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<?php /** * @copyright (C) 2013 iJoomla, Inc. - All rights reserved. * @license GNU General Public License, version 2 (http://www.gnu.org/licenses/gpl-2.0.html) * @author iJoomla.com <webmaster@ijoomla.com> * @url https://www.jomsocial.com/license-agreement * The PHP code portions are distributed under the GPL license. If not otherwise stated, all images, manuals, cascading style sheets, and included JavaScript *are NOT GPL, and are released under the IJOOMLA Proprietary Use License v1.0 * More info at https://www.jomsocial.com/license-agreement */ defined('_JEXEC') or die('Restricted access'); jimport('joomla.cache.cache'); class CFastCache { private $_handler = null; private $_caching = false; /** * Constructor * */ public function __construct($handler) { $this->_handler = $handler; $this->_caching = extension_loaded('apc'); } /** * Generate unique cache id */ private function _getCacheId($id){ return 'jomsocial-'.md5($id); } /** * STore the cache */ public function store($data, $id, $group=null){ if(!$this->_caching) return; $cacheid = $this->_getCacheId($id); if(!is_null($group)){ // Store the id list in the group list $tags = apc_fetch('jomsocial-tags'); // If tags is missing, the whole cache might be invalid, clear it all if(!is_array($tags)){ apc_clear_cache('user'); $tags = array(); } foreach($group as $tag){ if(!isset($tags[$tag])){ $tags[$tag] = array(); } if(! in_array($cacheid, $tags[$tag]) ) $tags[$tag][] = $cacheid; } // Store this key back apc_store('jomsocial-tags', $tags, 0 ); } // Do not use any group return apc_store($cacheid, $data); } /** * Return the cache */ public function get($id){ if(!$this->_caching) return FALSE; $cacheid = $this->_getCacheId($id); // Do not use any group return apc_fetch($cacheid); } /** * Clean the cache. If group is specified, clean only the group */ public function clean($group=null, $mode='group'){ if(!$this->_caching) return; if(!is_null($group)){ $tags = apc_fetch('jomsocial-tags'); if(is_null($tags)){ apc_clear_cache('user'); $tags = array(); } // @todo: for each cache id, we should clear it from other tag list as well foreach($group as $tag){ if(!empty($tags[$tag])){ foreach($tags[$tag] as $id){ apc_delete($id); } } } } else { // Clear everything apc_clear_cache('user'); } return true; } }
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