Qiang Xue
13 years ago
5 changed files with 190 additions and 337 deletions
@ -1,113 +0,0 @@
|
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<?php |
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/** |
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* CacheDependency class file. |
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* |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright © 2008-2012 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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|
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namespace yii\caching; |
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|
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/** |
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* CacheDependency is the base class for cache dependency classes. |
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* |
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* CacheDependency implements the {@link ICacheDependency} interface. |
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* Child classes should override its {@link generateDependentData} for |
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* actual dependency checking. |
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* |
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* @property boolean $hasChanged Whether the dependency has changed. |
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* @property mixed $dependentData The data used to determine if dependency has been changed. |
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* This data is available after {@link evaluateDependency} is called. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @since 2.0 |
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*/ |
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class CacheDependency extends \yii\base\Object |
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{ |
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/** |
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* @var boolean Whether this dependency is reusable or not. |
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* If set to true, dependent data for this cache dependency will only be generated once per request. |
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* You can then use the same cache dependency for multiple separate cache calls on the same page |
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* without the overhead of re-evaluating the dependency each time. |
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* Defaults to false; |
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* @since 1.1.11 |
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*/ |
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public $reuseDependentData = false; |
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/** |
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* @var array cached data for reusable dependencies. |
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* @since 1.1.11 |
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*/ |
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private static $_reusableData = array(); |
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private $_hash; |
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private $_data; |
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/** |
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* Evaluates the dependency by generating and saving the data related with dependency. |
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* This method is invoked by cache before writing data into it. |
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*/ |
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public function evaluateDependency() |
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{ |
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if ($this->reuseDependentData) { |
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$hash = $this->getHash(); |
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if (!isset(self::$_reusableData[$hash]['dependentData'])) { |
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self::$_reusableData[$hash]['dependentData'] = $this->generateDependentData(); |
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} |
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$this->_data = self::$_reusableData[$hash]['dependentData']; |
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} else { |
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$this->_data = $this->generateDependentData(); |
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} |
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} |
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/** |
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* @return boolean whether the dependency has changed. |
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*/ |
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public function getHasChanged() |
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{ |
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if ($this->reuseDependentData) { |
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$hash = $this->getHash(); |
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if (!isset(self::$_reusableData[$hash]['hasChanged'])) { |
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if (!isset(self::$_reusableData[$hash]['dependentData'])) { |
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self::$_reusableData[$hash]['dependentData'] = $this->generateDependentData(); |
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} |
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self::$_reusableData[$hash]['hasChanged'] = self::$_reusableData[$hash]['dependentData'] != $this->_data; |
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} |
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return self::$_reusableData[$hash]['hasChanged']; |
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} else { |
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return $this->generateDependentData() != $this->_data; |
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} |
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} |
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/** |
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* @return mixed the data used to determine if dependency has been changed. |
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* This data is available after {@link evaluateDependency} is called. |
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*/ |
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public function getDependentData() |
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{ |
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return $this->_data; |
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} |
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|
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/** |
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* Generates the data needed to determine if dependency has been changed. |
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* Derived classes should override this method to generate actual dependent data. |
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* @return mixed the data needed to determine if dependency has been changed. |
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*/ |
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protected function generateDependentData() |
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{ |
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return null; |
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} |
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/** |
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* Generates a unique hash that identifies this cache dependency. |
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* @return string the hash for this cache dependency |
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*/ |
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private function getHash() |
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{ |
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if ($this->_hash === null) { |
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$this->_hash = sha1(serialize($this)); |
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} |
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return $this->_hash; |
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} |
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} |
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@ -0,0 +1,51 @@
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<?php |
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/** |
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* MemCacheServer class file |
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* |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright © 2008-2012 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\caching; |
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/** |
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* MemCacheServer represents the configuration data for a single memcache or memcached server. |
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* |
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* See [PHP manual](http://www.php.net/manual/en/function.Memcache-addServer.php) for detailed explanation |
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* of each configuration property. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @since 2.0 |
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*/ |
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class MemCacheServer extends \yii\base\Object |
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{ |
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/** |
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* @var string memcache server hostname or IP address |
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*/ |
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public $host; |
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/** |
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* @var integer memcache server port |
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*/ |
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public $port = 11211; |
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/** |
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* @var integer probability of using this server among all servers. |
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*/ |
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public $weight = 1; |
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/** |
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* @var boolean whether to use a persistent connection. This is used by memcache only. |
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*/ |
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public $persistent = true; |
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/** |
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* @var integer value in seconds which will be used for connecting to the server. This is used by memcache only. |
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*/ |
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public $timeout = 15; |
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/** |
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* @var integer how often a failed server will be retried (in seconds). This is used by memcache only. |
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*/ |
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public $retryInterval = 15; |
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/** |
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* @var boolean if the server should be flagged as online upon a failure. This is used by memcache only. |
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*/ |
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public $status = true; |
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} |
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