97 lines
2.7 KiB
PHP
97 lines
2.7 KiB
PHP
<?php
|
|
/**
|
|
* @link http://www.yiiframework.com/
|
|
* @copyright Copyright (c) 2008 Yii Software LLC
|
|
* @license http://www.yiiframework.com/license/
|
|
*/
|
|
|
|
namespace yii\mutex;
|
|
|
|
use yii\base\InvalidConfigException;
|
|
|
|
/**
|
|
* MysqlMutex implements mutex "lock" mechanism via MySQL locks.
|
|
*
|
|
* Application configuration example:
|
|
*
|
|
* ```
|
|
* [
|
|
* 'components' => [
|
|
* 'db' => [
|
|
* 'class' => 'yii\db\Connection',
|
|
* 'dsn' => 'mysql:host=127.0.0.1;dbname=demo',
|
|
* ]
|
|
* 'mutex' => [
|
|
* 'class' => 'yii\mutex\MysqlMutex',
|
|
* ],
|
|
* ],
|
|
* ]
|
|
* ```
|
|
*
|
|
* @see Mutex
|
|
*
|
|
* @author resurtm <resurtm@gmail.com>
|
|
* @since 2.0
|
|
*/
|
|
class MysqlMutex extends DbMutex
|
|
{
|
|
/**
|
|
* Initializes MySQL specific mutex component implementation.
|
|
* @throws InvalidConfigException if [[db]] is not MySQL connection.
|
|
*/
|
|
public function init()
|
|
{
|
|
parent::init();
|
|
if ($this->db->driverName !== 'mysql') {
|
|
throw new InvalidConfigException('In order to use MysqlMutex connection must be configured to use MySQL database.');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Acquires lock by given name.
|
|
* @param string $name of the lock to be acquired.
|
|
* @param int $timeout time (in seconds) to wait for lock to become released.
|
|
* @return bool acquiring result.
|
|
* @see http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_get-lock
|
|
*/
|
|
protected function acquireLock($name, $timeout = 0)
|
|
{
|
|
return $this->db->useMaster(function ($db) use ($name, $timeout) {
|
|
/** @var \yii\db\Connection $db */
|
|
return (bool) $db->createCommand(
|
|
'SELECT GET_LOCK(:name, :timeout)',
|
|
[':name' => $this->hashLockName($name), ':timeout' => $timeout]
|
|
)->queryScalar();
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Releases lock by given name.
|
|
* @param string $name of the lock to be released.
|
|
* @return bool release result.
|
|
* @see http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_release-lock
|
|
*/
|
|
protected function releaseLock($name)
|
|
{
|
|
return $this->db->useMaster(function ($db) use ($name) {
|
|
/** @var \yii\db\Connection $db */
|
|
return (bool) $db->createCommand(
|
|
'SELECT RELEASE_LOCK(:name)',
|
|
[':name' => $this->hashLockName($name)]
|
|
)->queryScalar();
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Generate hash for lock name to avoid exceeding lock name length limit.
|
|
*
|
|
* @param string $name
|
|
* @return string
|
|
* @since 2.0.16
|
|
* @see https://github.com/yiisoft/yii2/pull/16836
|
|
*/
|
|
protected function hashLockName($name) {
|
|
return sha1($name);
|
|
}
|
|
}
|