124 lines
3.4 KiB
PHP
124 lines
3.4 KiB
PHP
<?php
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/**
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* APC storage engine for cache.
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*
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.cache
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* @since CakePHP(tm) v 1.2.0.4933
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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/**
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* APC storage engine for cache
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*
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* @package cake
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* @subpackage cake.cake.libs.cache
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*/
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class ApcEngine extends CacheEngine {
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/**
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* Initialize the Cache Engine
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*
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* Called automatically by the cache frontend
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* To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
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*
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* @param array $setting array of setting for the engine
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* @return boolean True if the engine has been successfully initialized, false if not
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* @see CacheEngine::__defaults
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* @access public
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*/
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function init($settings = array()) {
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parent::init(array_merge(array('engine' => 'Apc', 'prefix' => Inflector::slug(APP_DIR) . '_'), $settings));
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return function_exists('apc_cache_info');
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}
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/**
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* Write data for key into cache
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*
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* @param string $key Identifier for the data
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* @param mixed $value Data to be cached
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* @param integer $duration How long to cache the data, in seconds
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* @return boolean True if the data was succesfully cached, false on failure
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* @access public
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*/
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function write($key, &$value, $duration) {
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$expires = time() + $duration;
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apc_store($key.'_expires', $expires, $duration);
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return apc_store($key, $value, $duration);
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}
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/**
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* Read a key from the cache
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*
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* @param string $key Identifier for the data
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* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
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* @access public
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*/
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function read($key) {
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$time = time();
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$cachetime = intval(apc_fetch($key.'_expires'));
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if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) {
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return false;
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}
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return apc_fetch($key);
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}
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/**
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* Increments the value of an integer cached key
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*
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* @param string $key Identifier for the data
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* @param integer $offset How much to increment
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* @param integer $duration How long to cache the data, in seconds
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* @return New incremented value, false otherwise
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* @access public
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*/
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function increment($key, $offset = 1) {
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return apc_inc($key, $offset);
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}
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/**
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* Decrements the value of an integer cached key
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*
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* @param string $key Identifier for the data
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* @param integer $offset How much to substract
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* @param integer $duration How long to cache the data, in seconds
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* @return New decremented value, false otherwise
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* @access public
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*/
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function decrement($key, $offset = 1) {
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return apc_dec($key, $offset);
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}
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/**
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* Delete a key from the cache
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*
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* @param string $key Identifier for the data
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* @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
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* @access public
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*/
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function delete($key) {
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return apc_delete($key);
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}
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/**
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* Delete all keys from the cache
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*
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* @return boolean True if the cache was succesfully cleared, false otherwise
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* @access public
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*/
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function clear() {
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return apc_clear_cache('user');
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}
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}
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