www.gusucode.com > 24Beta 虚拟主机版 1.0.0 Beta源码程序 > 24Beta 虚拟主机版 1.0.0 Beta源码程序/24Beta-1.0.0-vhost/library/framework/caching/CXCache.php
<?php /** * CXCache class file * * @author Wei Zhuo <weizhuo[at]gmail[dot]com> * @link http://www.yiiframework.com/ * @copyright Copyright © 2008-2009 Yii Software LLC * @license http://www.yiiframework.com/license/ */ /** * CXCache implements a cache application module based on {@link http://xcache.lighttpd.net/ xcache}. * * To use this application component, the XCache PHP extension must be loaded. * * See {@link CCache} manual for common cache operations that are supported by CXCache. * * @author Wei Zhuo <weizhuo[at]gmail[dot]com> * @version $Id: CXCache.php 1084 2009-06-02 17:35:38Z qiang.xue $ * @package system.caching * @since 1.0.1 */ class CXCache extends CCache { /** * Initializes this application component. * This method is required by the {@link IApplicationComponent} interface. * It checks the availability of memcache. * @throws CException if memcache extension is not loaded or is disabled. */ public function init() { parent::init(); if(!function_exists('xcache_isset')) throw new CException(Yii::t('yii','CXCache requires PHP XCache extension to be loaded.')); } /** * Retrieves a value from cache with a specified key. * This is the implementation of the method declared in the parent class. * @param string a unique key identifying the cached value * @return string the value stored in cache, false if the value is not in the cache or expired. */ protected function getValue($key) { return xcache_isset($key) ? xcache_get($key) : false; } /** * Stores a value identified by a key in cache. * This is the implementation of the method declared in the parent class. * * @param string the key identifying the value to be cached * @param string the value to be cached * @param integer the number of seconds in which the cached value will expire. 0 means never expire. * @return boolean true if the value is successfully stored into cache, false otherwise */ protected function setValue($key,$value,$expire) { return xcache_set($key,$value,$expire); } /** * Stores a value identified by a key into cache if the cache does not contain this key. * This is the implementation of the method declared in the parent class. * * @param string the key identifying the value to be cached * @param string the value to be cached * @param integer the number of seconds in which the cached value will expire. 0 means never expire. * @return boolean true if the value is successfully stored into cache, false otherwise */ protected function addValue($key,$value,$expire) { return !xcache_isset($key) ? $this->setValue($key,$value,$expire) : false; } /** * Deletes a value with the specified key from cache * This is the implementation of the method declared in the parent class. * @param string the key of the value to be deleted * @return boolean if no error happens during deletion */ protected function deleteValue($key) { return xcache_unset($key); } /** * Deletes all values from cache. * Be careful of performing this operation if the cache is shared by multiple applications. */ public function flush() { return xcache_clear_cache(); } }