<?php/** * @version		$Id: apc.php 10707 2008-08-21 09:52:47Z eddieajau $ * @package		Joomla.Framework * @subpackage	Cache * @copyright	Copyright (C) 2005 - 2008 Open Source Matters. All rights reserved. * @license		GNU/GPL, see LICENSE.php * Joomla! is free software. This version may have been modified pursuant * to the GNU General Public License, and as distributed it includes or * is derivative of works licensed under the GNU General Public License or * other free or open source software licenses. * See COPYRIGHT.php for copyright notices and details. */// Check to ensure this file is within the rest of the frameworkdefined('JPATH_BASE') or die();/** * APC cache storage handler * * @package		Joomla.Framework * @subpackage	Cache * @since		1.5 */class JCacheStorageApc extends JCacheStorage{	/**	 * Constructor	 *	 * @access protected	 * @param array $options optional parameters	 */	function __construct( $options = array() )	{		parent::__construct($options);		$config			=& JFactory::getConfig();		$this->_hash	= $config->getValue('config.secret');	}	/**	 * Get cached data from APC by id and group	 *	 * @access	public	 * @param	string	$id			The cache data id	 * @param	string	$group		The cache data group	 * @param	boolean	$checkTime	True to verify cache time expiration threshold	 * @return	mixed	Boolean false on failure or a cached data string	 * @since	1.5	 */	function get($id, $group, $checkTime)	{		$cache_id = $this->_getCacheId($id, $group);		$this->_setExpire($cache_id);		return apc_fetch($cache_id);	}	/**	 * Store the data to APC by id and group	 *	 * @access	public	 * @param	string	$id		The cache data id	 * @param	string	$group	The cache data group	 * @param	string	$data	The data to store in cache	 * @return	boolean	True on success, false otherwise	 * @since	1.5	 */	function store($id, $group, $data)	{		$cache_id = $this->_getCacheId($id, $group);		apc_store($cache_id.'_expire', time());		return apc_store($cache_id, $data, $this->_lifetime);	}	/**	 * Remove a cached data entry by id and group	 *	 * @access	public	 * @param	string	$id		The cache data id	 * @param	string	$group	The cache data group	 * @return	boolean	True on success, false otherwise	 * @since	1.5	 */	function remove($id, $group)	{		$cache_id = $this->_getCacheId($id, $group);		apc_delete($cache_id.'_expire');		return apc_delete($cache_id);	}	/**	 * Clean cache for a group given a mode.	 *	 * group mode		: cleans all cache in the group	 * notgroup mode	: cleans all cache not in the group	 *	 * @access	public	 * @param	string	$group	The cache data group	 * @param	string	$mode	The mode for cleaning cache [group|notgroup]	 * @return	boolean	True on success, false otherwise	 * @since	1.5	 */	function clean($group, $mode)	{		return true;	}	/**	 * Test to see if the cache storage is available.	 *	 * @static	 * @access public	 * @return boolean  True on success, false otherwise.	 */	function test()	{		return extension_loaded('apc');	}	/**	 * Set expire time on each call since memcache sets it on cache creation.	 *	 * @access private	 *	 * @param string  $key   Cache key to expire.	 * @param integer $lifetime  Lifetime of the data in seconds.	 */	function _setExpire($key)	{		$lifetime	= $this->_lifetime;		$expire		= apc_fetch($key.'_expire');		// set prune period		if ($expire + $lifetime < time()) {			apc_delete($key);			apc_delete($key.'_expire');		} else {			apc_store($key.'_expire',  time());		}	}	/**	 * Get a cache_id string from an id/group pair	 *	 * @access	private	 * @param	string	$id		The cache data id	 * @param	string	$group	The cache data group	 * @return	string	The cache_id string	 * @since	1.5	 */	function _getCacheId($id, $group)	{		$name	= md5($this->_application.'-'.$id.'-'.$this->_hash.'-'.$this->_language);		return 'cache_'.$group.'-'.$name;	}}