageRestrictionManager
}
func (p *baggageRestrictionManagerProcessorGetBaggageRestrictions) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
args := BaggageRestrictionManagerGetBaggageRestrictionsArgs{}
if err = args.Read(iprot); err != nil {
iprot.ReadMessageEnd()
x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err.Error())
oprot.WriteMessageBegin("getBaggageRestrictions", thrift.EXCEPTION, seqId)
x.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, err
}
iprot.ReadMessageEnd()
result := BaggageRestrictionManagerGetBaggageRestrictionsResult{}
var retval []*BaggageRestriction
var err2 error
if retval, err2 = p.handler.GetBaggageRestrictions(args.ServiceName); err2 != nil {
x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing getBaggageRestrictions: "+err2.Error())
oprot.WriteMessageBegin("getBaggageRestrictions", thrift.EXCEPTION, seqId)
x.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return true, err2
} else {
result.Success = retval
}
if err2 = oprot.WriteMessageBegin("getBaggageRestrictions", thrift.REPLY, seqId); err2 != nil {
err = err2
}
if err2 = result.Write(oprot); err == nil && err2 != nil {
err = err2
}
if err2 = oprot.WriteMessageEnd(); err == nil && err2 != nil {
err = err2
}
if err2 = oprot.Flush(); err == nil && err2 != nil {
err = err2
}
if err != nil {
return
}
return true, err
}
// HELPER FUNCTIONS AND STRUCTURES
// Attributes:
// - ServiceName
type BaggageRestrictionManagerGetBaggageRestrictionsArgs struct {
ServiceName string `thrift:"serviceName,1" json:"serviceName"`
}
func NewBaggageRestrictionManagerGetBaggageRestrictionsArgs() *BaggageRestrictionManagerGetBaggageRestrictionsArgs {
return &BaggageRestrictionManagerGetBaggageRestrictionsArgs{}
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) GetServiceName() string {
return p.ServiceName
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadString(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
p.ServiceName = v
}
return nil
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("getBaggageRestrictions_args"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("serviceName", thrift.STRING, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err)
}
if err := oprot.WriteString(string(p.ServiceName)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err)
}
return err
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("BaggageRestrictionManagerGetBaggageRestrictionsArgs(%+v)", *p)
}
// Attributes:
// - Success
type BaggageRestrictionManagerGetBaggageRestrictionsResult struct {
Success []*BaggageRestriction `thrift:"success,0" json:"success,omitempty"`
}
func NewBaggageRestrictionManagerGetBaggageRestrictionsResult() *BaggageRestrictionManagerGetBaggageRestrictionsResult {
return &BaggageRestrictionManagerGetBaggageRestrictionsResult{}
}
var BaggageRestrictionManagerGetBaggageRestrictionsResult_Success_DEFAULT []*BaggageRestriction
func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) GetSuccess() []*BaggageRestriction {
return p.Success
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) IsSetSuccess() bool {
return p.Success != nil
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 0:
if err := p.readField0(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) readField0(iprot thrift.TProtocol) error {
_, size, err := iprot.ReadListBegin()
if err != nil {
return thrift.PrependError("error reading list begin: ", err)
}
tSlice := make([]*BaggageRestriction, 0, size)
p.Success = tSlice
for i := 0; i < size; i++ {
_elem4 := &BaggageRestriction{}
if err := _elem4.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem4), err)
}
p.Success = append(p.Success, _elem4)
}
if err := iprot.ReadListEnd(); err != nil {
return thrift.PrependError("error reading list end: ", err)
}
return nil
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("getBaggageRestrictions_result"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField0(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) writeField0(oprot thrift.TProtocol) (err error) {
if p.IsSetSuccess() {
if err := oprot.WriteFieldBegin("success", thrift.LIST, 0); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err)
}
if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Success)); err != nil {
return thrift.PrependError("error writing list begin: ", err)
}
for _, v := range p.Success {
if err := v.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
}
}
if err := oprot.WriteListEnd(); err != nil {
return thrift.PrependError("error writing list end: ", err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err)
}
}
return err
}
func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("BaggageRestrictionManagerGetBaggageRestrictionsResult(%+v)", *p)
}

18
vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/constants.go generated vendored Normal file
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@ -0,0 +1,18 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package baggage
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
func init() {
}

154
vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/ttypes.go generated vendored Normal file
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@ -0,0 +1,154 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package baggage
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
var GoUnusedProtection__ int
// Attributes:
// - BaggageKey
// - MaxValueLength
type BaggageRestriction struct {
BaggageKey string `thrift:"baggageKey,1,required" json:"baggageKey"`
MaxValueLength int32 `thrift:"maxValueLength,2,required" json:"maxValueLength"`
}
func NewBaggageRestriction() *BaggageRestriction {
return &BaggageRestriction{}
}
func (p *BaggageRestriction) GetBaggageKey() string {
return p.BaggageKey
}
func (p *BaggageRestriction) GetMaxValueLength() int32 {
return p.MaxValueLength
}
func (p *BaggageRestriction) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
var issetBaggageKey bool = false
var issetMaxValueLength bool = false
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
issetBaggageKey = true
case 2:
if err := p.readField2(iprot); err != nil {
return err
}
issetMaxValueLength = true
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
if !issetBaggageKey {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field BaggageKey is not set"))
}
if !issetMaxValueLength {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field MaxValueLength is not set"))
}
return nil
}
func (p *BaggageRestriction) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadString(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
p.BaggageKey = v
}
return nil
}
func (p *BaggageRestriction) readField2(iprot thrift.TProtocol) error {
if v, err := iprot.ReadI32(); err != nil {
return thrift.PrependError("error reading field 2: ", err)
} else {
p.MaxValueLength = v
}
return nil
}
func (p *BaggageRestriction) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("BaggageRestriction"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := p.writeField2(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *BaggageRestriction) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("baggageKey", thrift.STRING, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:baggageKey: ", p), err)
}
if err := oprot.WriteString(string(p.BaggageKey)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.baggageKey (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:baggageKey: ", p), err)
}
return err
}
func (p *BaggageRestriction) writeField2(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("maxValueLength", thrift.I32, 2); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:maxValueLength: ", p), err)
}
if err := oprot.WriteI32(int32(p.MaxValueLength)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.maxValueLength (2) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 2:maxValueLength: ", p), err)
}
return err
}
func (p *BaggageRestriction) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("BaggageRestriction(%+v)", *p)
}

242
vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/agent.go generated vendored Normal file
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@ -0,0 +1,242 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package jaeger
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
type Agent interface {
// Parameters:
// - Batch
EmitBatch(batch *Batch) (err error)
}
type AgentClient struct {
Transport thrift.TTransport
ProtocolFactory thrift.TProtocolFactory
InputProtocol thrift.TProtocol
OutputProtocol thrift.TProtocol
SeqId int32
}
func NewAgentClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *AgentClient {
return &AgentClient{Transport: t,
ProtocolFactory: f,
InputProtocol: f.GetProtocol(t),
OutputProtocol: f.GetProtocol(t),
SeqId: 0,
}
}
func NewAgentClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *AgentClient {
return &AgentClient{Transport: t,
ProtocolFactory: nil,
InputProtocol: iprot,
OutputProtocol: oprot,
SeqId: 0,
}
}
// Parameters:
// - Batch
func (p *AgentClient) EmitBatch(batch *Batch) (err error) {
if err = p.sendEmitBatch(batch); err != nil {
return
}
return
}
func (p *AgentClient) sendEmitBatch(batch *Batch) (err error) {
oprot := p.OutputProtocol
if oprot == nil {
oprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.OutputProtocol = oprot
}
p.SeqId++
if err = oprot.WriteMessageBegin("emitBatch", thrift.ONEWAY, p.SeqId); err != nil {
return
}
args := AgentEmitBatchArgs{
Batch: batch,
}
if err = args.Write(oprot); err != nil {
return
}
if err = oprot.WriteMessageEnd(); err != nil {
return
}
return oprot.Flush()
}
type AgentProcessor struct {
processorMap map[string]thrift.TProcessorFunction
handler Agent
}
func (p *AgentProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
p.processorMap[key] = processor
}
func (p *AgentProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
processor, ok = p.processorMap[key]
return processor, ok
}
func (p *AgentProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
return p.processorMap
}
func NewAgentProcessor(handler Agent) *AgentProcessor {
self6 := &AgentProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
self6.processorMap["emitBatch"] = &agentProcessorEmitBatch{handler: handler}
return self6
}
func (p *AgentProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
name, _, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return false, err
}
if processor, ok := p.GetProcessorFunction(name); ok {
return processor.Process(seqId, iprot, oprot)
}
iprot.Skip(thrift.STRUCT)
iprot.ReadMessageEnd()
x7 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
x7.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, x7
}
type agentProcessorEmitBatch struct {
handler Agent
}
func (p *agentProcessorEmitBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
args := AgentEmitBatchArgs{}
if err = args.Read(iprot); err != nil {
iprot.ReadMessageEnd()
return false, err
}
iprot.ReadMessageEnd()
var err2 error
if err2 = p.handler.EmitBatch(args.Batch); err2 != nil {
return true, err2
}
return true, nil
}
// HELPER FUNCTIONS AND STRUCTURES
// Attributes:
// - Batch
type AgentEmitBatchArgs struct {
Batch *Batch `thrift:"batch,1" json:"batch"`
}
func NewAgentEmitBatchArgs() *AgentEmitBatchArgs {
return &AgentEmitBatchArgs{}
}
var AgentEmitBatchArgs_Batch_DEFAULT *Batch
func (p *AgentEmitBatchArgs) GetBatch() *Batch {
if !p.IsSetBatch() {
return AgentEmitBatchArgs_Batch_DEFAULT
}
return p.Batch
}
func (p *AgentEmitBatchArgs) IsSetBatch() bool {
return p.Batch != nil
}
func (p *AgentEmitBatchArgs) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *AgentEmitBatchArgs) readField1(iprot thrift.TProtocol) error {
p.Batch = &Batch{}
if err := p.Batch.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Batch), err)
}
return nil
}
func (p *AgentEmitBatchArgs) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("emitBatch_args"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *AgentEmitBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("batch", thrift.STRUCT, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:batch: ", p), err)
}
if err := p.Batch.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Batch), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:batch: ", p), err)
}
return err
}
func (p *AgentEmitBatchArgs) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("AgentEmitBatchArgs(%+v)", *p)
}

18
vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/constants.go generated vendored Normal file
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@ -0,0 +1,18 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package jaeger
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
func init() {
}

1838
vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/ttypes.go generated vendored Normal file
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File diff suppressed because it is too large Load Diff

18
vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/constants.go generated vendored Normal file
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@ -0,0 +1,18 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package sampling
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
func init() {
}

410
vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/samplingmanager.go generated vendored Normal file
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@ -0,0 +1,410 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package sampling
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
type SamplingManager interface {
// Parameters:
// - ServiceName
GetSamplingStrategy(serviceName string) (r *SamplingStrategyResponse, err error)
}
type SamplingManagerClient struct {
Transport thrift.TTransport
ProtocolFactory thrift.TProtocolFactory
InputProtocol thrift.TProtocol
OutputProtocol thrift.TProtocol
SeqId int32
}
func NewSamplingManagerClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *SamplingManagerClient {
return &SamplingManagerClient{Transport: t,
ProtocolFactory: f,
InputProtocol: f.GetProtocol(t),
OutputProtocol: f.GetProtocol(t),
SeqId: 0,
}
}
func NewSamplingManagerClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *SamplingManagerClient {
return &SamplingManagerClient{Transport: t,
ProtocolFactory: nil,
InputProtocol: iprot,
OutputProtocol: oprot,
SeqId: 0,
}
}
// Parameters:
// - ServiceName
func (p *SamplingManagerClient) GetSamplingStrategy(serviceName string) (r *SamplingStrategyResponse, err error) {
if err = p.sendGetSamplingStrategy(serviceName); err != nil {
return
}
return p.recvGetSamplingStrategy()
}
func (p *SamplingManagerClient) sendGetSamplingStrategy(serviceName string) (err error) {
oprot := p.OutputProtocol
if oprot == nil {
oprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.OutputProtocol = oprot
}
p.SeqId++
if err = oprot.WriteMessageBegin("getSamplingStrategy", thrift.CALL, p.SeqId); err != nil {
return
}
args := SamplingManagerGetSamplingStrategyArgs{
ServiceName: serviceName,
}
if err = args.Write(oprot); err != nil {
return
}
if err = oprot.WriteMessageEnd(); err != nil {
return
}
return oprot.Flush()
}
func (p *SamplingManagerClient) recvGetSamplingStrategy() (value *SamplingStrategyResponse, err error) {
iprot := p.InputProtocol
if iprot == nil {
iprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.InputProtocol = iprot
}
method, mTypeId, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return
}
if method != "getSamplingStrategy" {
err = thrift.NewTApplicationException(thrift.WRONG_METHOD_NAME, "getSamplingStrategy failed: wrong method name")
return
}
if p.SeqId != seqId {
err = thrift.NewTApplicationException(thrift.BAD_SEQUENCE_ID, "getSamplingStrategy failed: out of sequence response")
return
}
if mTypeId == thrift.EXCEPTION {
error1 := thrift.NewTApplicationException(thrift.UNKNOWN_APPLICATION_EXCEPTION, "Unknown Exception")
var error2 error
error2, err = error1.Read(iprot)
if err != nil {
return
}
if err = iprot.ReadMessageEnd(); err != nil {
return
}
err = error2
return
}
if mTypeId != thrift.REPLY {
err = thrift.NewTApplicationException(thrift.INVALID_MESSAGE_TYPE_EXCEPTION, "getSamplingStrategy failed: invalid message type")
return
}
result := SamplingManagerGetSamplingStrategyResult{}
if err = result.Read(iprot); err != nil {
return
}
if err = iprot.ReadMessageEnd(); err != nil {
return
}
value = result.GetSuccess()
return
}
type SamplingManagerProcessor struct {
processorMap map[string]thrift.TProcessorFunction
handler SamplingManager
}
func (p *SamplingManagerProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
p.processorMap[key] = processor
}
func (p *SamplingManagerProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
processor, ok = p.processorMap[key]
return processor, ok
}
func (p *SamplingManagerProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
return p.processorMap
}
func NewSamplingManagerProcessor(handler SamplingManager) *SamplingManagerProcessor {
self3 := &SamplingManagerProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
self3.processorMap["getSamplingStrategy"] = &samplingManagerProcessorGetSamplingStrategy{handler: handler}
return self3
}
func (p *SamplingManagerProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
name, _, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return false, err
}
if processor, ok := p.GetProcessorFunction(name); ok {
return processor.Process(seqId, iprot, oprot)
}
iprot.Skip(thrift.STRUCT)
iprot.ReadMessageEnd()
x4 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
x4.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, x4
}
type samplingManagerProcessorGetSamplingStrategy struct {
handler SamplingManager
}
func (p *samplingManagerProcessorGetSamplingStrategy) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
args := SamplingManagerGetSamplingStrategyArgs{}
if err = args.Read(iprot); err != nil {
iprot.ReadMessageEnd()
x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err.Error())
oprot.WriteMessageBegin("getSamplingStrategy", thrift.EXCEPTION, seqId)
x.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, err
}
iprot.ReadMessageEnd()
result := SamplingManagerGetSamplingStrategyResult{}
var retval *SamplingStrategyResponse
var err2 error
if retval, err2 = p.handler.GetSamplingStrategy(args.ServiceName); err2 != nil {
x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing getSamplingStrategy: "+err2.Error())
oprot.WriteMessageBegin("getSamplingStrategy", thrift.EXCEPTION, seqId)
x.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return true, err2
} else {
result.Success = retval
}
if err2 = oprot.WriteMessageBegin("getSamplingStrategy", thrift.REPLY, seqId); err2 != nil {
err = err2
}
if err2 = result.Write(oprot); err == nil && err2 != nil {
err = err2
}
if err2 = oprot.WriteMessageEnd(); err == nil && err2 != nil {
err = err2
}
if err2 = oprot.Flush(); err == nil && err2 != nil {
err = err2
}
if err != nil {
return
}
return true, err
}
// HELPER FUNCTIONS AND STRUCTURES
// Attributes:
// - ServiceName
type SamplingManagerGetSamplingStrategyArgs struct {
ServiceName string `thrift:"serviceName,1" json:"serviceName"`
}
func NewSamplingManagerGetSamplingStrategyArgs() *SamplingManagerGetSamplingStrategyArgs {
return &SamplingManagerGetSamplingStrategyArgs{}
}
func (p *SamplingManagerGetSamplingStrategyArgs) GetServiceName() string {
return p.ServiceName
}
func (p *SamplingManagerGetSamplingStrategyArgs) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *SamplingManagerGetSamplingStrategyArgs) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadString(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
p.ServiceName = v
}
return nil
}
func (p *SamplingManagerGetSamplingStrategyArgs) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("getSamplingStrategy_args"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *SamplingManagerGetSamplingStrategyArgs) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("serviceName", thrift.STRING, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err)
}
if err := oprot.WriteString(string(p.ServiceName)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err)
}
return err
}
func (p *SamplingManagerGetSamplingStrategyArgs) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("SamplingManagerGetSamplingStrategyArgs(%+v)", *p)
}
// Attributes:
// - Success
type SamplingManagerGetSamplingStrategyResult struct {
Success *SamplingStrategyResponse `thrift:"success,0" json:"success,omitempty"`
}
func NewSamplingManagerGetSamplingStrategyResult() *SamplingManagerGetSamplingStrategyResult {
return &SamplingManagerGetSamplingStrategyResult{}
}
var SamplingManagerGetSamplingStrategyResult_Success_DEFAULT *SamplingStrategyResponse
func (p *SamplingManagerGetSamplingStrategyResult) GetSuccess() *SamplingStrategyResponse {
if !p.IsSetSuccess() {
return SamplingManagerGetSamplingStrategyResult_Success_DEFAULT
}
return p.Success
}
func (p *SamplingManagerGetSamplingStrategyResult) IsSetSuccess() bool {
return p.Success != nil
}
func (p *SamplingManagerGetSamplingStrategyResult) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 0:
if err := p.readField0(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *SamplingManagerGetSamplingStrategyResult) readField0(iprot thrift.TProtocol) error {
p.Success = &SamplingStrategyResponse{}
if err := p.Success.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Success), err)
}
return nil
}
func (p *SamplingManagerGetSamplingStrategyResult) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("getSamplingStrategy_result"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField0(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *SamplingManagerGetSamplingStrategyResult) writeField0(oprot thrift.TProtocol) (err error) {
if p.IsSetSuccess() {
if err := oprot.WriteFieldBegin("success", thrift.STRUCT, 0); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err)
}
if err := p.Success.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Success), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err)
}
}
return err
}
func (p *SamplingManagerGetSamplingStrategyResult) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("SamplingManagerGetSamplingStrategyResult(%+v)", *p)
}

873
vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/ttypes.go generated vendored Normal file
View File

@ -0,0 +1,873 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package sampling
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
var GoUnusedProtection__ int
type SamplingStrategyType int64
const (
SamplingStrategyType_PROBABILISTIC SamplingStrategyType = 0
SamplingStrategyType_RATE_LIMITING SamplingStrategyType = 1
)
func (p SamplingStrategyType) String() string {
switch p {
case SamplingStrategyType_PROBABILISTIC:
return "PROBABILISTIC"
case SamplingStrategyType_RATE_LIMITING:
return "RATE_LIMITING"
}
return "<UNSET>"
}
func SamplingStrategyTypeFromString(s string) (SamplingStrategyType, error) {
switch s {
case "PROBABILISTIC":
return SamplingStrategyType_PROBABILISTIC, nil
case "RATE_LIMITING":
return SamplingStrategyType_RATE_LIMITING, nil
}
return SamplingStrategyType(0), fmt.Errorf("not a valid SamplingStrategyType string")
}
func SamplingStrategyTypePtr(v SamplingStrategyType) *SamplingStrategyType { return &v }
func (p SamplingStrategyType) MarshalText() ([]byte, error) {
return []byte(p.String()), nil
}
func (p *SamplingStrategyType) UnmarshalText(text []byte) error {
q, err := SamplingStrategyTypeFromString(string(text))
if err != nil {
return err
}
*p = q
return nil
}
// Attributes:
// - SamplingRate
type ProbabilisticSamplingStrategy struct {
SamplingRate float64 `thrift:"samplingRate,1,required" json:"samplingRate"`
}
func NewProbabilisticSamplingStrategy() *ProbabilisticSamplingStrategy {
return &ProbabilisticSamplingStrategy{}
}
func (p *ProbabilisticSamplingStrategy) GetSamplingRate() float64 {
return p.SamplingRate
}
func (p *ProbabilisticSamplingStrategy) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
var issetSamplingRate bool = false
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
issetSamplingRate = true
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
if !issetSamplingRate {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field SamplingRate is not set"))
}
return nil
}
func (p *ProbabilisticSamplingStrategy) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadDouble(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
p.SamplingRate = v
}
return nil
}
func (p *ProbabilisticSamplingStrategy) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("ProbabilisticSamplingStrategy"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *ProbabilisticSamplingStrategy) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("samplingRate", thrift.DOUBLE, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:samplingRate: ", p), err)
}
if err := oprot.WriteDouble(float64(p.SamplingRate)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.samplingRate (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:samplingRate: ", p), err)
}
return err
}
func (p *ProbabilisticSamplingStrategy) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("ProbabilisticSamplingStrategy(%+v)", *p)
}
// Attributes:
// - MaxTracesPerSecond
type RateLimitingSamplingStrategy struct {
MaxTracesPerSecond int16 `thrift:"maxTracesPerSecond,1,required" json:"maxTracesPerSecond"`
}
func NewRateLimitingSamplingStrategy() *RateLimitingSamplingStrategy {
return &RateLimitingSamplingStrategy{}
}
func (p *RateLimitingSamplingStrategy) GetMaxTracesPerSecond() int16 {
return p.MaxTracesPerSecond
}
func (p *RateLimitingSamplingStrategy) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
var issetMaxTracesPerSecond bool = false
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
issetMaxTracesPerSecond = true
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
if !issetMaxTracesPerSecond {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field MaxTracesPerSecond is not set"))
}
return nil
}
func (p *RateLimitingSamplingStrategy) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadI16(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
p.MaxTracesPerSecond = v
}
return nil
}
func (p *RateLimitingSamplingStrategy) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("RateLimitingSamplingStrategy"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *RateLimitingSamplingStrategy) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("maxTracesPerSecond", thrift.I16, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:maxTracesPerSecond: ", p), err)
}
if err := oprot.WriteI16(int16(p.MaxTracesPerSecond)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.maxTracesPerSecond (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:maxTracesPerSecond: ", p), err)
}
return err
}
func (p *RateLimitingSamplingStrategy) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("RateLimitingSamplingStrategy(%+v)", *p)
}
// Attributes:
// - Operation
// - ProbabilisticSampling
type OperationSamplingStrategy struct {
Operation string `thrift:"operation,1,required" json:"operation"`
ProbabilisticSampling *ProbabilisticSamplingStrategy `thrift:"probabilisticSampling,2,required" json:"probabilisticSampling"`
}
func NewOperationSamplingStrategy() *OperationSamplingStrategy {
return &OperationSamplingStrategy{}
}
func (p *OperationSamplingStrategy) GetOperation() string {
return p.Operation
}
var OperationSamplingStrategy_ProbabilisticSampling_DEFAULT *ProbabilisticSamplingStrategy
func (p *OperationSamplingStrategy) GetProbabilisticSampling() *ProbabilisticSamplingStrategy {
if !p.IsSetProbabilisticSampling() {
return OperationSamplingStrategy_ProbabilisticSampling_DEFAULT
}
return p.ProbabilisticSampling
}
func (p *OperationSamplingStrategy) IsSetProbabilisticSampling() bool {
return p.ProbabilisticSampling != nil
}
func (p *OperationSamplingStrategy) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
var issetOperation bool = false
var issetProbabilisticSampling bool = false
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
issetOperation = true
case 2:
if err := p.readField2(iprot); err != nil {
return err
}
issetProbabilisticSampling = true
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
if !issetOperation {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Operation is not set"))
}
if !issetProbabilisticSampling {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field ProbabilisticSampling is not set"))
}
return nil
}
func (p *OperationSamplingStrategy) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadString(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
p.Operation = v
}
return nil
}
func (p *OperationSamplingStrategy) readField2(iprot thrift.TProtocol) error {
p.ProbabilisticSampling = &ProbabilisticSamplingStrategy{}
if err := p.ProbabilisticSampling.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.ProbabilisticSampling), err)
}
return nil
}
func (p *OperationSamplingStrategy) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("OperationSamplingStrategy"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := p.writeField2(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *OperationSamplingStrategy) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("operation", thrift.STRING, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:operation: ", p), err)
}
if err := oprot.WriteString(string(p.Operation)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.operation (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:operation: ", p), err)
}
return err
}
func (p *OperationSamplingStrategy) writeField2(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("probabilisticSampling", thrift.STRUCT, 2); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:probabilisticSampling: ", p), err)
}
if err := p.ProbabilisticSampling.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.ProbabilisticSampling), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 2:probabilisticSampling: ", p), err)
}
return err
}
func (p *OperationSamplingStrategy) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("OperationSamplingStrategy(%+v)", *p)
}
// Attributes:
// - DefaultSamplingProbability
// - DefaultLowerBoundTracesPerSecond
// - PerOperationStrategies
// - DefaultUpperBoundTracesPerSecond
type PerOperationSamplingStrategies struct {
DefaultSamplingProbability float64 `thrift:"defaultSamplingProbability,1,required" json:"defaultSamplingProbability"`
DefaultLowerBoundTracesPerSecond float64 `thrift:"defaultLowerBoundTracesPerSecond,2,required" json:"defaultLowerBoundTracesPerSecond"`
PerOperationStrategies []*OperationSamplingStrategy `thrift:"perOperationStrategies,3,required" json:"perOperationStrategies"`
DefaultUpperBoundTracesPerSecond *float64 `thrift:"defaultUpperBoundTracesPerSecond,4" json:"defaultUpperBoundTracesPerSecond,omitempty"`
}
func NewPerOperationSamplingStrategies() *PerOperationSamplingStrategies {
return &PerOperationSamplingStrategies{}
}
func (p *PerOperationSamplingStrategies) GetDefaultSamplingProbability() float64 {
return p.DefaultSamplingProbability
}
func (p *PerOperationSamplingStrategies) GetDefaultLowerBoundTracesPerSecond() float64 {
return p.DefaultLowerBoundTracesPerSecond
}
func (p *PerOperationSamplingStrategies) GetPerOperationStrategies() []*OperationSamplingStrategy {
return p.PerOperationStrategies
}
var PerOperationSamplingStrategies_DefaultUpperBoundTracesPerSecond_DEFAULT float64
func (p *PerOperationSamplingStrategies) GetDefaultUpperBoundTracesPerSecond() float64 {
if !p.IsSetDefaultUpperBoundTracesPerSecond() {
return PerOperationSamplingStrategies_DefaultUpperBoundTracesPerSecond_DEFAULT
}
return *p.DefaultUpperBoundTracesPerSecond
}
func (p *PerOperationSamplingStrategies) IsSetDefaultUpperBoundTracesPerSecond() bool {
return p.DefaultUpperBoundTracesPerSecond != nil
}
func (p *PerOperationSamplingStrategies) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
var issetDefaultSamplingProbability bool = false
var issetDefaultLowerBoundTracesPerSecond bool = false
var issetPerOperationStrategies bool = false
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
issetDefaultSamplingProbability = true
case 2:
if err := p.readField2(iprot); err != nil {
return err
}
issetDefaultLowerBoundTracesPerSecond = true
case 3:
if err := p.readField3(iprot); err != nil {
return err
}
issetPerOperationStrategies = true
case 4:
if err := p.readField4(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
if !issetDefaultSamplingProbability {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field DefaultSamplingProbability is not set"))
}
if !issetDefaultLowerBoundTracesPerSecond {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field DefaultLowerBoundTracesPerSecond is not set"))
}
if !issetPerOperationStrategies {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field PerOperationStrategies is not set"))
}
return nil
}
func (p *PerOperationSamplingStrategies) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadDouble(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
p.DefaultSamplingProbability = v
}
return nil
}
func (p *PerOperationSamplingStrategies) readField2(iprot thrift.TProtocol) error {
if v, err := iprot.ReadDouble(); err != nil {
return thrift.PrependError("error reading field 2: ", err)
} else {
p.DefaultLowerBoundTracesPerSecond = v
}
return nil
}
func (p *PerOperationSamplingStrategies) readField3(iprot thrift.TProtocol) error {
_, size, err := iprot.ReadListBegin()
if err != nil {
return thrift.PrependError("error reading list begin: ", err)
}
tSlice := make([]*OperationSamplingStrategy, 0, size)
p.PerOperationStrategies = tSlice
for i := 0; i < size; i++ {
_elem0 := &OperationSamplingStrategy{}
if err := _elem0.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem0), err)
}
p.PerOperationStrategies = append(p.PerOperationStrategies, _elem0)
}
if err := iprot.ReadListEnd(); err != nil {
return thrift.PrependError("error reading list end: ", err)
}
return nil
}
func (p *PerOperationSamplingStrategies) readField4(iprot thrift.TProtocol) error {
if v, err := iprot.ReadDouble(); err != nil {
return thrift.PrependError("error reading field 4: ", err)
} else {
p.DefaultUpperBoundTracesPerSecond = &v
}
return nil
}
func (p *PerOperationSamplingStrategies) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("PerOperationSamplingStrategies"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := p.writeField2(oprot); err != nil {
return err
}
if err := p.writeField3(oprot); err != nil {
return err
}
if err := p.writeField4(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *PerOperationSamplingStrategies) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("defaultSamplingProbability", thrift.DOUBLE, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:defaultSamplingProbability: ", p), err)
}
if err := oprot.WriteDouble(float64(p.DefaultSamplingProbability)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.defaultSamplingProbability (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:defaultSamplingProbability: ", p), err)
}
return err
}
func (p *PerOperationSamplingStrategies) writeField2(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("defaultLowerBoundTracesPerSecond", thrift.DOUBLE, 2); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:defaultLowerBoundTracesPerSecond: ", p), err)
}
if err := oprot.WriteDouble(float64(p.DefaultLowerBoundTracesPerSecond)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.defaultLowerBoundTracesPerSecond (2) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 2:defaultLowerBoundTracesPerSecond: ", p), err)
}
return err
}
func (p *PerOperationSamplingStrategies) writeField3(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("perOperationStrategies", thrift.LIST, 3); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:perOperationStrategies: ", p), err)
}
if err := oprot.WriteListBegin(thrift.STRUCT, len(p.PerOperationStrategies)); err != nil {
return thrift.PrependError("error writing list begin: ", err)
}
for _, v := range p.PerOperationStrategies {
if err := v.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
}
}
if err := oprot.WriteListEnd(); err != nil {
return thrift.PrependError("error writing list end: ", err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 3:perOperationStrategies: ", p), err)
}
return err
}
func (p *PerOperationSamplingStrategies) writeField4(oprot thrift.TProtocol) (err error) {
if p.IsSetDefaultUpperBoundTracesPerSecond() {
if err := oprot.WriteFieldBegin("defaultUpperBoundTracesPerSecond", thrift.DOUBLE, 4); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:defaultUpperBoundTracesPerSecond: ", p), err)
}
if err := oprot.WriteDouble(float64(*p.DefaultUpperBoundTracesPerSecond)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.defaultUpperBoundTracesPerSecond (4) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 4:defaultUpperBoundTracesPerSecond: ", p), err)
}
}
return err
}
func (p *PerOperationSamplingStrategies) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("PerOperationSamplingStrategies(%+v)", *p)
}
// Attributes:
// - StrategyType
// - ProbabilisticSampling
// - RateLimitingSampling
// - OperationSampling
type SamplingStrategyResponse struct {
StrategyType SamplingStrategyType `thrift:"strategyType,1,required" json:"strategyType"`
ProbabilisticSampling *ProbabilisticSamplingStrategy `thrift:"probabilisticSampling,2" json:"probabilisticSampling,omitempty"`
RateLimitingSampling *RateLimitingSamplingStrategy `thrift:"rateLimitingSampling,3" json:"rateLimitingSampling,omitempty"`
OperationSampling *PerOperationSamplingStrategies `thrift:"operationSampling,4" json:"operationSampling,omitempty"`
}
func NewSamplingStrategyResponse() *SamplingStrategyResponse {
return &SamplingStrategyResponse{}
}
func (p *SamplingStrategyResponse) GetStrategyType() SamplingStrategyType {
return p.StrategyType
}
var SamplingStrategyResponse_ProbabilisticSampling_DEFAULT *ProbabilisticSamplingStrategy
func (p *SamplingStrategyResponse) GetProbabilisticSampling() *ProbabilisticSamplingStrategy {
if !p.IsSetProbabilisticSampling() {
return SamplingStrategyResponse_ProbabilisticSampling_DEFAULT
}
return p.ProbabilisticSampling
}
var SamplingStrategyResponse_RateLimitingSampling_DEFAULT *RateLimitingSamplingStrategy
func (p *SamplingStrategyResponse) GetRateLimitingSampling() *RateLimitingSamplingStrategy {
if !p.IsSetRateLimitingSampling() {
return SamplingStrategyResponse_RateLimitingSampling_DEFAULT
}
return p.RateLimitingSampling
}
var SamplingStrategyResponse_OperationSampling_DEFAULT *PerOperationSamplingStrategies
func (p *SamplingStrategyResponse) GetOperationSampling() *PerOperationSamplingStrategies {
if !p.IsSetOperationSampling() {
return SamplingStrategyResponse_OperationSampling_DEFAULT
}
return p.OperationSampling
}
func (p *SamplingStrategyResponse) IsSetProbabilisticSampling() bool {
return p.ProbabilisticSampling != nil
}
func (p *SamplingStrategyResponse) IsSetRateLimitingSampling() bool {
return p.RateLimitingSampling != nil
}
func (p *SamplingStrategyResponse) IsSetOperationSampling() bool {
return p.OperationSampling != nil
}
func (p *SamplingStrategyResponse) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
var issetStrategyType bool = false
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
issetStrategyType = true
case 2:
if err := p.readField2(iprot); err != nil {
return err
}
case 3:
if err := p.readField3(iprot); err != nil {
return err
}
case 4:
if err := p.readField4(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
if !issetStrategyType {
return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field StrategyType is not set"))
}
return nil
}
func (p *SamplingStrategyResponse) readField1(iprot thrift.TProtocol) error {
if v, err := iprot.ReadI32(); err != nil {
return thrift.PrependError("error reading field 1: ", err)
} else {
temp := SamplingStrategyType(v)
p.StrategyType = temp
}
return nil
}
func (p *SamplingStrategyResponse) readField2(iprot thrift.TProtocol) error {
p.ProbabilisticSampling = &ProbabilisticSamplingStrategy{}
if err := p.ProbabilisticSampling.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.ProbabilisticSampling), err)
}
return nil
}
func (p *SamplingStrategyResponse) readField3(iprot thrift.TProtocol) error {
p.RateLimitingSampling = &RateLimitingSamplingStrategy{}
if err := p.RateLimitingSampling.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.RateLimitingSampling), err)
}
return nil
}
func (p *SamplingStrategyResponse) readField4(iprot thrift.TProtocol) error {
p.OperationSampling = &PerOperationSamplingStrategies{}
if err := p.OperationSampling.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.OperationSampling), err)
}
return nil
}
func (p *SamplingStrategyResponse) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("SamplingStrategyResponse"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := p.writeField2(oprot); err != nil {
return err
}
if err := p.writeField3(oprot); err != nil {
return err
}
if err := p.writeField4(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *SamplingStrategyResponse) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("strategyType", thrift.I32, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:strategyType: ", p), err)
}
if err := oprot.WriteI32(int32(p.StrategyType)); err != nil {
return thrift.PrependError(fmt.Sprintf("%T.strategyType (1) field write error: ", p), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:strategyType: ", p), err)
}
return err
}
func (p *SamplingStrategyResponse) writeField2(oprot thrift.TProtocol) (err error) {
if p.IsSetProbabilisticSampling() {
if err := oprot.WriteFieldBegin("probabilisticSampling", thrift.STRUCT, 2); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:probabilisticSampling: ", p), err)
}
if err := p.ProbabilisticSampling.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.ProbabilisticSampling), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 2:probabilisticSampling: ", p), err)
}
}
return err
}
func (p *SamplingStrategyResponse) writeField3(oprot thrift.TProtocol) (err error) {
if p.IsSetRateLimitingSampling() {
if err := oprot.WriteFieldBegin("rateLimitingSampling", thrift.STRUCT, 3); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:rateLimitingSampling: ", p), err)
}
if err := p.RateLimitingSampling.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.RateLimitingSampling), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 3:rateLimitingSampling: ", p), err)
}
}
return err
}
func (p *SamplingStrategyResponse) writeField4(oprot thrift.TProtocol) (err error) {
if p.IsSetOperationSampling() {
if err := oprot.WriteFieldBegin("operationSampling", thrift.STRUCT, 4); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:operationSampling: ", p), err)
}
if err := p.OperationSampling.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.OperationSampling), err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 4:operationSampling: ", p), err)
}
}
return err
}
func (p *SamplingStrategyResponse) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("SamplingStrategyResponse(%+v)", *p)
}

32
vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go generated vendored Normal file
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@ -0,0 +1,32 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package zipkincore
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
const CLIENT_SEND = "cs"
const CLIENT_RECV = "cr"
const SERVER_SEND = "ss"
const SERVER_RECV = "sr"
const WIRE_SEND = "ws"
const WIRE_RECV = "wr"
const CLIENT_SEND_FRAGMENT = "csf"
const CLIENT_RECV_FRAGMENT = "crf"
const SERVER_SEND_FRAGMENT = "ssf"
const SERVER_RECV_FRAGMENT = "srf"
const LOCAL_COMPONENT = "lc"
const CLIENT_ADDR = "ca"
const SERVER_ADDR = "sa"
func init() {
}

1247
vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go generated vendored Normal file
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446
vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincollector.go generated vendored Normal file
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@ -0,0 +1,446 @@
// Autogenerated by Thrift Compiler (0.9.3)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
package zipkincore
import (
"bytes"
"fmt"
"github.com/uber/jaeger-client-go/thrift"
)
// (needed to ensure safety because of naive import list construction.)
var _ = thrift.ZERO
var _ = fmt.Printf
var _ = bytes.Equal
type ZipkinCollector interface {
// Parameters:
// - Spans
SubmitZipkinBatch(spans []*Span) (r []*Response, err error)
}
type ZipkinCollectorClient struct {
Transport thrift.TTransport
ProtocolFactory thrift.TProtocolFactory
InputProtocol thrift.TProtocol
OutputProtocol thrift.TProtocol
SeqId int32
}
func NewZipkinCollectorClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *ZipkinCollectorClient {
return &ZipkinCollectorClient{Transport: t,
ProtocolFactory: f,
InputProtocol: f.GetProtocol(t),
OutputProtocol: f.GetProtocol(t),
SeqId: 0,
}
}
func NewZipkinCollectorClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *ZipkinCollectorClient {
return &ZipkinCollectorClient{Transport: t,
ProtocolFactory: nil,
InputProtocol: iprot,
OutputProtocol: oprot,
SeqId: 0,
}
}
// Parameters:
// - Spans
func (p *ZipkinCollectorClient) SubmitZipkinBatch(spans []*Span) (r []*Response, err error) {
if err = p.sendSubmitZipkinBatch(spans); err != nil {
return
}
return p.recvSubmitZipkinBatch()
}
func (p *ZipkinCollectorClient) sendSubmitZipkinBatch(spans []*Span) (err error) {
oprot := p.OutputProtocol
if oprot == nil {
oprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.OutputProtocol = oprot
}
p.SeqId++
if err = oprot.WriteMessageBegin("submitZipkinBatch", thrift.CALL, p.SeqId); err != nil {
return
}
args := ZipkinCollectorSubmitZipkinBatchArgs{
Spans: spans,
}
if err = args.Write(oprot); err != nil {
return
}
if err = oprot.WriteMessageEnd(); err != nil {
return
}
return oprot.Flush()
}
func (p *ZipkinCollectorClient) recvSubmitZipkinBatch() (value []*Response, err error) {
iprot := p.InputProtocol
if iprot == nil {
iprot = p.ProtocolFactory.GetProtocol(p.Transport)
p.InputProtocol = iprot
}
method, mTypeId, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return
}
if method != "submitZipkinBatch" {
err = thrift.NewTApplicationException(thrift.WRONG_METHOD_NAME, "submitZipkinBatch failed: wrong method name")
return
}
if p.SeqId != seqId {
err = thrift.NewTApplicationException(thrift.BAD_SEQUENCE_ID, "submitZipkinBatch failed: out of sequence response")
return
}
if mTypeId == thrift.EXCEPTION {
error2 := thrift.NewTApplicationException(thrift.UNKNOWN_APPLICATION_EXCEPTION, "Unknown Exception")
var error3 error
error3, err = error2.Read(iprot)
if err != nil {
return
}
if err = iprot.ReadMessageEnd(); err != nil {
return
}
err = error3
return
}
if mTypeId != thrift.REPLY {
err = thrift.NewTApplicationException(thrift.INVALID_MESSAGE_TYPE_EXCEPTION, "submitZipkinBatch failed: invalid message type")
return
}
result := ZipkinCollectorSubmitZipkinBatchResult{}
if err = result.Read(iprot); err != nil {
return
}
if err = iprot.ReadMessageEnd(); err != nil {
return
}
value = result.GetSuccess()
return
}
type ZipkinCollectorProcessor struct {
processorMap map[string]thrift.TProcessorFunction
handler ZipkinCollector
}
func (p *ZipkinCollectorProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
p.processorMap[key] = processor
}
func (p *ZipkinCollectorProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
processor, ok = p.processorMap[key]
return processor, ok
}
func (p *ZipkinCollectorProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
return p.processorMap
}
func NewZipkinCollectorProcessor(handler ZipkinCollector) *ZipkinCollectorProcessor {
self4 := &ZipkinCollectorProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
self4.processorMap["submitZipkinBatch"] = &zipkinCollectorProcessorSubmitZipkinBatch{handler: handler}
return self4
}
func (p *ZipkinCollectorProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
name, _, seqId, err := iprot.ReadMessageBegin()
if err != nil {
return false, err
}
if processor, ok := p.GetProcessorFunction(name); ok {
return processor.Process(seqId, iprot, oprot)
}
iprot.Skip(thrift.STRUCT)
iprot.ReadMessageEnd()
x5 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
x5.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, x5
}
type zipkinCollectorProcessorSubmitZipkinBatch struct {
handler ZipkinCollector
}
func (p *zipkinCollectorProcessorSubmitZipkinBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
args := ZipkinCollectorSubmitZipkinBatchArgs{}
if err = args.Read(iprot); err != nil {
iprot.ReadMessageEnd()
x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err.Error())
oprot.WriteMessageBegin("submitZipkinBatch", thrift.EXCEPTION, seqId)
x.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return false, err
}
iprot.ReadMessageEnd()
result := ZipkinCollectorSubmitZipkinBatchResult{}
var retval []*Response
var err2 error
if retval, err2 = p.handler.SubmitZipkinBatch(args.Spans); err2 != nil {
x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing submitZipkinBatch: "+err2.Error())
oprot.WriteMessageBegin("submitZipkinBatch", thrift.EXCEPTION, seqId)
x.Write(oprot)
oprot.WriteMessageEnd()
oprot.Flush()
return true, err2
} else {
result.Success = retval
}
if err2 = oprot.WriteMessageBegin("submitZipkinBatch", thrift.REPLY, seqId); err2 != nil {
err = err2
}
if err2 = result.Write(oprot); err == nil && err2 != nil {
err = err2
}
if err2 = oprot.WriteMessageEnd(); err == nil && err2 != nil {
err = err2
}
if err2 = oprot.Flush(); err == nil && err2 != nil {
err = err2
}
if err != nil {
return
}
return true, err
}
// HELPER FUNCTIONS AND STRUCTURES
// Attributes:
// - Spans
type ZipkinCollectorSubmitZipkinBatchArgs struct {
Spans []*Span `thrift:"spans,1" json:"spans"`
}
func NewZipkinCollectorSubmitZipkinBatchArgs() *ZipkinCollectorSubmitZipkinBatchArgs {
return &ZipkinCollectorSubmitZipkinBatchArgs{}
}
func (p *ZipkinCollectorSubmitZipkinBatchArgs) GetSpans() []*Span {
return p.Spans
}
func (p *ZipkinCollectorSubmitZipkinBatchArgs) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 1:
if err := p.readField1(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *ZipkinCollectorSubmitZipkinBatchArgs) readField1(iprot thrift.TProtocol) error {
_, size, err := iprot.ReadListBegin()
if err != nil {
return thrift.PrependError("error reading list begin: ", err)
}
tSlice := make([]*Span, 0, size)
p.Spans = tSlice
for i := 0; i < size; i++ {
_elem6 := &Span{}
if err := _elem6.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem6), err)
}
p.Spans = append(p.Spans, _elem6)
}
if err := iprot.ReadListEnd(); err != nil {
return thrift.PrependError("error reading list end: ", err)
}
return nil
}
func (p *ZipkinCollectorSubmitZipkinBatchArgs) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("submitZipkinBatch_args"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField1(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *ZipkinCollectorSubmitZipkinBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("spans", thrift.LIST, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:spans: ", p), err)
}
if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Spans)); err != nil {
return thrift.PrependError("error writing list begin: ", err)
}
for _, v := range p.Spans {
if err := v.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
}
}
if err := oprot.WriteListEnd(); err != nil {
return thrift.PrependError("error writing list end: ", err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 1:spans: ", p), err)
}
return err
}
func (p *ZipkinCollectorSubmitZipkinBatchArgs) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("ZipkinCollectorSubmitZipkinBatchArgs(%+v)", *p)
}
// Attributes:
// - Success
type ZipkinCollectorSubmitZipkinBatchResult struct {
Success []*Response `thrift:"success,0" json:"success,omitempty"`
}
func NewZipkinCollectorSubmitZipkinBatchResult() *ZipkinCollectorSubmitZipkinBatchResult {
return &ZipkinCollectorSubmitZipkinBatchResult{}
}
var ZipkinCollectorSubmitZipkinBatchResult_Success_DEFAULT []*Response
func (p *ZipkinCollectorSubmitZipkinBatchResult) GetSuccess() []*Response {
return p.Success
}
func (p *ZipkinCollectorSubmitZipkinBatchResult) IsSetSuccess() bool {
return p.Success != nil
}
func (p *ZipkinCollectorSubmitZipkinBatchResult) Read(iprot thrift.TProtocol) error {
if _, err := iprot.ReadStructBegin(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
}
for {
_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
if err != nil {
return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
}
if fieldTypeId == thrift.STOP {
break
}
switch fieldId {
case 0:
if err := p.readField0(iprot); err != nil {
return err
}
default:
if err := iprot.Skip(fieldTypeId); err != nil {
return err
}
}
if err := iprot.ReadFieldEnd(); err != nil {
return err
}
}
if err := iprot.ReadStructEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
}
return nil
}
func (p *ZipkinCollectorSubmitZipkinBatchResult) readField0(iprot thrift.TProtocol) error {
_, size, err := iprot.ReadListBegin()
if err != nil {
return thrift.PrependError("error reading list begin: ", err)
}
tSlice := make([]*Response, 0, size)
p.Success = tSlice
for i := 0; i < size; i++ {
_elem7 := &Response{}
if err := _elem7.Read(iprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem7), err)
}
p.Success = append(p.Success, _elem7)
}
if err := iprot.ReadListEnd(); err != nil {
return thrift.PrependError("error reading list end: ", err)
}
return nil
}
func (p *ZipkinCollectorSubmitZipkinBatchResult) Write(oprot thrift.TProtocol) error {
if err := oprot.WriteStructBegin("submitZipkinBatch_result"); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
}
if err := p.writeField0(oprot); err != nil {
return err
}
if err := oprot.WriteFieldStop(); err != nil {
return thrift.PrependError("write field stop error: ", err)
}
if err := oprot.WriteStructEnd(); err != nil {
return thrift.PrependError("write struct stop error: ", err)
}
return nil
}
func (p *ZipkinCollectorSubmitZipkinBatchResult) writeField0(oprot thrift.TProtocol) (err error) {
if p.IsSetSuccess() {
if err := oprot.WriteFieldBegin("success", thrift.LIST, 0); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err)
}
if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Success)); err != nil {
return thrift.PrependError("error writing list begin: ", err)
}
for _, v := range p.Success {
if err := v.Write(oprot); err != nil {
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
}
}
if err := oprot.WriteListEnd(); err != nil {
return thrift.PrependError("error writing list end: ", err)
}
if err := oprot.WriteFieldEnd(); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err)
}
}
return err
}
func (p *ZipkinCollectorSubmitZipkinBatchResult) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("ZipkinCollectorSubmitZipkinBatchResult(%+v)", *p)
}

7
vendor/github.com/uber/jaeger-client-go/thrift/README.md generated vendored Normal file
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@ -0,0 +1,7 @@
# Apache Thrift
This is a partial copy of Apache Thrift v0.10 (https://github.com/apache/thrift/commit/b2a4d4ae21c789b689dd162deb819665567f481c).
It is vendored code to avoid compatibility issues introduced in Thrift v0.11.
See https://github.com/jaegertracing/jaeger-client-go/pull/303.

142
vendor/github.com/uber/jaeger-client-go/thrift/application_exception.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
const (
UNKNOWN_APPLICATION_EXCEPTION = 0
UNKNOWN_METHOD = 1
INVALID_MESSAGE_TYPE_EXCEPTION = 2
WRONG_METHOD_NAME = 3
BAD_SEQUENCE_ID = 4
MISSING_RESULT = 5
INTERNAL_ERROR = 6
PROTOCOL_ERROR = 7
)
// Application level Thrift exception
type TApplicationException interface {
TException
TypeId() int32
Read(iprot TProtocol) (TApplicationException, error)
Write(oprot TProtocol) error
}
type tApplicationException struct {
message string
type_ int32
}
func (e tApplicationException) Error() string {
return e.message
}
func NewTApplicationException(type_ int32, message string) TApplicationException {
return &tApplicationException{message, type_}
}
func (p *tApplicationException) TypeId() int32 {
return p.type_
}
func (p *tApplicationException) Read(iprot TProtocol) (TApplicationException, error) {
_, err := iprot.ReadStructBegin()
if err != nil {
return nil, err
}
message := ""
type_ := int32(UNKNOWN_APPLICATION_EXCEPTION)
for {
_, ttype, id, err := iprot.ReadFieldBegin()
if err != nil {
return nil, err
}
if ttype == STOP {
break
}
switch id {
case 1:
if ttype == STRING {
if message, err = iprot.ReadString(); err != nil {
return nil, err
}
} else {
if err = SkipDefaultDepth(iprot, ttype); err != nil {
return nil, err
}
}
case 2:
if ttype == I32 {
if type_, err = iprot.ReadI32(); err != nil {
return nil, err
}
} else {
if err = SkipDefaultDepth(iprot, ttype); err != nil {
return nil, err
}
}
default:
if err = SkipDefaultDepth(iprot, ttype); err != nil {
return nil, err
}
}
if err = iprot.ReadFieldEnd(); err != nil {
return nil, err
}
}
return NewTApplicationException(type_, message), iprot.ReadStructEnd()
}
func (p *tApplicationException) Write(oprot TProtocol) (err error) {
err = oprot.WriteStructBegin("TApplicationException")
if len(p.Error()) > 0 {
err = oprot.WriteFieldBegin("message", STRING, 1)
if err != nil {
return
}
err = oprot.WriteString(p.Error())
if err != nil {
return
}
err = oprot.WriteFieldEnd()
if err != nil {
return
}
}
err = oprot.WriteFieldBegin("type", I32, 2)
if err != nil {
return
}
err = oprot.WriteI32(p.type_)
if err != nil {
return
}
err = oprot.WriteFieldEnd()
if err != nil {
return
}
err = oprot.WriteFieldStop()
if err != nil {
return
}
err = oprot.WriteStructEnd()
return
}

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vendor/github.com/uber/jaeger-client-go/thrift/binary_protocol.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"bytes"
"encoding/binary"
"errors"
"fmt"
"io"
"math"
)
type TBinaryProtocol struct {
trans TRichTransport
origTransport TTransport
reader io.Reader
writer io.Writer
strictRead bool
strictWrite bool
buffer [64]byte
}
type TBinaryProtocolFactory struct {
strictRead bool
strictWrite bool
}
func NewTBinaryProtocolTransport(t TTransport) *TBinaryProtocol {
return NewTBinaryProtocol(t, false, true)
}
func NewTBinaryProtocol(t TTransport, strictRead, strictWrite bool) *TBinaryProtocol {
p := &TBinaryProtocol{origTransport: t, strictRead: strictRead, strictWrite: strictWrite}
if et, ok := t.(TRichTransport); ok {
p.trans = et
} else {
p.trans = NewTRichTransport(t)
}
p.reader = p.trans
p.writer = p.trans
return p
}
func NewTBinaryProtocolFactoryDefault() *TBinaryProtocolFactory {
return NewTBinaryProtocolFactory(false, true)
}
func NewTBinaryProtocolFactory(strictRead, strictWrite bool) *TBinaryProtocolFactory {
return &TBinaryProtocolFactory{strictRead: strictRead, strictWrite: strictWrite}
}
func (p *TBinaryProtocolFactory) GetProtocol(t TTransport) TProtocol {
return NewTBinaryProtocol(t, p.strictRead, p.strictWrite)
}
/**
* Writing Methods
*/
func (p *TBinaryProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
if p.strictWrite {
version := uint32(VERSION_1) | uint32(typeId)
e := p.WriteI32(int32(version))
if e != nil {
return e
}
e = p.WriteString(name)
if e != nil {
return e
}
e = p.WriteI32(seqId)
return e
} else {
e := p.WriteString(name)
if e != nil {
return e
}
e = p.WriteByte(int8(typeId))
if e != nil {
return e
}
e = p.WriteI32(seqId)
return e
}
return nil
}
func (p *TBinaryProtocol) WriteMessageEnd() error {
return nil
}
func (p *TBinaryProtocol) WriteStructBegin(name string) error {
return nil
}
func (p *TBinaryProtocol) WriteStructEnd() error {
return nil
}
func (p *TBinaryProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
e := p.WriteByte(int8(typeId))
if e != nil {
return e
}
e = p.WriteI16(id)
return e
}
func (p *TBinaryProtocol) WriteFieldEnd() error {
return nil
}
func (p *TBinaryProtocol) WriteFieldStop() error {
e := p.WriteByte(STOP)
return e
}
func (p *TBinaryProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
e := p.WriteByte(int8(keyType))
if e != nil {
return e
}
e = p.WriteByte(int8(valueType))
if e != nil {
return e
}
e = p.WriteI32(int32(size))
return e
}
func (p *TBinaryProtocol) WriteMapEnd() error {
return nil
}
func (p *TBinaryProtocol) WriteListBegin(elemType TType, size int) error {
e := p.WriteByte(int8(elemType))
if e != nil {
return e
}
e = p.WriteI32(int32(size))
return e
}
func (p *TBinaryProtocol) WriteListEnd() error {
return nil
}
func (p *TBinaryProtocol) WriteSetBegin(elemType TType, size int) error {
e := p.WriteByte(int8(elemType))
if e != nil {
return e
}
e = p.WriteI32(int32(size))
return e
}
func (p *TBinaryProtocol) WriteSetEnd() error {
return nil
}
func (p *TBinaryProtocol) WriteBool(value bool) error {
if value {
return p.WriteByte(1)
}
return p.WriteByte(0)
}
func (p *TBinaryProtocol) WriteByte(value int8) error {
e := p.trans.WriteByte(byte(value))
return NewTProtocolException(e)
}
func (p *TBinaryProtocol) WriteI16(value int16) error {
v := p.buffer[0:2]
binary.BigEndian.PutUint16(v, uint16(value))
_, e := p.writer.Write(v)
return NewTProtocolException(e)
}
func (p *TBinaryProtocol) WriteI32(value int32) error {
v := p.buffer[0:4]
binary.BigEndian.PutUint32(v, uint32(value))
_, e := p.writer.Write(v)
return NewTProtocolException(e)
}
func (p *TBinaryProtocol) WriteI64(value int64) error {
v := p.buffer[0:8]
binary.BigEndian.PutUint64(v, uint64(value))
_, err := p.writer.Write(v)
return NewTProtocolException(err)
}
func (p *TBinaryProtocol) WriteDouble(value float64) error {
return p.WriteI64(int64(math.Float64bits(value)))
}
func (p *TBinaryProtocol) WriteString(value string) error {
e := p.WriteI32(int32(len(value)))
if e != nil {
return e
}
_, err := p.trans.WriteString(value)
return NewTProtocolException(err)
}
func (p *TBinaryProtocol) WriteBinary(value []byte) error {
e := p.WriteI32(int32(len(value)))
if e != nil {
return e
}
_, err := p.writer.Write(value)
return NewTProtocolException(err)
}
/**
* Reading methods
*/
func (p *TBinaryProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
size, e := p.ReadI32()
if e != nil {
return "", typeId, 0, NewTProtocolException(e)
}
if size < 0 {
typeId = TMessageType(size & 0x0ff)
version := int64(int64(size) & VERSION_MASK)
if version != VERSION_1 {
return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Bad version in ReadMessageBegin"))
}
name, e = p.ReadString()
if e != nil {
return name, typeId, seqId, NewTProtocolException(e)
}
seqId, e = p.ReadI32()
if e != nil {
return name, typeId, seqId, NewTProtocolException(e)
}
return name, typeId, seqId, nil
}
if p.strictRead {
return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Missing version in ReadMessageBegin"))
}
name, e2 := p.readStringBody(size)
if e2 != nil {
return name, typeId, seqId, e2
}
b, e3 := p.ReadByte()
if e3 != nil {
return name, typeId, seqId, e3
}
typeId = TMessageType(b)
seqId, e4 := p.ReadI32()
if e4 != nil {
return name, typeId, seqId, e4
}
return name, typeId, seqId, nil
}
func (p *TBinaryProtocol) ReadMessageEnd() error {
return nil
}
func (p *TBinaryProtocol) ReadStructBegin() (name string, err error) {
return
}
func (p *TBinaryProtocol) ReadStructEnd() error {
return nil
}
func (p *TBinaryProtocol) ReadFieldBegin() (name string, typeId TType, seqId int16, err error) {
t, err := p.ReadByte()
typeId = TType(t)
if err != nil {
return name, typeId, seqId, err
}
if t != STOP {
seqId, err = p.ReadI16()
}
return name, typeId, seqId, err
}
func (p *TBinaryProtocol) ReadFieldEnd() error {
return nil
}
var invalidDataLength = NewTProtocolExceptionWithType(INVALID_DATA, errors.New("Invalid data length"))
func (p *TBinaryProtocol) ReadMapBegin() (kType, vType TType, size int, err error) {
k, e := p.ReadByte()
if e != nil {
err = NewTProtocolException(e)
return
}
kType = TType(k)
v, e := p.ReadByte()
if e != nil {
err = NewTProtocolException(e)
return
}
vType = TType(v)
size32, e := p.ReadI32()
if e != nil {
err = NewTProtocolException(e)
return
}
if size32 < 0 {
err = invalidDataLength
return
}
size = int(size32)
return kType, vType, size, nil
}
func (p *TBinaryProtocol) ReadMapEnd() error {
return nil
}
func (p *TBinaryProtocol) ReadListBegin() (elemType TType, size int, err error) {
b, e := p.ReadByte()
if e != nil {
err = NewTProtocolException(e)
return
}
elemType = TType(b)
size32, e := p.ReadI32()
if e != nil {
err = NewTProtocolException(e)
return
}
if size32 < 0 {
err = invalidDataLength
return
}
size = int(size32)
return
}
func (p *TBinaryProtocol) ReadListEnd() error {
return nil
}
func (p *TBinaryProtocol) ReadSetBegin() (elemType TType, size int, err error) {
b, e := p.ReadByte()
if e != nil {
err = NewTProtocolException(e)
return
}
elemType = TType(b)
size32, e := p.ReadI32()
if e != nil {
err = NewTProtocolException(e)
return
}
if size32 < 0 {
err = invalidDataLength
return
}
size = int(size32)
return elemType, size, nil
}
func (p *TBinaryProtocol) ReadSetEnd() error {
return nil
}
func (p *TBinaryProtocol) ReadBool() (bool, error) {
b, e := p.ReadByte()
v := true
if b != 1 {
v = false
}
return v, e
}
func (p *TBinaryProtocol) ReadByte() (int8, error) {
v, err := p.trans.ReadByte()
return int8(v), err
}
func (p *TBinaryProtocol) ReadI16() (value int16, err error) {
buf := p.buffer[0:2]
err = p.readAll(buf)
value = int16(binary.BigEndian.Uint16(buf))
return value, err
}
func (p *TBinaryProtocol) ReadI32() (value int32, err error) {
buf := p.buffer[0:4]
err = p.readAll(buf)
value = int32(binary.BigEndian.Uint32(buf))
return value, err
}
func (p *TBinaryProtocol) ReadI64() (value int64, err error) {
buf := p.buffer[0:8]
err = p.readAll(buf)
value = int64(binary.BigEndian.Uint64(buf))
return value, err
}
func (p *TBinaryProtocol) ReadDouble() (value float64, err error) {
buf := p.buffer[0:8]
err = p.readAll(buf)
value = math.Float64frombits(binary.BigEndian.Uint64(buf))
return value, err
}
func (p *TBinaryProtocol) ReadString() (value string, err error) {
size, e := p.ReadI32()
if e != nil {
return "", e
}
if size < 0 {
err = invalidDataLength
return
}
return p.readStringBody(size)
}
func (p *TBinaryProtocol) ReadBinary() ([]byte, error) {
size, e := p.ReadI32()
if e != nil {
return nil, e
}
if size < 0 {
return nil, invalidDataLength
}
if uint64(size) > p.trans.RemainingBytes() {
return nil, invalidDataLength
}
isize := int(size)
buf := make([]byte, isize)
_, err := io.ReadFull(p.trans, buf)
return buf, NewTProtocolException(err)
}
func (p *TBinaryProtocol) Flush() (err error) {
return NewTProtocolException(p.trans.Flush())
}
func (p *TBinaryProtocol) Skip(fieldType TType) (err error) {
return SkipDefaultDepth(p, fieldType)
}
func (p *TBinaryProtocol) Transport() TTransport {
return p.origTransport
}
func (p *TBinaryProtocol) readAll(buf []byte) error {
_, err := io.ReadFull(p.reader, buf)
return NewTProtocolException(err)
}
const readLimit = 32768
func (p *TBinaryProtocol) readStringBody(size int32) (value string, err error) {
if size < 0 {
return "", nil
}
if uint64(size) > p.trans.RemainingBytes() {
return "", invalidDataLength
}
var (
buf bytes.Buffer
e error
b []byte
)
switch {
case int(size) <= len(p.buffer):
b = p.buffer[:size] // avoids allocation for small reads
case int(size) < readLimit:
b = make([]byte, size)
default:
b = make([]byte, readLimit)
}
for size > 0 {
_, e = io.ReadFull(p.trans, b)
buf.Write(b)
if e != nil {
break
}
size -= readLimit
if size < readLimit && size > 0 {
b = b[:size]
}
}
return buf.String(), NewTProtocolException(e)
}

815
vendor/github.com/uber/jaeger-client-go/thrift/compact_protocol.go generated vendored Normal file
View File

@ -0,0 +1,815 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"encoding/binary"
"fmt"
"io"
"math"
)
const (
COMPACT_PROTOCOL_ID = 0x082
COMPACT_VERSION = 1
COMPACT_VERSION_MASK = 0x1f
COMPACT_TYPE_MASK = 0x0E0
COMPACT_TYPE_BITS = 0x07
COMPACT_TYPE_SHIFT_AMOUNT = 5
)
type tCompactType byte
const (
COMPACT_BOOLEAN_TRUE = 0x01
COMPACT_BOOLEAN_FALSE = 0x02
COMPACT_BYTE = 0x03
COMPACT_I16 = 0x04
COMPACT_I32 = 0x05
COMPACT_I64 = 0x06
COMPACT_DOUBLE = 0x07
COMPACT_BINARY = 0x08
COMPACT_LIST = 0x09
COMPACT_SET = 0x0A
COMPACT_MAP = 0x0B
COMPACT_STRUCT = 0x0C
)
var (
ttypeToCompactType map[TType]tCompactType
)
func init() {
ttypeToCompactType = map[TType]tCompactType{
STOP: STOP,
BOOL: COMPACT_BOOLEAN_TRUE,
BYTE: COMPACT_BYTE,
I16: COMPACT_I16,
I32: COMPACT_I32,
I64: COMPACT_I64,
DOUBLE: COMPACT_DOUBLE,
STRING: COMPACT_BINARY,
LIST: COMPACT_LIST,
SET: COMPACT_SET,
MAP: COMPACT_MAP,
STRUCT: COMPACT_STRUCT,
}
}
type TCompactProtocolFactory struct{}
func NewTCompactProtocolFactory() *TCompactProtocolFactory {
return &TCompactProtocolFactory{}
}
func (p *TCompactProtocolFactory) GetProtocol(trans TTransport) TProtocol {
return NewTCompactProtocol(trans)
}
type TCompactProtocol struct {
trans TRichTransport
origTransport TTransport
// Used to keep track of the last field for the current and previous structs,
// so we can do the delta stuff.
lastField []int
lastFieldId int
// If we encounter a boolean field begin, save the TField here so it can
// have the value incorporated.
booleanFieldName string
booleanFieldId int16
booleanFieldPending bool
// If we read a field header, and it's a boolean field, save the boolean
// value here so that readBool can use it.
boolValue bool
boolValueIsNotNull bool
buffer [64]byte
}
// Create a TCompactProtocol given a TTransport
func NewTCompactProtocol(trans TTransport) *TCompactProtocol {
p := &TCompactProtocol{origTransport: trans, lastField: []int{}}
if et, ok := trans.(TRichTransport); ok {
p.trans = et
} else {
p.trans = NewTRichTransport(trans)
}
return p
}
//
// Public Writing methods.
//
// Write a message header to the wire. Compact Protocol messages contain the
// protocol version so we can migrate forwards in the future if need be.
func (p *TCompactProtocol) WriteMessageBegin(name string, typeId TMessageType, seqid int32) error {
err := p.writeByteDirect(COMPACT_PROTOCOL_ID)
if err != nil {
return NewTProtocolException(err)
}
err = p.writeByteDirect((COMPACT_VERSION & COMPACT_VERSION_MASK) | ((byte(typeId) << COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_MASK))
if err != nil {
return NewTProtocolException(err)
}
_, err = p.writeVarint32(seqid)
if err != nil {
return NewTProtocolException(err)
}
e := p.WriteString(name)
return e
}
func (p *TCompactProtocol) WriteMessageEnd() error { return nil }
// Write a struct begin. This doesn't actually put anything on the wire. We
// use it as an opportunity to put special placeholder markers on the field
// stack so we can get the field id deltas correct.
func (p *TCompactProtocol) WriteStructBegin(name string) error {
p.lastField = append(p.lastField, p.lastFieldId)
p.lastFieldId = 0
return nil
}
// Write a struct end. This doesn't actually put anything on the wire. We use
// this as an opportunity to pop the last field from the current struct off
// of the field stack.
func (p *TCompactProtocol) WriteStructEnd() error {
p.lastFieldId = p.lastField[len(p.lastField)-1]
p.lastField = p.lastField[:len(p.lastField)-1]
return nil
}
func (p *TCompactProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
if typeId == BOOL {
// we want to possibly include the value, so we'll wait.
p.booleanFieldName, p.booleanFieldId, p.booleanFieldPending = name, id, true
return nil
}
_, err := p.writeFieldBeginInternal(name, typeId, id, 0xFF)
return NewTProtocolException(err)
}
// The workhorse of writeFieldBegin. It has the option of doing a
// 'type override' of the type header. This is used specifically in the
// boolean field case.
func (p *TCompactProtocol) writeFieldBeginInternal(name string, typeId TType, id int16, typeOverride byte) (int, error) {
// short lastField = lastField_.pop();
// if there's a type override, use that.
var typeToWrite byte
if typeOverride == 0xFF {
typeToWrite = byte(p.getCompactType(typeId))
} else {
typeToWrite = typeOverride
}
// check if we can use delta encoding for the field id
fieldId := int(id)
written := 0
if fieldId > p.lastFieldId && fieldId-p.lastFieldId <= 15 {
// write them together
err := p.writeByteDirect(byte((fieldId-p.lastFieldId)<<4) | typeToWrite)
if err != nil {
return 0, err
}
} else {
// write them separate
err := p.writeByteDirect(typeToWrite)
if err != nil {
return 0, err
}
err = p.WriteI16(id)
written = 1 + 2
if err != nil {
return 0, err
}
}
p.lastFieldId = fieldId
// p.lastField.Push(field.id);
return written, nil
}
func (p *TCompactProtocol) WriteFieldEnd() error { return nil }
func (p *TCompactProtocol) WriteFieldStop() error {
err := p.writeByteDirect(STOP)
return NewTProtocolException(err)
}
func (p *TCompactProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
if size == 0 {
err := p.writeByteDirect(0)
return NewTProtocolException(err)
}
_, err := p.writeVarint32(int32(size))
if err != nil {
return NewTProtocolException(err)
}
err = p.writeByteDirect(byte(p.getCompactType(keyType))<<4 | byte(p.getCompactType(valueType)))
return NewTProtocolException(err)
}
func (p *TCompactProtocol) WriteMapEnd() error { return nil }
// Write a list header.
func (p *TCompactProtocol) WriteListBegin(elemType TType, size int) error {
_, err := p.writeCollectionBegin(elemType, size)
return NewTProtocolException(err)
}
func (p *TCompactProtocol) WriteListEnd() error { return nil }
// Write a set header.
func (p *TCompactProtocol) WriteSetBegin(elemType TType, size int) error {
_, err := p.writeCollectionBegin(elemType, size)
return NewTProtocolException(err)
}
func (p *TCompactProtocol) WriteSetEnd() error { return nil }
func (p *TCompactProtocol) WriteBool(value bool) error {
v := byte(COMPACT_BOOLEAN_FALSE)
if value {
v = byte(COMPACT_BOOLEAN_TRUE)
}
if p.booleanFieldPending {
// we haven't written the field header yet
_, err := p.writeFieldBeginInternal(p.booleanFieldName, BOOL, p.booleanFieldId, v)
p.booleanFieldPending = false
return NewTProtocolException(err)
}
// we're not part of a field, so just write the value.
err := p.writeByteDirect(v)
return NewTProtocolException(err)
}
// Write a byte. Nothing to see here!
func (p *TCompactProtocol) WriteByte(value int8) error {
err := p.writeByteDirect(byte(value))
return NewTProtocolException(err)
}
// Write an I16 as a zigzag varint.
func (p *TCompactProtocol) WriteI16(value int16) error {
_, err := p.writeVarint32(p.int32ToZigzag(int32(value)))
return NewTProtocolException(err)
}
// Write an i32 as a zigzag varint.
func (p *TCompactProtocol) WriteI32(value int32) error {
_, err := p.writeVarint32(p.int32ToZigzag(value))
return NewTProtocolException(err)
}
// Write an i64 as a zigzag varint.
func (p *TCompactProtocol) WriteI64(value int64) error {
_, err := p.writeVarint64(p.int64ToZigzag(value))
return NewTProtocolException(err)
}
// Write a double to the wire as 8 bytes.
func (p *TCompactProtocol) WriteDouble(value float64) error {
buf := p.buffer[0:8]
binary.LittleEndian.PutUint64(buf, math.Float64bits(value))
_, err := p.trans.Write(buf)
return NewTProtocolException(err)
}
// Write a string to the wire with a varint size preceding.
func (p *TCompactProtocol) WriteString(value string) error {
_, e := p.writeVarint32(int32(len(value)))
if e != nil {
return NewTProtocolException(e)
}
if len(value) > 0 {
}
_, e = p.trans.WriteString(value)
return e
}
// Write a byte array, using a varint for the size.
func (p *TCompactProtocol) WriteBinary(bin []byte) error {
_, e := p.writeVarint32(int32(len(bin)))
if e != nil {
return NewTProtocolException(e)
}
if len(bin) > 0 {
_, e = p.trans.Write(bin)
return NewTProtocolException(e)
}
return nil
}
//
// Reading methods.
//
// Read a message header.
func (p *TCompactProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
protocolId, err := p.readByteDirect()
if err != nil {
return
}
if protocolId != COMPACT_PROTOCOL_ID {
e := fmt.Errorf("Expected protocol id %02x but got %02x", COMPACT_PROTOCOL_ID, protocolId)
return "", typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, e)
}
versionAndType, err := p.readByteDirect()
if err != nil {
return
}
version := versionAndType & COMPACT_VERSION_MASK
typeId = TMessageType((versionAndType >> COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_BITS)
if version != COMPACT_VERSION {
e := fmt.Errorf("Expected version %02x but got %02x", COMPACT_VERSION, version)
err = NewTProtocolExceptionWithType(BAD_VERSION, e)
return
}
seqId, e := p.readVarint32()
if e != nil {
err = NewTProtocolException(e)
return
}
name, err = p.ReadString()
return
}
func (p *TCompactProtocol) ReadMessageEnd() error { return nil }
// Read a struct begin. There's nothing on the wire for this, but it is our
// opportunity to push a new struct begin marker onto the field stack.
func (p *TCompactProtocol) ReadStructBegin() (name string, err error) {
p.lastField = append(p.lastField, p.lastFieldId)
p.lastFieldId = 0
return
}
// Doesn't actually consume any wire data, just removes the last field for
// this struct from the field stack.
func (p *TCompactProtocol) ReadStructEnd() error {
// consume the last field we read off the wire.
p.lastFieldId = p.lastField[len(p.lastField)-1]
p.lastField = p.lastField[:len(p.lastField)-1]
return nil
}
// Read a field header off the wire.
func (p *TCompactProtocol) ReadFieldBegin() (name string, typeId TType, id int16, err error) {
t, err := p.readByteDirect()
if err != nil {
return
}
// if it's a stop, then we can return immediately, as the struct is over.
if (t & 0x0f) == STOP {
return "", STOP, 0, nil
}
// mask off the 4 MSB of the type header. it could contain a field id delta.
modifier := int16((t & 0xf0) >> 4)
if modifier == 0 {
// not a delta. look ahead for the zigzag varint field id.
id, err = p.ReadI16()
if err != nil {
return
}
} else {
// has a delta. add the delta to the last read field id.
id = int16(p.lastFieldId) + modifier
}
typeId, e := p.getTType(tCompactType(t & 0x0f))
if e != nil {
err = NewTProtocolException(e)
return
}
// if this happens to be a boolean field, the value is encoded in the type
if p.isBoolType(t) {
// save the boolean value in a special instance variable.
p.boolValue = (byte(t)&0x0f == COMPACT_BOOLEAN_TRUE)
p.boolValueIsNotNull = true
}
// push the new field onto the field stack so we can keep the deltas going.
p.lastFieldId = int(id)
return
}
func (p *TCompactProtocol) ReadFieldEnd() error { return nil }
// Read a map header off the wire. If the size is zero, skip reading the key
// and value type. This means that 0-length maps will yield TMaps without the
// "correct" types.
func (p *TCompactProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, err error) {
size32, e := p.readVarint32()
if e != nil {
err = NewTProtocolException(e)
return
}
if size32 < 0 {
err = invalidDataLength
return
}
size = int(size32)
keyAndValueType := byte(STOP)
if size != 0 {
keyAndValueType, err = p.readByteDirect()
if err != nil {
return
}
}
keyType, _ = p.getTType(tCompactType(keyAndValueType >> 4))
valueType, _ = p.getTType(tCompactType(keyAndValueType & 0xf))
return
}
func (p *TCompactProtocol) ReadMapEnd() error { return nil }
// Read a list header off the wire. If the list size is 0-14, the size will
// be packed into the element type header. If it's a longer list, the 4 MSB
// of the element type header will be 0xF, and a varint will follow with the
// true size.
func (p *TCompactProtocol) ReadListBegin() (elemType TType, size int, err error) {
size_and_type, err := p.readByteDirect()
if err != nil {
return
}
size = int((size_and_type >> 4) & 0x0f)
if size == 15 {
size2, e := p.readVarint32()
if e != nil {
err = NewTProtocolException(e)
return
}
if size2 < 0 {
err = invalidDataLength
return
}
size = int(size2)
}
elemType, e := p.getTType(tCompactType(size_and_type))
if e != nil {
err = NewTProtocolException(e)
return
}
return
}
func (p *TCompactProtocol) ReadListEnd() error { return nil }
// Read a set header off the wire. If the set size is 0-14, the size will
// be packed into the element type header. If it's a longer set, the 4 MSB
// of the element type header will be 0xF, and a varint will follow with the
// true size.
func (p *TCompactProtocol) ReadSetBegin() (elemType TType, size int, err error) {
return p.ReadListBegin()
}
func (p *TCompactProtocol) ReadSetEnd() error { return nil }
// Read a boolean off the wire. If this is a boolean field, the value should
// already have been read during readFieldBegin, so we'll just consume the
// pre-stored value. Otherwise, read a byte.
func (p *TCompactProtocol) ReadBool() (value bool, err error) {
if p.boolValueIsNotNull {
p.boolValueIsNotNull = false
return p.boolValue, nil
}
v, err := p.readByteDirect()
return v == COMPACT_BOOLEAN_TRUE, err
}
// Read a single byte off the wire. Nothing interesting here.
func (p *TCompactProtocol) ReadByte() (int8, error) {
v, err := p.readByteDirect()
if err != nil {
return 0, NewTProtocolException(err)
}
return int8(v), err
}
// Read an i16 from the wire as a zigzag varint.
func (p *TCompactProtocol) ReadI16() (value int16, err error) {
v, err := p.ReadI32()
return int16(v), err
}
// Read an i32 from the wire as a zigzag varint.
func (p *TCompactProtocol) ReadI32() (value int32, err error) {
v, e := p.readVarint32()
if e != nil {
return 0, NewTProtocolException(e)
}
value = p.zigzagToInt32(v)
return value, nil
}
// Read an i64 from the wire as a zigzag varint.
func (p *TCompactProtocol) ReadI64() (value int64, err error) {
v, e := p.readVarint64()
if e != nil {
return 0, NewTProtocolException(e)
}
value = p.zigzagToInt64(v)
return value, nil
}
// No magic here - just read a double off the wire.
func (p *TCompactProtocol) ReadDouble() (value float64, err error) {
longBits := p.buffer[0:8]
_, e := io.ReadFull(p.trans, longBits)
if e != nil {
return 0.0, NewTProtocolException(e)
}
return math.Float64frombits(p.bytesToUint64(longBits)), nil
}
// Reads a []byte (via readBinary), and then UTF-8 decodes it.
func (p *TCompactProtocol) ReadString() (value string, err error) {
length, e := p.readVarint32()
if e != nil {
return "", NewTProtocolException(e)
}
if length < 0 {
return "", invalidDataLength
}
if uint64(length) > p.trans.RemainingBytes() {
return "", invalidDataLength
}
if length == 0 {
return "", nil
}
var buf []byte
if length <= int32(len(p.buffer)) {
buf = p.buffer[0:length]
} else {
buf = make([]byte, length)
}
_, e = io.ReadFull(p.trans, buf)
return string(buf), NewTProtocolException(e)
}
// Read a []byte from the wire.
func (p *TCompactProtocol) ReadBinary() (value []byte, err error) {
length, e := p.readVarint32()
if e != nil {
return nil, NewTProtocolException(e)
}
if length == 0 {
return []byte{}, nil
}
if length < 0 {
return nil, invalidDataLength
}
if uint64(length) > p.trans.RemainingBytes() {
return nil, invalidDataLength
}
buf := make([]byte, length)
_, e = io.ReadFull(p.trans, buf)
return buf, NewTProtocolException(e)
}
func (p *TCompactProtocol) Flush() (err error) {
return NewTProtocolException(p.trans.Flush())
}
func (p *TCompactProtocol) Skip(fieldType TType) (err error) {
return SkipDefaultDepth(p, fieldType)
}
func (p *TCompactProtocol) Transport() TTransport {
return p.origTransport
}
//
// Internal writing methods
//
// Abstract method for writing the start of lists and sets. List and sets on
// the wire differ only by the type indicator.
func (p *TCompactProtocol) writeCollectionBegin(elemType TType, size int) (int, error) {
if size <= 14 {
return 1, p.writeByteDirect(byte(int32(size<<4) | int32(p.getCompactType(elemType))))
}
err := p.writeByteDirect(0xf0 | byte(p.getCompactType(elemType)))
if err != nil {
return 0, err
}
m, err := p.writeVarint32(int32(size))
return 1 + m, err
}
// Write an i32 as a varint. Results in 1-5 bytes on the wire.
// TODO(pomack): make a permanent buffer like writeVarint64?
func (p *TCompactProtocol) writeVarint32(n int32) (int, error) {
i32buf := p.buffer[0:5]
idx := 0
for {
if (n & ^0x7F) == 0 {
i32buf[idx] = byte(n)
idx++
// p.writeByteDirect(byte(n));
break
// return;
} else {
i32buf[idx] = byte((n & 0x7F) | 0x80)
idx++
// p.writeByteDirect(byte(((n & 0x7F) | 0x80)));
u := uint32(n)
n = int32(u >> 7)
}
}
return p.trans.Write(i32buf[0:idx])
}
// Write an i64 as a varint. Results in 1-10 bytes on the wire.
func (p *TCompactProtocol) writeVarint64(n int64) (int, error) {
varint64out := p.buffer[0:10]
idx := 0
for {
if (n & ^0x7F) == 0 {
varint64out[idx] = byte(n)
idx++
break
} else {
varint64out[idx] = byte((n & 0x7F) | 0x80)
idx++
u := uint64(n)
n = int64(u >> 7)
}
}
return p.trans.Write(varint64out[0:idx])
}
// Convert l into a zigzag long. This allows negative numbers to be
// represented compactly as a varint.
func (p *TCompactProtocol) int64ToZigzag(l int64) int64 {
return (l << 1) ^ (l >> 63)
}
// Convert l into a zigzag long. This allows negative numbers to be
// represented compactly as a varint.
func (p *TCompactProtocol) int32ToZigzag(n int32) int32 {
return (n << 1) ^ (n >> 31)
}
func (p *TCompactProtocol) fixedUint64ToBytes(n uint64, buf []byte) {
binary.LittleEndian.PutUint64(buf, n)
}
func (p *TCompactProtocol) fixedInt64ToBytes(n int64, buf []byte) {
binary.LittleEndian.PutUint64(buf, uint64(n))
}
// Writes a byte without any possibility of all that field header nonsense.
// Used internally by other writing methods that know they need to write a byte.
func (p *TCompactProtocol) writeByteDirect(b byte) error {
return p.trans.WriteByte(b)
}
// Writes a byte without any possibility of all that field header nonsense.
func (p *TCompactProtocol) writeIntAsByteDirect(n int) (int, error) {
return 1, p.writeByteDirect(byte(n))
}
//
// Internal reading methods
//
// Read an i32 from the wire as a varint. The MSB of each byte is set
// if there is another byte to follow. This can read up to 5 bytes.
func (p *TCompactProtocol) readVarint32() (int32, error) {
// if the wire contains the right stuff, this will just truncate the i64 we
// read and get us the right sign.
v, err := p.readVarint64()
return int32(v), err
}
// Read an i64 from the wire as a proper varint. The MSB of each byte is set
// if there is another byte to follow. This can read up to 10 bytes.
func (p *TCompactProtocol) readVarint64() (int64, error) {
shift := uint(0)
result := int64(0)
for {
b, err := p.readByteDirect()
if err != nil {
return 0, err
}
result |= int64(b&0x7f) << shift
if (b & 0x80) != 0x80 {
break
}
shift += 7
}
return result, nil
}
// Read a byte, unlike ReadByte that reads Thrift-byte that is i8.
func (p *TCompactProtocol) readByteDirect() (byte, error) {
return p.trans.ReadByte()
}
//
// encoding helpers
//
// Convert from zigzag int to int.
func (p *TCompactProtocol) zigzagToInt32(n int32) int32 {
u := uint32(n)
return int32(u>>1) ^ -(n & 1)
}
// Convert from zigzag long to long.
func (p *TCompactProtocol) zigzagToInt64(n int64) int64 {
u := uint64(n)
return int64(u>>1) ^ -(n & 1)
}
// Note that it's important that the mask bytes are long literals,
// otherwise they'll default to ints, and when you shift an int left 56 bits,
// you just get a messed up int.
func (p *TCompactProtocol) bytesToInt64(b []byte) int64 {
return int64(binary.LittleEndian.Uint64(b))
}
// Note that it's important that the mask bytes are long literals,
// otherwise they'll default to ints, and when you shift an int left 56 bits,
// you just get a messed up int.
func (p *TCompactProtocol) bytesToUint64(b []byte) uint64 {
return binary.LittleEndian.Uint64(b)
}
//
// type testing and converting
//
func (p *TCompactProtocol) isBoolType(b byte) bool {
return (b&0x0f) == COMPACT_BOOLEAN_TRUE || (b&0x0f) == COMPACT_BOOLEAN_FALSE
}
// Given a tCompactType constant, convert it to its corresponding
// TType value.
func (p *TCompactProtocol) getTType(t tCompactType) (TType, error) {
switch byte(t) & 0x0f {
case STOP:
return STOP, nil
case COMPACT_BOOLEAN_FALSE, COMPACT_BOOLEAN_TRUE:
return BOOL, nil
case COMPACT_BYTE:
return BYTE, nil
case COMPACT_I16:
return I16, nil
case COMPACT_I32:
return I32, nil
case COMPACT_I64:
return I64, nil
case COMPACT_DOUBLE:
return DOUBLE, nil
case COMPACT_BINARY:
return STRING, nil
case COMPACT_LIST:
return LIST, nil
case COMPACT_SET:
return SET, nil
case COMPACT_MAP:
return MAP, nil
case COMPACT_STRUCT:
return STRUCT, nil
}
return STOP, TException(fmt.Errorf("don't know what type: %d", t&0x0f))
}
// Given a TType value, find the appropriate TCompactProtocol.Types constant.
func (p *TCompactProtocol) getCompactType(t TType) tCompactType {
return ttypeToCompactType[t]
}

44
vendor/github.com/uber/jaeger-client-go/thrift/exception.go generated vendored Normal file
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@ -0,0 +1,44 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"errors"
)
// Generic Thrift exception
type TException interface {
error
}
// Prepends additional information to an error without losing the Thrift exception interface
func PrependError(prepend string, err error) error {
if t, ok := err.(TTransportException); ok {
return NewTTransportException(t.TypeId(), prepend+t.Error())
}
if t, ok := err.(TProtocolException); ok {
return NewTProtocolExceptionWithType(t.TypeId(), errors.New(prepend+err.Error()))
}
if t, ok := err.(TApplicationException); ok {
return NewTApplicationException(t.TypeId(), prepend+t.Error())
}
return errors.New(prepend + err.Error())
}

79
vendor/github.com/uber/jaeger-client-go/thrift/memory_buffer.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"bytes"
)
// Memory buffer-based implementation of the TTransport interface.
type TMemoryBuffer struct {
*bytes.Buffer
size int
}
type TMemoryBufferTransportFactory struct {
size int
}
func (p *TMemoryBufferTransportFactory) GetTransport(trans TTransport) TTransport {
if trans != nil {
t, ok := trans.(*TMemoryBuffer)
if ok && t.size > 0 {
return NewTMemoryBufferLen(t.size)
}
}
return NewTMemoryBufferLen(p.size)
}
func NewTMemoryBufferTransportFactory(size int) *TMemoryBufferTransportFactory {
return &TMemoryBufferTransportFactory{size: size}
}
func NewTMemoryBuffer() *TMemoryBuffer {
return &TMemoryBuffer{Buffer: &bytes.Buffer{}, size: 0}
}
func NewTMemoryBufferLen(size int) *TMemoryBuffer {
buf := make([]byte, 0, size)
return &TMemoryBuffer{Buffer: bytes.NewBuffer(buf), size: size}
}
func (p *TMemoryBuffer) IsOpen() bool {
return true
}
func (p *TMemoryBuffer) Open() error {
return nil
}
func (p *TMemoryBuffer) Close() error {
p.Buffer.Reset()
return nil
}
// Flushing a memory buffer is a no-op
func (p *TMemoryBuffer) Flush() error {
return nil
}
func (p *TMemoryBuffer) RemainingBytes() (num_bytes uint64) {
return uint64(p.Buffer.Len())
}

31
vendor/github.com/uber/jaeger-client-go/thrift/messagetype.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
// Message type constants in the Thrift protocol.
type TMessageType int32
const (
INVALID_TMESSAGE_TYPE TMessageType = 0
CALL TMessageType = 1
REPLY TMessageType = 2
EXCEPTION TMessageType = 3
ONEWAY TMessageType = 4
)

164
vendor/github.com/uber/jaeger-client-go/thrift/numeric.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"math"
"strconv"
)
type Numeric interface {
Int64() int64
Int32() int32
Int16() int16
Byte() byte
Int() int
Float64() float64
Float32() float32
String() string
isNull() bool
}
type numeric struct {
iValue int64
dValue float64
sValue string
isNil bool
}
var (
INFINITY Numeric
NEGATIVE_INFINITY Numeric
NAN Numeric
ZERO Numeric
NUMERIC_NULL Numeric
)
func NewNumericFromDouble(dValue float64) Numeric {
if math.IsInf(dValue, 1) {
return INFINITY
}
if math.IsInf(dValue, -1) {
return NEGATIVE_INFINITY
}
if math.IsNaN(dValue) {
return NAN
}
iValue := int64(dValue)
sValue := strconv.FormatFloat(dValue, 'g', 10, 64)
isNil := false
return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
}
func NewNumericFromI64(iValue int64) Numeric {
dValue := float64(iValue)
sValue := string(iValue)
isNil := false
return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
}
func NewNumericFromI32(iValue int32) Numeric {
dValue := float64(iValue)
sValue := string(iValue)
isNil := false
return &numeric{iValue: int64(iValue), dValue: dValue, sValue: sValue, isNil: isNil}
}
func NewNumericFromString(sValue string) Numeric {
if sValue == INFINITY.String() {
return INFINITY
}
if sValue == NEGATIVE_INFINITY.String() {
return NEGATIVE_INFINITY
}
if sValue == NAN.String() {
return NAN
}
iValue, _ := strconv.ParseInt(sValue, 10, 64)
dValue, _ := strconv.ParseFloat(sValue, 64)
isNil := len(sValue) == 0
return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
}
func NewNumericFromJSONString(sValue string, isNull bool) Numeric {
if isNull {
return NewNullNumeric()
}
if sValue == JSON_INFINITY {
return INFINITY
}
if sValue == JSON_NEGATIVE_INFINITY {
return NEGATIVE_INFINITY
}
if sValue == JSON_NAN {
return NAN
}
iValue, _ := strconv.ParseInt(sValue, 10, 64)
dValue, _ := strconv.ParseFloat(sValue, 64)
return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNull}
}
func NewNullNumeric() Numeric {
return &numeric{iValue: 0, dValue: 0.0, sValue: "", isNil: true}
}
func (p *numeric) Int64() int64 {
return p.iValue
}
func (p *numeric) Int32() int32 {
return int32(p.iValue)
}
func (p *numeric) Int16() int16 {
return int16(p.iValue)
}
func (p *numeric) Byte() byte {
return byte(p.iValue)
}
func (p *numeric) Int() int {
return int(p.iValue)
}
func (p *numeric) Float64() float64 {
return p.dValue
}
func (p *numeric) Float32() float32 {
return float32(p.dValue)
}
func (p *numeric) String() string {
return p.sValue
}
func (p *numeric) isNull() bool {
return p.isNil
}
func init() {
INFINITY = &numeric{iValue: 0, dValue: math.Inf(1), sValue: "Infinity", isNil: false}
NEGATIVE_INFINITY = &numeric{iValue: 0, dValue: math.Inf(-1), sValue: "-Infinity", isNil: false}
NAN = &numeric{iValue: 0, dValue: math.NaN(), sValue: "NaN", isNil: false}
ZERO = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: false}
NUMERIC_NULL = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: true}
}

30
vendor/github.com/uber/jaeger-client-go/thrift/processor.go generated vendored Normal file
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@ -0,0 +1,30 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
// A processor is a generic object which operates upon an input stream and
// writes to some output stream.
type TProcessor interface {
Process(in, out TProtocol) (bool, TException)
}
type TProcessorFunction interface {
Process(seqId int32, in, out TProtocol) (bool, TException)
}

175
vendor/github.com/uber/jaeger-client-go/thrift/protocol.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"errors"
)
const (
VERSION_MASK = 0xffff0000
VERSION_1 = 0x80010000
)
type TProtocol interface {
WriteMessageBegin(name string, typeId TMessageType, seqid int32) error
WriteMessageEnd() error
WriteStructBegin(name string) error
WriteStructEnd() error
WriteFieldBegin(name string, typeId TType, id int16) error
WriteFieldEnd() error
WriteFieldStop() error
WriteMapBegin(keyType TType, valueType TType, size int) error
WriteMapEnd() error
WriteListBegin(elemType TType, size int) error
WriteListEnd() error
WriteSetBegin(elemType TType, size int) error
WriteSetEnd() error
WriteBool(value bool) error
WriteByte(value int8) error
WriteI16(value int16) error
WriteI32(value int32) error
WriteI64(value int64) error
WriteDouble(value float64) error
WriteString(value string) error
WriteBinary(value []byte) error
ReadMessageBegin() (name string, typeId TMessageType, seqid int32, err error)
ReadMessageEnd() error
ReadStructBegin() (name string, err error)
ReadStructEnd() error
ReadFieldBegin() (name string, typeId TType, id int16, err error)
ReadFieldEnd() error
ReadMapBegin() (keyType TType, valueType TType, size int, err error)
ReadMapEnd() error
ReadListBegin() (elemType TType, size int, err error)
ReadListEnd() error
ReadSetBegin() (elemType TType, size int, err error)
ReadSetEnd() error
ReadBool() (value bool, err error)
ReadByte() (value int8, err error)
ReadI16() (value int16, err error)
ReadI32() (value int32, err error)
ReadI64() (value int64, err error)
ReadDouble() (value float64, err error)
ReadString() (value string, err error)
ReadBinary() (value []byte, err error)
Skip(fieldType TType) (err error)
Flush() (err error)
Transport() TTransport
}
// The maximum recursive depth the skip() function will traverse
const DEFAULT_RECURSION_DEPTH = 64
// Skips over the next data element from the provided input TProtocol object.
func SkipDefaultDepth(prot TProtocol, typeId TType) (err error) {
return Skip(prot, typeId, DEFAULT_RECURSION_DEPTH)
}
// Skips over the next data element from the provided input TProtocol object.
func Skip(self TProtocol, fieldType TType, maxDepth int) (err error) {
if maxDepth <= 0 {
return NewTProtocolExceptionWithType( DEPTH_LIMIT, errors.New("Depth limit exceeded"))
}
switch fieldType {
case STOP:
return
case BOOL:
_, err = self.ReadBool()
return
case BYTE:
_, err = self.ReadByte()
return
case I16:
_, err = self.ReadI16()
return
case I32:
_, err = self.ReadI32()
return
case I64:
_, err = self.ReadI64()
return
case DOUBLE:
_, err = self.ReadDouble()
return
case STRING:
_, err = self.ReadString()
return
case STRUCT:
if _, err = self.ReadStructBegin(); err != nil {
return err
}
for {
_, typeId, _, _ := self.ReadFieldBegin()
if typeId == STOP {
break
}
err := Skip(self, typeId, maxDepth-1)
if err != nil {
return err
}
self.ReadFieldEnd()
}
return self.ReadStructEnd()
case MAP:
keyType, valueType, size, err := self.ReadMapBegin()
if err != nil {
return err
}
for i := 0; i < size; i++ {
err := Skip(self, keyType, maxDepth-1)
if err != nil {
return err
}
self.Skip(valueType)
}
return self.ReadMapEnd()
case SET:
elemType, size, err := self.ReadSetBegin()
if err != nil {
return err
}
for i := 0; i < size; i++ {
err := Skip(self, elemType, maxDepth-1)
if err != nil {
return err
}
}
return self.ReadSetEnd()
case LIST:
elemType, size, err := self.ReadListBegin()
if err != nil {
return err
}
for i := 0; i < size; i++ {
err := Skip(self, elemType, maxDepth-1)
if err != nil {
return err
}
}
return self.ReadListEnd()
}
return nil
}

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vendor/github.com/uber/jaeger-client-go/thrift/protocol_exception.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"encoding/base64"
)
// Thrift Protocol exception
type TProtocolException interface {
TException
TypeId() int
}
const (
UNKNOWN_PROTOCOL_EXCEPTION = 0
INVALID_DATA = 1
NEGATIVE_SIZE = 2
SIZE_LIMIT = 3
BAD_VERSION = 4
NOT_IMPLEMENTED = 5
DEPTH_LIMIT = 6
)
type tProtocolException struct {
typeId int
message string
}
func (p *tProtocolException) TypeId() int {
return p.typeId
}
func (p *tProtocolException) String() string {
return p.message
}
func (p *tProtocolException) Error() string {
return p.message
}
func NewTProtocolException(err error) TProtocolException {
if err == nil {
return nil
}
if e,ok := err.(TProtocolException); ok {
return e
}
if _, ok := err.(base64.CorruptInputError); ok {
return &tProtocolException{INVALID_DATA, err.Error()}
}
return &tProtocolException{UNKNOWN_PROTOCOL_EXCEPTION, err.Error()}
}
func NewTProtocolExceptionWithType(errType int, err error) TProtocolException {
if err == nil {
return nil
}
return &tProtocolException{errType, err.Error()}
}

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vendor/github.com/uber/jaeger-client-go/thrift/protocol_factory.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
// Factory interface for constructing protocol instances.
type TProtocolFactory interface {
GetProtocol(trans TTransport) TProtocol
}

69
vendor/github.com/uber/jaeger-client-go/thrift/rich_transport.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import "io"
type RichTransport struct {
TTransport
}
// Wraps Transport to provide TRichTransport interface
func NewTRichTransport(trans TTransport) *RichTransport {
return &RichTransport{trans}
}
func (r *RichTransport) ReadByte() (c byte, err error) {
return readByte(r.TTransport)
}
func (r *RichTransport) WriteByte(c byte) error {
return writeByte(r.TTransport, c)
}
func (r *RichTransport) WriteString(s string) (n int, err error) {
return r.Write([]byte(s))
}
func (r *RichTransport) RemainingBytes() (num_bytes uint64) {
return r.TTransport.RemainingBytes()
}
func readByte(r io.Reader) (c byte, err error) {
v := [1]byte{0}
n, err := r.Read(v[0:1])
if n > 0 && (err == nil || err == io.EOF) {
return v[0], nil
}
if n > 0 && err != nil {
return v[0], err
}
if err != nil {
return 0, err
}
return v[0], nil
}
func writeByte(w io.Writer, c byte) error {
v := [1]byte{c}
_, err := w.Write(v[0:1])
return err
}

75
vendor/github.com/uber/jaeger-client-go/thrift/serializer.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
type TSerializer struct {
Transport *TMemoryBuffer
Protocol TProtocol
}
type TStruct interface {
Write(p TProtocol) error
Read(p TProtocol) error
}
func NewTSerializer() *TSerializer {
transport := NewTMemoryBufferLen(1024)
protocol := NewTBinaryProtocolFactoryDefault().GetProtocol(transport)
return &TSerializer{
transport,
protocol}
}
func (t *TSerializer) WriteString(msg TStruct) (s string, err error) {
t.Transport.Reset()
if err = msg.Write(t.Protocol); err != nil {
return
}
if err = t.Protocol.Flush(); err != nil {
return
}
if err = t.Transport.Flush(); err != nil {
return
}
return t.Transport.String(), nil
}
func (t *TSerializer) Write(msg TStruct) (b []byte, err error) {
t.Transport.Reset()
if err = msg.Write(t.Protocol); err != nil {
return
}
if err = t.Protocol.Flush(); err != nil {
return
}
if err = t.Transport.Flush(); err != nil {
return
}
b = append(b, t.Transport.Bytes()...)
return
}

1337
vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go generated vendored Normal file
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68
vendor/github.com/uber/jaeger-client-go/thrift/transport.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"errors"
"io"
)
var errTransportInterrupted = errors.New("Transport Interrupted")
type Flusher interface {
Flush() (err error)
}
type ReadSizeProvider interface {
RemainingBytes() (num_bytes uint64)
}
// Encapsulates the I/O layer
type TTransport interface {
io.ReadWriteCloser
Flusher
ReadSizeProvider
// Opens the transport for communication
Open() error
// Returns true if the transport is open
IsOpen() bool
}
type stringWriter interface {
WriteString(s string) (n int, err error)
}
// This is "enchanced" transport with extra capabilities. You need to use one of these
// to construct protocol.
// Notably, TSocket does not implement this interface, and it is always a mistake to use
// TSocket directly in protocol.
type TRichTransport interface {
io.ReadWriter
io.ByteReader
io.ByteWriter
stringWriter
Flusher
ReadSizeProvider
}

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vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"errors"
"io"
)
type timeoutable interface {
Timeout() bool
}
// Thrift Transport exception
type TTransportException interface {
TException
TypeId() int
Err() error
}
const (
UNKNOWN_TRANSPORT_EXCEPTION = 0
NOT_OPEN = 1
ALREADY_OPEN = 2
TIMED_OUT = 3
END_OF_FILE = 4
)
type tTransportException struct {
typeId int
err error
}
func (p *tTransportException) TypeId() int {
return p.typeId
}
func (p *tTransportException) Error() string {
return p.err.Error()
}
func (p *tTransportException) Err() error {
return p.err
}
func NewTTransportException(t int, e string) TTransportException {
return &tTransportException{typeId: t, err: errors.New(e)}
}
func NewTTransportExceptionFromError(e error) TTransportException {
if e == nil {
return nil
}
if t, ok := e.(TTransportException); ok {
return t
}
switch v := e.(type) {
case TTransportException:
return v
case timeoutable:
if v.Timeout() {
return &tTransportException{typeId: TIMED_OUT, err: e}
}
}
if e == io.EOF {
return &tTransportException{typeId: END_OF_FILE, err: e}
}
return &tTransportException{typeId: UNKNOWN_TRANSPORT_EXCEPTION, err: e}
}

39
vendor/github.com/uber/jaeger-client-go/thrift/transport_factory.go generated vendored Normal file
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@ -0,0 +1,39 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
// Factory class used to create wrapped instance of Transports.
// This is used primarily in servers, which get Transports from
// a ServerTransport and then may want to mutate them (i.e. create
// a BufferedTransport from the underlying base transport)
type TTransportFactory interface {
GetTransport(trans TTransport) TTransport
}
type tTransportFactory struct{}
// Return a wrapped instance of the base Transport.
func (p *tTransportFactory) GetTransport(trans TTransport) TTransport {
return trans
}
func NewTTransportFactory() TTransportFactory {
return &tTransportFactory{}
}

69
vendor/github.com/uber/jaeger-client-go/thrift/type.go generated vendored Normal file
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@ -0,0 +1,69 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
// Type constants in the Thrift protocol
type TType byte
const (
STOP = 0
VOID = 1
BOOL = 2
BYTE = 3
I08 = 3
DOUBLE = 4
I16 = 6
I32 = 8
I64 = 10
STRING = 11
UTF7 = 11
STRUCT = 12
MAP = 13
SET = 14
LIST = 15
UTF8 = 16
UTF16 = 17
//BINARY = 18 wrong and unusued
)
var typeNames = map[int]string{
STOP: "STOP",
VOID: "VOID",
BOOL: "BOOL",
BYTE: "BYTE",
DOUBLE: "DOUBLE",
I16: "I16",
I32: "I32",
I64: "I64",
STRING: "STRING",
STRUCT: "STRUCT",
MAP: "MAP",
SET: "SET",
LIST: "LIST",
UTF8: "UTF8",
UTF16: "UTF16",
}
func (p TType) String() string {
if s, ok := typeNames[int(p)]; ok {
return s
}
return "Unknown"
}

431
vendor/github.com/uber/jaeger-client-go/tracer.go generated vendored Normal file
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// Copyright (c) 2017-2018 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"fmt"
"io"
"os"
"reflect"
"strconv"
"sync"
"time"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/uber/jaeger-client-go/internal/baggage"
"github.com/uber/jaeger-client-go/internal/throttler"
"github.com/uber/jaeger-client-go/log"
"github.com/uber/jaeger-client-go/utils"
)
// Tracer implements opentracing.Tracer.
type Tracer struct {
serviceName string
hostIPv4 uint32 // this is for zipkin endpoint conversion
sampler Sampler
reporter Reporter
metrics Metrics
logger log.Logger
timeNow func() time.Time
randomNumber func() uint64
options struct {
poolSpans bool
gen128Bit bool // whether to generate 128bit trace IDs
zipkinSharedRPCSpan bool
highTraceIDGenerator func() uint64 // custom high trace ID generator
maxTagValueLength int
// more options to come
}
// pool for Span objects
spanPool sync.Pool
injectors map[interface{}]Injector
extractors map[interface{}]Extractor
observer compositeObserver
tags []Tag
process Process
baggageRestrictionManager baggage.RestrictionManager
baggageSetter *baggageSetter
debugThrottler throttler.Throttler
}
// NewTracer creates Tracer implementation that reports tracing to Jaeger.
// The returned io.Closer can be used in shutdown hooks to ensure that the internal
// queue of the Reporter is drained and all buffered spans are submitted to collectors.
func NewTracer(
serviceName string,
sampler Sampler,
reporter Reporter,
options ...TracerOption,
) (opentracing.Tracer, io.Closer) {
t := &Tracer{
serviceName: serviceName,
sampler: sampler,
reporter: reporter,
injectors: make(map[interface{}]Injector),
extractors: make(map[interface{}]Extractor),
metrics: *NewNullMetrics(),
spanPool: sync.Pool{New: func() interface{} {
return &Span{}
}},
}
for _, option := range options {
option(t)
}
// register default injectors/extractors unless they are already provided via options
textPropagator := newTextMapPropagator(getDefaultHeadersConfig(), t.metrics)
t.addCodec(opentracing.TextMap, textPropagator, textPropagator)
httpHeaderPropagator := newHTTPHeaderPropagator(getDefaultHeadersConfig(), t.metrics)
t.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
binaryPropagator := newBinaryPropagator(t)
t.addCodec(opentracing.Binary, binaryPropagator, binaryPropagator)
// TODO remove after TChannel supports OpenTracing
interopPropagator := &jaegerTraceContextPropagator{tracer: t}
t.addCodec(SpanContextFormat, interopPropagator, interopPropagator)
zipkinPropagator := &zipkinPropagator{tracer: t}
t.addCodec(ZipkinSpanFormat, zipkinPropagator, zipkinPropagator)
if t.baggageRestrictionManager != nil {
t.baggageSetter = newBaggageSetter(t.baggageRestrictionManager, &t.metrics)
} else {
t.baggageSetter = newBaggageSetter(baggage.NewDefaultRestrictionManager(0), &t.metrics)
}
if t.debugThrottler == nil {
t.debugThrottler = throttler.DefaultThrottler{}
}
if t.randomNumber == nil {
rng := utils.NewRand(time.Now().UnixNano())
t.randomNumber = func() uint64 {
return uint64(rng.Int63())
}
}
if t.timeNow == nil {
t.timeNow = time.Now
}
if t.logger == nil {
t.logger = log.NullLogger
}
// Set tracer-level tags
t.tags = append(t.tags, Tag{key: JaegerClientVersionTagKey, value: JaegerClientVersion})
if hostname, err := os.Hostname(); err == nil {
t.tags = append(t.tags, Tag{key: TracerHostnameTagKey, value: hostname})
}
if ip, err := utils.HostIP(); err == nil {
t.tags = append(t.tags, Tag{key: TracerIPTagKey, value: ip.String()})
t.hostIPv4 = utils.PackIPAsUint32(ip)
} else {
t.logger.Error("Unable to determine this host's IP address: " + err.Error())
}
if t.options.gen128Bit {
if t.options.highTraceIDGenerator == nil {
t.options.highTraceIDGenerator = t.randomNumber
}
} else if t.options.highTraceIDGenerator != nil {
t.logger.Error("Overriding high trace ID generator but not generating " +
"128 bit trace IDs, consider enabling the \"Gen128Bit\" option")
}
if t.options.maxTagValueLength == 0 {
t.options.maxTagValueLength = DefaultMaxTagValueLength
}
t.process = Process{
Service: serviceName,
UUID: strconv.FormatUint(t.randomNumber(), 16),
Tags: t.tags,
}
if throttler, ok := t.debugThrottler.(ProcessSetter); ok {
throttler.SetProcess(t.process)
}
return t, t
}
// addCodec adds registers injector and extractor for given propagation format if not already defined.
func (t *Tracer) addCodec(format interface{}, injector Injector, extractor Extractor) {
if _, ok := t.injectors[format]; !ok {
t.injectors[format] = injector
}
if _, ok := t.extractors[format]; !ok {
t.extractors[format] = extractor
}
}
// StartSpan implements StartSpan() method of opentracing.Tracer.
func (t *Tracer) StartSpan(
operationName string,
options ...opentracing.StartSpanOption,
) opentracing.Span {
sso := opentracing.StartSpanOptions{}
for _, o := range options {
o.Apply(&sso)
}
return t.startSpanWithOptions(operationName, sso)
}
func (t *Tracer) startSpanWithOptions(
operationName string,
options opentracing.StartSpanOptions,
) opentracing.Span {
if options.StartTime.IsZero() {
options.StartTime = t.timeNow()
}
// Predicate whether the given span context is a valid reference
// which may be used as parent / debug ID / baggage items source
isValidReference := func(ctx SpanContext) bool {
return ctx.IsValid() || ctx.isDebugIDContainerOnly() || len(ctx.baggage) != 0
}
var references []Reference
var parent SpanContext
var hasParent bool // need this because `parent` is a value, not reference
for _, ref := range options.References {
ctx, ok := ref.ReferencedContext.(SpanContext)
if !ok {
t.logger.Error(fmt.Sprintf(
"Reference contains invalid type of SpanReference: %s",
reflect.ValueOf(ref.ReferencedContext)))
continue
}
if !isValidReference(ctx) {
continue
}
references = append(references, Reference{Type: ref.Type, Context: ctx})
if !hasParent {
parent = ctx
hasParent = ref.Type == opentracing.ChildOfRef
}
}
if !hasParent && isValidReference(parent) {
// If ChildOfRef wasn't found but a FollowFromRef exists, use the context from
// the FollowFromRef as the parent
hasParent = true
}
rpcServer := false
if v, ok := options.Tags[ext.SpanKindRPCServer.Key]; ok {
rpcServer = (v == ext.SpanKindRPCServerEnum || v == string(ext.SpanKindRPCServerEnum))
}
var samplerTags []Tag
var ctx SpanContext
newTrace := false
if !hasParent || !parent.IsValid() {
newTrace = true
ctx.traceID.Low = t.randomID()
if t.options.gen128Bit {
ctx.traceID.High = t.options.highTraceIDGenerator()
}
ctx.spanID = SpanID(ctx.traceID.Low)
ctx.parentID = 0
ctx.flags = byte(0)
if hasParent && parent.isDebugIDContainerOnly() && t.isDebugAllowed(operationName) {
ctx.flags |= (flagSampled | flagDebug)
samplerTags = []Tag{{key: JaegerDebugHeader, value: parent.debugID}}
} else if sampled, tags := t.sampler.IsSampled(ctx.traceID, operationName); sampled {
ctx.flags |= flagSampled
samplerTags = tags
}
} else {
ctx.traceID = parent.traceID
if rpcServer && t.options.zipkinSharedRPCSpan {
// Support Zipkin's one-span-per-RPC model
ctx.spanID = parent.spanID
ctx.parentID = parent.parentID
} else {
ctx.spanID = SpanID(t.randomID())
ctx.parentID = parent.spanID
}
ctx.flags = parent.flags
}
if hasParent {
// copy baggage items
if l := len(parent.baggage); l > 0 {
ctx.baggage = make(map[string]string, len(parent.baggage))
for k, v := range parent.baggage {
ctx.baggage[k] = v
}
}
}
sp := t.newSpan()
sp.context = ctx
sp.observer = t.observer.OnStartSpan(sp, operationName, options)
return t.startSpanInternal(
sp,
operationName,
options.StartTime,
samplerTags,
options.Tags,
newTrace,
rpcServer,
references,
)
}
// Inject implements Inject() method of opentracing.Tracer
func (t *Tracer) Inject(ctx opentracing.SpanContext, format interface{}, carrier interface{}) error {
c, ok := ctx.(SpanContext)
if !ok {
return opentracing.ErrInvalidSpanContext
}
if injector, ok := t.injectors[format]; ok {
return injector.Inject(c, carrier)
}
return opentracing.ErrUnsupportedFormat
}
// Extract implements Extract() method of opentracing.Tracer
func (t *Tracer) Extract(
format interface{},
carrier interface{},
) (opentracing.SpanContext, error) {
if extractor, ok := t.extractors[format]; ok {
return extractor.Extract(carrier)
}
return nil, opentracing.ErrUnsupportedFormat
}
// Close releases all resources used by the Tracer and flushes any remaining buffered spans.
func (t *Tracer) Close() error {
t.reporter.Close()
t.sampler.Close()
if mgr, ok := t.baggageRestrictionManager.(io.Closer); ok {
mgr.Close()
}
if throttler, ok := t.debugThrottler.(io.Closer); ok {
throttler.Close()
}
return nil
}
// Tags returns a slice of tracer-level tags.
func (t *Tracer) Tags() []opentracing.Tag {
tags := make([]opentracing.Tag, len(t.tags))
for i, tag := range t.tags {
tags[i] = opentracing.Tag{Key: tag.key, Value: tag.value}
}
return tags
}
// newSpan returns an instance of a clean Span object.
// If options.PoolSpans is true, the spans are retrieved from an object pool.
func (t *Tracer) newSpan() *Span {
if !t.options.poolSpans {
return &Span{}
}
sp := t.spanPool.Get().(*Span)
sp.context = emptyContext
sp.tracer = nil
sp.tags = nil
sp.logs = nil
return sp
}
func (t *Tracer) startSpanInternal(
sp *Span,
operationName string,
startTime time.Time,
internalTags []Tag,
tags opentracing.Tags,
newTrace bool,
rpcServer bool,
references []Reference,
) *Span {
sp.tracer = t
sp.operationName = operationName
sp.startTime = startTime
sp.duration = 0
sp.references = references
sp.firstInProcess = rpcServer || sp.context.parentID == 0
if len(tags) > 0 || len(internalTags) > 0 {
sp.tags = make([]Tag, len(internalTags), len(tags)+len(internalTags))
copy(sp.tags, internalTags)
for k, v := range tags {
sp.observer.OnSetTag(k, v)
if k == string(ext.SamplingPriority) && !setSamplingPriority(sp, v) {
continue
}
sp.setTagNoLocking(k, v)
}
}
// emit metrics
if sp.context.IsSampled() {
t.metrics.SpansStartedSampled.Inc(1)
if newTrace {
// We cannot simply check for parentID==0 because in Zipkin model the
// server-side RPC span has the exact same trace/span/parent IDs as the
// calling client-side span, but obviously the server side span is
// no longer a root span of the trace.
t.metrics.TracesStartedSampled.Inc(1)
} else if sp.firstInProcess {
t.metrics.TracesJoinedSampled.Inc(1)
}
} else {
t.metrics.SpansStartedNotSampled.Inc(1)
if newTrace {
t.metrics.TracesStartedNotSampled.Inc(1)
} else if sp.firstInProcess {
t.metrics.TracesJoinedNotSampled.Inc(1)
}
}
return sp
}
func (t *Tracer) reportSpan(sp *Span) {
t.metrics.SpansFinished.Inc(1)
if sp.context.IsSampled() {
t.reporter.Report(sp)
}
if t.options.poolSpans {
t.spanPool.Put(sp)
}
}
// randomID generates a random trace/span ID, using tracer.random() generator.
// It never returns 0.
func (t *Tracer) randomID() uint64 {
val := t.randomNumber()
for val == 0 {
val = t.randomNumber()
}
return val
}
// (NB) span must hold the lock before making this call
func (t *Tracer) setBaggage(sp *Span, key, value string) {
t.baggageSetter.setBaggage(sp, key, value)
}
// (NB) span must hold the lock before making this call
func (t *Tracer) isDebugAllowed(operation string) bool {
return t.debugThrottler.IsAllowed(operation)
}

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