ledisdb/ledis/tx.go

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package ledis
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import (
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"github.com/siddontang/ledisdb/store"
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"sync"
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)
type tx struct {
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m sync.Mutex
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l *Ledis
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wb *store.WriteBatch
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binlog *BinLog
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batch [][]byte
}
func newTx(l *Ledis) *tx {
t := new(tx)
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t.l = l
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t.wb = l.ldb.NewWriteBatch()
t.batch = make([][]byte, 0, 4)
t.binlog = l.binlog
return t
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}
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func (t *tx) Close() {
t.wb.Close()
}
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func (t *tx) Put(key []byte, value []byte) {
t.wb.Put(key, value)
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if t.binlog != nil {
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buf := encodeBinLogPut(key, value)
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t.batch = append(t.batch, buf)
}
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}
func (t *tx) Delete(key []byte) {
t.wb.Delete(key)
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if t.binlog != nil {
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buf := encodeBinLogDelete(key)
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t.batch = append(t.batch, buf)
}
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}
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func (t *tx) Lock() {
t.m.Lock()
}
func (t *tx) Unlock() {
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t.batch = t.batch[0:0]
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t.wb.Rollback()
t.m.Unlock()
}
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func (t *tx) Commit() error {
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var err error
if t.binlog != nil {
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t.l.Lock()
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err = t.wb.Commit()
if err != nil {
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t.l.Unlock()
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return err
}
err = t.binlog.Log(t.batch...)
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t.l.Unlock()
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} else {
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t.l.Lock()
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err = t.wb.Commit()
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t.l.Unlock()
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}
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return err
}
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func (t *tx) Rollback() {
t.wb.Rollback()
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}