| 1 | <?php |
| 2 | /* |
| 3 | * $Id: Mysql.php 2702 2007-10-03 21:43:22Z Jonathan.Wage $ |
| 4 | * |
| 5 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 6 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 7 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 8 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 9 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 10 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 11 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 12 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 13 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 14 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 15 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 16 | * |
| 17 | * This software consists of voluntary contributions made by many individuals |
| 18 | * and is licensed under the LGPL. For more information, see |
| 19 | * <http://www.phpdoctrine.com>. |
| 20 | */ |
| 21 | Doctrine::autoload('Doctrine_Transaction'); |
| 22 | /** |
| 23 | * |
| 24 | * @author Konsta Vesterinen <kvesteri@cc.hut.fi> |
| 25 | * @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library) |
| 26 | * @license http://www.opensource.org/licenses/lgpl-license.php LGPL |
| 27 | * @package Doctrine |
| 28 | * @subpackage Transaction |
| 29 | * @link www.phpdoctrine.com |
| 30 | * @since 1.0 |
| 31 | * @version $Revision: 2702 $ |
| 32 | */ |
| 33 | class Doctrine_Transaction_Mysql extends Doctrine_Transaction |
| 34 | { |
| 35 | /** |
| 36 | * createSavepoint |
| 37 | * creates a new savepoint |
| 38 | * |
| 39 | * @param string $savepoint name of a savepoint to set |
| 40 | * @return void |
| 41 | */ |
| 42 | protected function createSavePoint($savepoint) |
| 43 | { |
| 44 | $query = 'SAVEPOINT ' . $savepoint; |
| 45 | |
| 46 | return $this->conn->execute($query); |
| 47 | } |
| 48 | /** |
| 49 | * releaseSavePoint |
| 50 | * releases given savepoint |
| 51 | * |
| 52 | * @param string $savepoint name of a savepoint to release |
| 53 | * @return void |
| 54 | */ |
| 55 | protected function releaseSavePoint($savepoint) |
| 56 | { |
| 57 | $query = 'RELEASE SAVEPOINT ' . $savepoint; |
| 58 | |
| 59 | return $this->conn->execute($query); |
| 60 | } |
| 61 | /** |
| 62 | * rollbackSavePoint |
| 63 | * releases given savepoint |
| 64 | * |
| 65 | * @param string $savepoint name of a savepoint to rollback to |
| 66 | * @return void |
| 67 | */ |
| 68 | protected function rollbackSavePoint($savepoint) |
| 69 | { |
| 70 | $query = 'ROLLBACK TO SAVEPOINT ' . $savepoint; |
| 71 | |
| 72 | return $this->conn->execute($query); |
| 73 | } |
| 74 | /** |
| 75 | * Set the transacton isolation level. |
| 76 | * |
| 77 | * @param string standard isolation level |
| 78 | * READ UNCOMMITTED (allows dirty reads) |
| 79 | * READ COMMITTED (prevents dirty reads) |
| 80 | * REPEATABLE READ (prevents nonrepeatable reads) |
| 81 | * SERIALIZABLE (prevents phantom reads) |
| 82 | * |
| 83 | * @throws Doctrine_Transaction_Exception if using unknown isolation level |
| 84 | * @throws PDOException if something fails at the PDO level |
| 85 | * @return void |
| 86 | */ |
| 87 | public function setIsolation($isolation) |
| 88 | { |
| 89 | switch ($isolation) { |
| 90 | case 'READ UNCOMMITTED': |
| 91 | case 'READ COMMITTED': |
| 92 | case 'REPEATABLE READ': |
| 93 | case 'SERIALIZABLE': |
| 94 | break; |
| 95 | default: |
| 96 | throw new Doctrine_Transaction_Exception('Isolation level ' . $isolation . ' is not supported.'); |
| 97 | } |
| 98 | |
| 99 | $query = 'SET SESSION TRANSACTION ISOLATION LEVEL ' . $isolation; |
| 100 | |
| 101 | return $this->conn->execute($query); |
| 102 | } |
| 103 | /** |
| 104 | * getTransactionIsolation |
| 105 | * |
| 106 | * @return string returns the current session transaction isolation level |
| 107 | */ |
| 108 | public function getIsolation() |
| 109 | { |
| 110 | return $this->conn->fetchOne('SELECT @@tx_isolation'); |
| 111 | } |
| 112 | } |