libs/Yii/db/CDbTransaction.php

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<?php
/**
 * CDbTransaction class file
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CDbTransaction represents a DB transaction.
 *
 * It is usually created by calling {@link CDbConnection::beginTransaction}.
 *
 * The following code is a common scenario of using transactions:
 * <pre>
 * $transaction=$connection->beginTransaction();
 * try
 * {
 *    $connection->createCommand($sql1)->execute();
 *    $connection->createCommand($sql2)->execute();
 *    //.... other SQL executions
 *    $transaction->commit();
 * }
 * catch(Exception $e)
 * {
 *    $transaction->rollback();
 * }
 * </pre>
 *
 * @property CDbConnection $connection The DB connection for this transaction.
 * @property boolean $active Whether this transaction is active.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id$
 * @package system.db
 * @since 1.0
 */
class CDbTransaction extends CComponent
{
	private $_connection=null;
	private $_active;

	/**
	 * Constructor.
	 * @param CDbConnection $connection the connection associated with this transaction
	 * @see CDbConnection::beginTransaction
	 */
	public function __construct(CDbConnection $connection)
	{
		$this->_connection=$connection;
		$this->_active=true;
	}

	/**
	 * Commits a transaction.
	 * @throws CException if the transaction or the DB connection is not active.
	 */
	public function commit()
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