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<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\mutex; |
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use Yii; |
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use yii\base\InvalidConfigException; |
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/** |
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* MysqlMutex implements mutex "lock" mechanism via MySQL locks. |
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* |
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* Application configuration example: |
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* |
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* ``` |
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* [ |
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* 'components' => [ |
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* 'db' => [ |
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* 'class' => 'yii\db\Connection', |
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* 'dsn' => 'mysql:host=127.0.0.1;dbname=demo', |
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* ] |
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* 'mutex' => [ |
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* 'class' => 'yii\mutex\MysqlMutex', |
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* ], |
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* ], |
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* ] |
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* ``` |
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* |
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* @see Mutex |
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* |
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* @author resurtm <[email protected]> |
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* @since 2.0 |
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*/ |
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class MysqlMutex extends DbMutex |
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{ |
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/** |
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* Initializes MySQL specific mutex component implementation. |
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* @throws InvalidConfigException if [[db]] is not MySQL connection. |
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*/ |
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public function init() |
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{ |
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parent::init(); |
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if ($this->db->driverName !== 'mysql') { |
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throw new InvalidConfigException('In order to use MysqlMutex connection must be configured to use MySQL database.'); |
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} |
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} |
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/** |
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* Acquires lock by given name. |
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* @param string $name of the lock to be acquired. |
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* @param int $timeout to wait for lock to become released. |
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* @return bool acquiring result. |
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* @see http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_get-lock |
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*/ |
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protected function acquireLock($name, $timeout = 0) |
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{ |
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return (bool) $this->db |
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->createCommand('SELECT GET_LOCK(:name, :timeout)', [':name' => $name, ':timeout' => $timeout]) |
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->queryScalar(); |
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} |
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/** |
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* Releases lock by given name. |
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* @param string $name of the lock to be released. |
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* @return bool release result. |
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* @see http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_release-lock |
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*/ |
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protected function releaseLock($name) |
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{ |
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return (bool) $this->db |
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->createCommand('SELECT RELEASE_LOCK(:name)', [':name' => $name]) |
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->queryScalar(); |
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} |
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} |
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yiisoft /
yii2
