xcache.php

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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Session
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * XCache session storage handler
 *
 * @package     Joomla.Platform
 * @subpackage  Session
 * @since       11.1
 */
class JSessionStorageXcache extends JSessionStorage
{
        /**
         * Constructor
         *
         * @param   array  $options  Optional parameters.
         *
         * @since   11.1
         * @throws  RuntimeException
         */
        public function __construct($options = array())
        {
                if (!self::isSupported())
                {
                        throw new RuntimeException('XCache Extension is not available', 404);
                }

                parent::__construct($options);
        }

        /**
         * Read the data for a particular session identifier from the SessionHandler backend.
         *
         * @param   string  $id  The session identifier.
         *
         * @return  string  The session data.
         *
         * @since   11.1
         */
        public function read($id)
        {
                $sess_id = 'sess_' . $id;

                // Check if id exists
                if (!xcache_isset($sess_id))
                {
                        return;
                }

                return (string) xcache_get($sess_id);
        }

        /**
         * Write session data to the SessionHandler backend.
         *
         * @param   string  $id            The session identifier.
         * @param   string  $session_data  The session data.
         *
         * @return  boolean  True on success, false otherwise.
         *
         * @since   11.1
         */
        public function write($id, $session_data)
        {
                $sess_id = 'sess_' . $id;
                return xcache_set($sess_id, $session_data, ini_get("session.gc_maxlifetime"));
        }

        /**
         * Destroy the data for a particular session identifier in the SessionHandler backend.
         *
         * @param   string  $id  The session identifier.
         *
         * @return  boolean  True on success, false otherwise.
         *
         * @since   11.1
         */
        public function destroy($id)
        {
                $sess_id = 'sess_' . $id;

                if (!xcache_isset($sess_id))
                {
                        return true;
                }

                return xcache_unset($sess_id);
        }

        /**
         * Test to see if the SessionHandler is available.
         *
         * @return boolean  True on success, false otherwise.
         *
         * @since   12.1
         */
        static public function isSupported()
        {
                return (extension_loaded('xcache'));
        }
}