<?php /** * @link http://www.yiiframework.com/ * @copyright Copyright (c) 2008 Yii Software LLC * @license http://www.yiiframework.com/license/ */ namespace yii\mutex; use Yii; use yii\db\Connection; use yii\base\InvalidConfigException; /** * @author resurtm <resurtm@gmail.com> * @since 2.0 */ abstract class DbMutex extends Mutex { /** * @var Connection|string the DB connection object or the application component ID of the DB connection. * After the Mutex object is created, if you want to change this property, you should only assign * it with a DB connection object. */ public $db = 'db'; /** * Initializes generic database table based mutex implementation. * @throws InvalidConfigException if [[db]] is invalid. */ public function init() { parent::init(); if (is_string($this->db)) { $this->db = Yii::$app->getComponent($this->db); } if (!$this->db instanceof Connection) { throw new InvalidConfigException('Mutex::db must be either a DB connection instance or the application component ID of a DB connection.'); } } }