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-rwxr-xr-xframework/Db/TDbTransaction.php111
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diff --git a/framework/Db/TDbTransaction.php b/framework/Db/TDbTransaction.php
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+<?php
+/**
+ * TDbTransaction class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2009 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+Prado::using('System.Db.TDbDataReader');
+
+
+/**
+ * TDbTransaction represents a DB transaction.
+ *
+ * It is usually created by calling {@link TDbConnection::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>
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package system.db
+ * @since 1.0
+ */
+class TDbTransaction extends TComponent
+{
+ private $_connection=null;
+ private $_active;
+
+ /**
+ * Constructor.
+ * @param TDbConnection the connection associated with this transaction
+ * @see TDbConnection::beginTransaction
+ */
+ public function __construct(TDbConnection $connection)
+ {
+ $this->_connection=$connection;
+ $this->setActive(true);
+ }
+
+ /**
+ * Commits a transaction.
+ * @throws CException if the transaction or the DB connection is not active.
+ */
+ public function commit()
+ {
+ if($this->_active && $this->_connection->getActive())
+ {
+ Prado::trace('Committing transaction','system.db.TDbTransaction');
+ $this->_connection->getPdoInstance()->commit();
+ $this->_active=false;
+ }
+ else
+ throw new TDbException('dbtransaction_transaction_inactive');
+ }
+
+ /**
+ * Rolls back a transaction.
+ * @throws CException if the transaction or the DB connection is not active.
+ */
+ public function rollback()
+ {
+ if($this->_active && $this->_connection->getActive())
+ {
+ Prado::trace('Rolling back transaction','system.db.TDbTransaction');
+ $this->_connection->getPdoInstance()->rollBack();
+ $this->_active=false;
+ }
+ else
+ throw new TDbException('dbtransaction_transaction_inactive');
+ }
+
+ /**
+ * @return TDbConnection the DB connection for this transaction
+ */
+ public function getConnection()
+ {
+ return $this->_connection;
+ }
+
+ /**
+ * @return boolean whether this transaction is active
+ */
+ public function getActive()
+ {
+ return $this->_active;
+ }
+
+ /**
+ * @param boolean whether this transaction is active
+ */
+ protected function setActive($value)
+ {
+ $this->_active=TPropertyValue::ensureBoolean($value);
+ }
+}