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batch.go
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batch.go
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package ledis
import (
"sync"
"github.com/enefuture/ledisdb/rpl"
"github.com/enefuture/ledisdb/store"
"github.com/siddontang/go/log"
)
// 批量操作
type batch struct {
l *Ledis
*store.WriteBatch
sync.Locker
// tx *Tx
}
func (b *batch) Commit() error {
if b.l.cfg.GetReadonly() {
return ErrWriteInROnly
}
return b.l.handleCommit(b.WriteBatch, b.WriteBatch)
// if b.tx == nil {
// return b.l.handleCommit(b.WriteBatch, b.WriteBatch)
// } else {
// if b.l.r != nil {
// if err := b.tx.data.Append(b.WriteBatch.BatchData()); err != nil {
// return err
// }
// }
// return b.WriteBatch.Commit()
// }
}
func (b *batch) Lock() {
b.Locker.Lock()
}
func (b *batch) Unlock() {
b.WriteBatch.Rollback()
b.Locker.Unlock()
}
func (b *batch) Put(key []byte, value []byte) {
b.WriteBatch.Put(key, value)
}
func (b *batch) Delete(key []byte) {
b.WriteBatch.Delete(key)
}
type dbBatchLocker struct {
l *sync.Mutex
wrLock *sync.RWMutex
}
func (l *dbBatchLocker) Lock() {
l.wrLock.RLock()
l.l.Lock()
}
func (l *dbBatchLocker) Unlock() {
l.l.Unlock()
l.wrLock.RUnlock()
}
// type txBatchLocker struct {
// }
// func (l *txBatchLocker) Lock() {}
// func (l *txBatchLocker) Unlock() {}
// type multiBatchLocker struct {
// }
// func (l *multiBatchLocker) Lock() {}
// func (l *multiBatchLocker) Unlock() {}
func (l *Ledis) newBatch(wb *store.WriteBatch, locker sync.Locker) *batch {
b := new(batch)
b.l = l
b.WriteBatch = wb
b.Locker = locker
return b
}
type commiter interface {
Commit() error
}
type commitDataGetter interface {
Data() []byte
}
func (l *Ledis) handleCommit(g commitDataGetter, c commiter) error {
l.commitLock.Lock()
var err error
if l.r != nil {
var rl *rpl.Log
if rl, err = l.r.Log(g.Data()); err != nil {
l.commitLock.Unlock()
log.Fatalf("write wal error %s", err.Error())
return err
}
l.propagate(rl)
if err = c.Commit(); err != nil {
l.commitLock.Unlock()
log.Fatalf("commit error %s", err.Error())
l.noticeReplication()
return err
}
if err = l.r.UpdateCommitID(rl.ID); err != nil {
l.commitLock.Unlock()
log.Fatalf("update commit id error %s", err.Error())
l.noticeReplication()
return err
}
} else {
err = c.Commit()
}
l.commitLock.Unlock()
return err
}