/
tx.go
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/
tx.go
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// Copyright 2014 Rana Ian. All rights reserved.
// Use of this source code is governed by The MIT License
// found in the accompanying LICENSE file.
package ora
/*
#include <oci.h>
#include <stdlib.h>
*/
import "C"
import (
"fmt"
"sync"
)
// LogTxCfg represents Tx logging configuration values.
type LogTxCfg struct {
// Commit determines whether the Tx.Commit method is logged.
//
// The default is true.
Commit bool
// Rollback determines whether the Tx.Rollback method is logged.
//
// The default is true.
Rollback bool
}
// NewLogTxCfg creates a LogTxCfg with default values.
func NewLogTxCfg() LogTxCfg {
c := LogTxCfg{}
c.Commit = true
c.Rollback = true
return c
}
// Tx represents an Oracle transaction associated with a session.
//
// Implements the driver.Tx interface.
type Tx struct {
id uint64
ses *Ses
mu sync.Mutex
}
// checkIsOpen validates that the session is open.
func (tx *Tx) checkIsOpen() error {
if tx == nil || tx.ses == nil {
return er("Tx is closed.")
}
return tx.ses.checkClosed()
}
// closeWithRemove releases allocated resources and removes the Tx from the
// Ses.openTxss list.
func (tx *Tx) closeWithRemove() (err error) {
tx.ses.openTxs.remove(tx)
return tx.close()
}
// close releases allocated resources.
func (tx *Tx) close() (err error) {
if tx.ses != nil {
tx.ses = nil
_drv.txPool.Put(tx)
}
return nil
}
// Commit commits the transaction.
//
// Commit is a member of the driver.Tx interface.
func (tx *Tx) Commit() (err error) {
tx.mu.Lock()
defer tx.mu.Unlock()
if tx == nil {
return nil
}
tx.log(_drv.cfg.Log.Tx.Commit)
if err = tx.checkIsOpen(); err != nil {
return err
}
defer tx.closeWithRemove()
r := C.OCITransCommit(
tx.ses.ocisvcctx, //OCISvcCtx *svchp,
tx.ses.srv.env.ocierr, //OCIError *errhp,
C.OCI_DEFAULT) //ub4 flags );
if r == C.OCI_ERROR {
return tx.ses.srv.env.ociError()
}
return nil
}
// Rollback rolls back a transaction.
//
// Rollback is a member of the driver.Tx interface.
func (tx *Tx) Rollback() (err error) {
tx.mu.Lock()
defer tx.mu.Unlock()
if tx == nil {
return nil
}
tx.log(_drv.cfg.Log.Tx.Rollback)
if err = tx.checkIsOpen(); err != nil {
return err
}
if tx.ses == nil || tx.ses.srv == nil {
return nil
}
defer tx.closeWithRemove()
r := C.OCITransRollback(
tx.ses.ocisvcctx, //OCISvcCtx *svchp,
tx.ses.srv.env.ocierr, //OCIError *errhp,
C.OCI_DEFAULT) //ub4 flags );
if r == C.OCI_ERROR {
return tx.ses.srv.env.ociError()
}
return nil
}
// sysName returns a string representing the Tx.
func (tx *Tx) sysName() string {
if tx == nil {
return "E_S_S_T_"
}
return tx.ses.sysName() + fmt.Sprintf("T%v", tx.id)
}
// log writes a message with an Tx system name and caller info.
func (tx *Tx) log(enabled bool, v ...interface{}) {
if enabled {
if len(v) == 0 {
_drv.cfg.Log.Logger.Infof("%v %v", tx.sysName(), callInfo(1))
} else {
_drv.cfg.Log.Logger.Infof("%v %v %v", tx.sysName(), callInfo(1), fmt.Sprint(v...))
}
}
}
// log writes a formatted message with an Tx system name and caller info.
func (tx *Tx) logF(enabled bool, format string, v ...interface{}) {
if enabled {
if len(v) == 0 {
_drv.cfg.Log.Logger.Infof("%v %v", tx.sysName(), callInfo(1))
} else {
_drv.cfg.Log.Logger.Infof("%v %v %v", tx.sysName(), callInfo(1), fmt.Sprintf(format, v...))
}
}
}