/
transaction.go
144 lines (131 loc) · 3.24 KB
/
transaction.go
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"strings"
"time"
)
import (
"github.com/pkg/errors"
"github.com/transaction-wg/seata-golang/pkg/base/meta"
"github.com/transaction-wg/seata-golang/pkg/client/config"
"github.com/transaction-wg/seata-golang/pkg/util/log"
)
type mysqlTx struct {
mc *mysqlConn
}
func (tx *mysqlTx) Commit() (err error) {
defer func() {
if tx.mc != nil {
tx.mc.ctx = nil
}
tx.mc = nil
}()
if tx.mc == nil || tx.mc.closed.IsSet() {
return ErrInvalidConn
}
if tx.mc.ctx != nil {
branchID, err := tx.register()
if err != nil {
rollBackErr := tx.mc.exec("ROLLBACK")
if rollBackErr != nil {
log.Error(rollBackErr)
}
return err
}
tx.mc.ctx.branchID = branchID
if len(tx.mc.ctx.sqlUndoItemsBuffer) > 0 {
err = GetUndoLogManager().FlushUndoLogs(tx.mc)
if err != nil {
reportErr := tx.report(false)
if reportErr != nil {
return reportErr
}
return err
}
err = tx.mc.exec("COMMIT")
if err != nil {
reportErr := tx.report(false)
if reportErr != nil {
return reportErr
}
return err
}
} else {
err = tx.mc.exec("COMMIT")
return err
}
} else {
err = tx.mc.exec("COMMIT")
return err
}
return
}
func (tx *mysqlTx) Rollback() (err error) {
defer func() {
if tx.mc != nil {
tx.mc.ctx = nil
}
tx.mc = nil
}()
if tx.mc == nil || tx.mc.closed.IsSet() {
return ErrInvalidConn
}
err = tx.mc.exec("ROLLBACK")
if tx.mc.ctx != nil {
branchID, err := tx.register()
if err != nil {
return err
}
tx.mc.ctx.branchID = branchID
tx.report(false)
}
return
}
func (tx *mysqlTx) register() (int64, error) {
var branchID int64
var err error
for retryCount := 0; retryCount < config.GetATConfig().LockRetryTimes; retryCount++ {
branchID, err = dataSourceManager.BranchRegister(meta.BranchTypeAT, tx.mc.cfg.DBName, "", tx.mc.ctx.xid,
nil, strings.Join(tx.mc.ctx.lockKeys, ";"))
if err == nil {
break
}
log.Errorf("branch register err: %v", err)
var tex *meta.TransactionException
if errors.As(err, &tex) {
if tex.Code == meta.TransactionExceptionCodeGlobalTransactionNotExist {
break
}
}
time.Sleep(config.GetATConfig().LockRetryInterval)
}
return branchID, err
}
func (tx *mysqlTx) report(commitDone bool) error {
retry := config.GetATConfig().LockRetryTimes
for retry > 0 {
var err error
if commitDone {
err = dataSourceManager.BranchReport(meta.BranchTypeAT, tx.mc.ctx.xid, tx.mc.ctx.branchID,
meta.BranchStatusPhaseoneDone, nil)
} else {
err = dataSourceManager.BranchReport(meta.BranchTypeAT, tx.mc.ctx.xid, tx.mc.ctx.branchID,
meta.BranchStatusPhaseoneFailed, nil)
}
if err != nil {
log.Errorf("Failed to report [%d/%s] commit done [%t] Retry Countdown: %d",
tx.mc.ctx.branchID, tx.mc.ctx.xid, commitDone, retry)
}
retry = retry - 1
if retry == 0 {
return errors.WithMessagef(err, "Failed to report branch status %t", commitDone)
}
}
return nil
}