mirror of
https://github.com/yiisoft/yii2.git
synced 2025-11-04 06:37:55 +08:00
74 lines
2.1 KiB
PHP
74 lines
2.1 KiB
PHP
<?php
|
|
/**
|
|
* @link http://www.yiiframework.com/
|
|
* @copyright Copyright (c) 2008 Yii Software LLC
|
|
* @license http://www.yiiframework.com/license/
|
|
*/
|
|
|
|
namespace yii\caching;
|
|
use yii\base\InvalidConfigException;
|
|
|
|
/**
|
|
* GroupDependency marks a cached data item with a group name.
|
|
*
|
|
* You may invalidate the cached data items with the same group name all at once
|
|
* by calling [[invalidate()]].
|
|
*
|
|
* @author Qiang Xue <qiang.xue@gmail.com>
|
|
* @since 2.0
|
|
*/
|
|
class GroupDependency extends Dependency
|
|
{
|
|
/**
|
|
* @var string the group name. This property must be set.
|
|
*/
|
|
public $group;
|
|
|
|
/**
|
|
* Generates the data needed to determine if dependency has been changed.
|
|
* This method does nothing in this class.
|
|
* @param Cache $cache the cache component that is currently evaluating this dependency
|
|
* @return mixed the data needed to determine if dependency has been changed.
|
|
* @throws InvalidConfigException if [[group]] is not set.
|
|
*/
|
|
protected function generateDependencyData($cache)
|
|
{
|
|
if ($this->group === null) {
|
|
throw new InvalidConfigException('GroupDependency::group must be set');
|
|
}
|
|
$version = $cache->get([__CLASS__, $this->group]);
|
|
if ($version === false) {
|
|
$version = $this->invalidate($cache, $this->group);
|
|
}
|
|
return $version;
|
|
}
|
|
|
|
/**
|
|
* Performs the actual dependency checking.
|
|
* @param Cache $cache the cache component that is currently evaluating this dependency
|
|
* @return boolean whether the dependency is changed or not.
|
|
* @throws InvalidConfigException if [[group]] is not set.
|
|
*/
|
|
public function getHasChanged($cache)
|
|
{
|
|
if ($this->group === null) {
|
|
throw new InvalidConfigException('GroupDependency::group must be set');
|
|
}
|
|
$version = $cache->get([__CLASS__, $this->group]);
|
|
return $version === false || $version !== $this->data;
|
|
}
|
|
|
|
/**
|
|
* Invalidates all of the cached data items that have the same [[group]].
|
|
* @param Cache $cache the cache component that caches the data items
|
|
* @param string $group the group name
|
|
* @return string the current version number
|
|
*/
|
|
public static function invalidate($cache, $group)
|
|
{
|
|
$version = microtime();
|
|
$cache->set([__CLASS__, $group], $version);
|
|
return $version;
|
|
}
|
|
}
|