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<?php
/**
* Transaction class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\redis;
use yii\base\InvalidConfigException;
use yii\db\Exception;
/**
* Transaction represents a DB transaction.
*
* @property boolean $isActive Whether the transaction is active. This property is read-only.
*
* @since 2.0
*/
class Transaction extends \yii\base\Object
{
/**
* @var Connection the database connection that this transaction is associated with.
*/
public $db;
/**
* @var boolean whether this transaction is active. Only an active transaction
* can [[commit()]] or [[rollBack()]]. This property is set true when the transaction is started.
*/
private $_active = false;
/**
* Returns a value indicating whether this transaction is active.
* @return boolean whether this transaction is active. Only an active transaction
* can [[commit()]] or [[rollBack()]].
*/
public function getIsActive()
{
return $this->_active;
}
/**
* Begins a transaction.
* @throws InvalidConfigException if [[connection]] is null
*/
public function begin()
{
if (!$this->_active) {
if ($this->db === null) {
throw new InvalidConfigException('Transaction::db must be set.');
}
\Yii::trace('Starting transaction', __CLASS__);
$this->db->open();
$this->db->createCommand('MULTI')->execute();
$this->_active = true;
}
}
/**
* Commits a transaction.
* @throws Exception if the transaction or the DB connection is not active.
*/
public function commit()
{
if ($this->_active && $this->db && $this->db->isActive) {
\Yii::trace('Committing transaction', __CLASS__);
$this->db->createCommand('EXEC')->execute();
// TODO handle result of EXEC
$this->_active = false;
} else {
throw new Exception('Failed to commit transaction: transaction was inactive.');
}
}
/**
* Rolls back a transaction.
* @throws Exception if the transaction or the DB connection is not active.
*/
public function rollback()
{
if ($this->_active && $this->db && $this->db->isActive) {
\Yii::trace('Rolling back transaction', __CLASS__);
$this->db->pdo->commit();
$this->_active = false;
} else {
throw new Exception('Failed to roll back transaction: transaction was inactive.');
}
}
}