swarm: codebase split from go-ethereum (#1405)

2019-06-03 12:28:18 +02:00
parent 7a22da98b9
commit b046760db1
1540 changed files with 4654 additions and 129393 deletions
--- a/storage/localstore/mode_put.go
+++ b/storage/localstore/mode_put.go
@@ -0,0 +1,176 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package localstore
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/ethereum/go-ethereum/metrics"
+	"github.com/ethersphere/swarm/chunk"
+	"github.com/ethersphere/swarm/shed"
+	"github.com/syndtr/goleveldb/leveldb"
+)
+
+// Put stores the Chunk to database and depending
+// on the Putter mode, it updates required indexes.
+// Put is required to implement chunk.Store
+// interface.
+func (db *DB) Put(ctx context.Context, mode chunk.ModePut, ch chunk.Chunk) (exists bool, err error) {
+	metricName := fmt.Sprintf("localstore.Put.%s", mode)
+
+	metrics.GetOrRegisterCounter(metricName, nil).Inc(1)
+	defer totalTimeMetric(metricName, time.Now())
+
+	exists, err = db.put(mode, chunkToItem(ch))
+	if err != nil {
+		metrics.GetOrRegisterCounter(metricName+".error", nil).Inc(1)
+	}
+	return exists, err
+}
+
+// put stores Item to database and updates other
+// indexes. It acquires lockAddr to protect two calls
+// of this function for the same address in parallel.
+// Item fields Address and Data must not be
+// with their nil values.
+func (db *DB) put(mode chunk.ModePut, item shed.Item) (exists bool, err error) {
+	// protect parallel updates
+	db.batchMu.Lock()
+	defer db.batchMu.Unlock()
+
+	batch := new(leveldb.Batch)
+
+	// variables that provide information for operations
+	// to be done after write batch function successfully executes
+	var gcSizeChange int64   // number to add or subtract from gcSize
+	var triggerPullFeed bool // signal pull feed subscriptions to iterate
+	var triggerPushFeed bool // signal push feed subscriptions to iterate
+
+	switch mode {
+	case chunk.ModePutRequest:
+		// put to indexes: retrieve, gc; it does not enter the syncpool
+
+		// check if the chunk already is in the database
+		// as gc index is updated
+		i, err := db.retrievalAccessIndex.Get(item)
+		switch err {
+		case nil:
+			exists = true
+			item.AccessTimestamp = i.AccessTimestamp
+		case leveldb.ErrNotFound:
+			exists = false
+			// no chunk accesses
+		default:
+			return false, err
+		}
+		i, err = db.retrievalDataIndex.Get(item)
+		switch err {
+		case nil:
+			exists = true
+			item.StoreTimestamp = i.StoreTimestamp
+			item.BinID = i.BinID
+		case leveldb.ErrNotFound:
+			// no chunk accesses
+			exists = false
+		default:
+			return false, err
+		}
+		if item.AccessTimestamp != 0 {
+			// delete current entry from the gc index
+			db.gcIndex.DeleteInBatch(batch, item)
+			gcSizeChange--
+		}
+		if item.StoreTimestamp == 0 {
+			item.StoreTimestamp = now()
+		}
+		if item.BinID == 0 {
+			item.BinID, err = db.binIDs.IncInBatch(batch, uint64(db.po(item.Address)))
+			if err != nil {
+				return false, err
+			}
+		}
+		// update access timestamp
+		item.AccessTimestamp = now()
+		// update retrieve access index
+		db.retrievalAccessIndex.PutInBatch(batch, item)
+		// add new entry to gc index
+		db.gcIndex.PutInBatch(batch, item)
+		gcSizeChange++
+
+		db.retrievalDataIndex.PutInBatch(batch, item)
+
+	case chunk.ModePutUpload:
+		// put to indexes: retrieve, push, pull
+
+		exists, err = db.retrievalDataIndex.Has(item)
+		if err != nil {
+			return false, err
+		}
+		if !exists {
+			item.StoreTimestamp = now()
+			item.BinID, err = db.binIDs.IncInBatch(batch, uint64(db.po(item.Address)))
+			if err != nil {
+				return false, err
+			}
+			db.retrievalDataIndex.PutInBatch(batch, item)
+			db.pullIndex.PutInBatch(batch, item)
+			triggerPullFeed = true
+			db.pushIndex.PutInBatch(batch, item)
+			triggerPushFeed = true
+		}
+
+	case chunk.ModePutSync:
+		// put to indexes: retrieve, pull
+
+		exists, err = db.retrievalDataIndex.Has(item)
+		if err != nil {
+			return exists, err
+		}
+		if !exists {
+			item.StoreTimestamp = now()
+			item.BinID, err = db.binIDs.IncInBatch(batch, uint64(db.po(item.Address)))
+			if err != nil {
+				return false, err
+			}
+			db.retrievalDataIndex.PutInBatch(batch, item)
+			db.pullIndex.PutInBatch(batch, item)
+			triggerPullFeed = true
+		}
+
+	default:
+		return false, ErrInvalidMode
+	}
+
+	err = db.incGCSizeInBatch(batch, gcSizeChange)
+	if err != nil {
+		return false, err
+	}
+
+	err = db.shed.WriteBatch(batch)
+	if err != nil {
+		return false, err
+	}
+	if triggerPullFeed {
+		db.triggerPullSubscriptions(db.po(item.Address))
+	}
+	if triggerPushFeed {
+		db.triggerPushSubscriptions()
+	}
+	return exists, nil
+}