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mvcc/backend: clean up mutex, logging

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Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
This commit is contained in:
Gyuho Lee 2018-05-23 12:09:03 -07:00
parent dd1baf6e96
commit 58e3ead219
1 changed files with 9 additions and 13 deletions
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22
mvcc/backend/batch_tx.go
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@ -183,15 +183,15 @@ func unsafeForEach(tx *bolt.Tx, bucket []byte, visitor func(k, v []byte) error)
// Commit commits a previous tx and begins a new writable one.
func (t *batchTx) Commit() {
t.Lock()
defer t.Unlock()
t.commit(false)
t.Unlock()
}
// CommitAndStop commits the previous tx and does not create a new one.
func (t *batchTx) CommitAndStop() {
t.Lock()
defer t.Unlock()
t.commit(true)
t.Unlock()
}
func (t *batchTx) Unlock() {
@ -215,19 +215,18 @@ func (t *batchTx) commit(stop bool) {
}
start := time.Now()
// gofail: var beforeCommit struct{}
err := t.tx.Commit()
// gofail: var afterCommit struct{}
commitDurations.Observe(time.Since(start).Seconds())
atomic.AddInt64(&t.backend.commits, 1)
t.pending = 0
if err != nil {
if t.backend.lg != nil {
t.backend.lg.Fatal(
"failed to commit tx",
zap.Error(err),
)
t.backend.lg.Fatal("failed to commit tx", zap.Error(err))
} else {
plog.Fatalf("cannot commit tx (%s)", err)
}
@ -269,31 +268,28 @@ func (t *batchTxBuffered) Unlock() {
func (t *batchTxBuffered) Commit() {
t.Lock()
defer t.Unlock()
t.commit(false)
t.Unlock()
}
func (t *batchTxBuffered) CommitAndStop() {
t.Lock()
defer t.Unlock()
t.commit(true)
t.Unlock()
}
func (t *batchTxBuffered) commit(stop bool) {
// all read txs must be closed to acquire boltdb commit rwlock
t.backend.readTx.mu.Lock()
defer t.backend.readTx.mu.Unlock()
t.unsafeCommit(stop)
t.backend.readTx.mu.Unlock()
}
func (t *batchTxBuffered) unsafeCommit(stop bool) {
if t.backend.readTx.tx != nil {
if err := t.backend.readTx.tx.Rollback(); err != nil {
if t.backend.lg != nil {
t.backend.lg.Fatal(
"failed to rollback tx",
zap.Error(err),
)
t.backend.lg.Fatal("failed to rollback tx", zap.Error(err))
} else {
plog.Fatalf("cannot rollback tx (%s)", err)
}