b6a95a8cb3
* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
118 lines
2.8 KiB
Go
118 lines
2.8 KiB
Go
// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package goleveldb
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import (
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"sync"
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"github.com/juju/errors"
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"github.com/pingcap/tidb/store/localstore/engine"
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"github.com/syndtr/goleveldb/leveldb"
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"github.com/syndtr/goleveldb/leveldb/opt"
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"github.com/syndtr/goleveldb/leveldb/storage"
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"github.com/syndtr/goleveldb/leveldb/util"
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)
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var (
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_ engine.DB = (*db)(nil)
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_ engine.Batch = (*leveldb.Batch)(nil)
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)
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var (
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p = sync.Pool{
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New: func() interface{} {
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return &leveldb.Batch{}
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},
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}
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)
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type db struct {
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*leveldb.DB
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}
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func (d *db) Get(key []byte) ([]byte, error) {
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v, err := d.DB.Get(key, nil)
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if err == leveldb.ErrNotFound {
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return nil, errors.Trace(engine.ErrNotFound)
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}
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return v, err
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}
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func (d *db) NewBatch() engine.Batch {
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b := p.Get().(*leveldb.Batch)
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return b
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}
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func (d *db) Seek(startKey []byte) ([]byte, []byte, error) {
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iter := d.DB.NewIterator(&util.Range{Start: startKey}, nil)
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defer iter.Release()
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if ok := iter.First(); !ok {
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return nil, nil, errors.Trace(engine.ErrNotFound)
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}
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return iter.Key(), iter.Value(), nil
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}
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func (d *db) MultiSeek(keys [][]byte) []*engine.MSeekResult {
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iter := d.DB.NewIterator(&util.Range{Start: []byte{0x0}}, nil)
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defer iter.Release()
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res := make([]*engine.MSeekResult, 0, len(keys))
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for _, k := range keys {
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if ok := iter.Seek(k); !ok {
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res = append(res, &engine.MSeekResult{Err: engine.ErrNotFound})
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} else {
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res = append(res, &engine.MSeekResult{
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Key: append([]byte(nil), iter.Key()...),
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Value: append([]byte(nil), iter.Value()...),
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})
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}
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}
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return res
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}
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func (d *db) Commit(b engine.Batch) error {
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batch, ok := b.(*leveldb.Batch)
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if !ok {
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return errors.Errorf("invalid batch type %T", b)
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}
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err := d.DB.Write(batch, nil)
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batch.Reset()
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p.Put(batch)
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return err
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}
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func (d *db) Close() error {
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return d.DB.Close()
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}
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// Driver implements engine Driver.
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type Driver struct {
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}
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// Open opens or creates a local storage database for the given path.
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func (driver Driver) Open(path string) (engine.DB, error) {
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d, err := leveldb.OpenFile(path, &opt.Options{BlockCacheCapacity: 600 * 1024 * 1024})
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return &db{d}, err
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}
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// MemoryDriver implements engine Driver
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type MemoryDriver struct {
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}
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// Open opens a memory storage database.
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func (driver MemoryDriver) Open(path string) (engine.DB, error) {
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d, err := leveldb.Open(storage.NewMemStorage(), nil)
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return &db{d}, err
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}
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