93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
// Copyright 2016 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 storage
|
|
|
|
// this is a clone of an earlier state of the ethereum ethdb/database
|
|
// no need for queueing/caching
|
|
|
|
import (
|
|
"github.com/ethereum/go-ethereum/metrics"
|
|
"github.com/syndtr/goleveldb/leveldb"
|
|
"github.com/syndtr/goleveldb/leveldb/iterator"
|
|
"github.com/syndtr/goleveldb/leveldb/opt"
|
|
)
|
|
|
|
const openFileLimit = 128
|
|
|
|
type LDBDatabase struct {
|
|
db *leveldb.DB
|
|
}
|
|
|
|
func NewLDBDatabase(file string) (*LDBDatabase, error) {
|
|
// Open the db
|
|
db, err := leveldb.OpenFile(file, &opt.Options{OpenFilesCacheCapacity: openFileLimit})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
database := &LDBDatabase{db: db}
|
|
|
|
return database, nil
|
|
}
|
|
|
|
func (db *LDBDatabase) Put(key []byte, value []byte) error {
|
|
metrics.GetOrRegisterCounter("ldbdatabase.put", nil).Inc(1)
|
|
|
|
return db.db.Put(key, value, nil)
|
|
}
|
|
|
|
func (db *LDBDatabase) Get(key []byte) ([]byte, error) {
|
|
metrics.GetOrRegisterCounter("ldbdatabase.get", nil).Inc(1)
|
|
|
|
dat, err := db.db.Get(key, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return dat, nil
|
|
}
|
|
|
|
func (db *LDBDatabase) Delete(key []byte) error {
|
|
return db.db.Delete(key, nil)
|
|
}
|
|
|
|
func (db *LDBDatabase) LastKnownTD() []byte {
|
|
data, _ := db.Get([]byte("LTD"))
|
|
|
|
if len(data) == 0 {
|
|
data = []byte{0x0}
|
|
}
|
|
|
|
return data
|
|
}
|
|
|
|
func (db *LDBDatabase) NewIterator() iterator.Iterator {
|
|
metrics.GetOrRegisterCounter("ldbdatabase.newiterator", nil).Inc(1)
|
|
|
|
return db.db.NewIterator(nil, nil)
|
|
}
|
|
|
|
func (db *LDBDatabase) Write(batch *leveldb.Batch) error {
|
|
metrics.GetOrRegisterCounter("ldbdatabase.write", nil).Inc(1)
|
|
|
|
return db.db.Write(batch, nil)
|
|
}
|
|
|
|
func (db *LDBDatabase) Close() {
|
|
// Close the leveldb database
|
|
db.db.Close()
|
|
}
|