<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Cache

 * @subpackage Zend_Cache_Backend

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Disk.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/** @see Zend_Cache_Backend_Interface */

require_once 'Zend/Cache/Backend/Interface.php';

/** @see Zend_Cache_Backend_ZendServer */

require_once 'Zend/Cache/Backend/ZendServer.php';

/**

 * @package    Zend_Cache

 * @subpackage Zend_Cache_Backend

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Cache_Backend_ZendServer_Disk extends Zend_Cache_Backend_ZendServer implements Zend_Cache_Backend_Interface

{

    /**

     * Constructor

     *

     * @param  array $options associative array of options

     * @throws Zend_Cache_Exception

     */

    public function __construct(array $options = array())

    {

        if (!function_exists('zend_disk_cache_store')) {

            Zend_Cache::throwException('Zend_Cache_ZendServer_Disk backend has to be used within Zend Server environment.');

        }

        parent::__construct($options);

    }

    /**

     * Store data

     *

     * @param mixed  $data        Object to store

     * @param string $id          Cache id

     * @param int    $timeToLive  Time to live in seconds

     * @return boolean true if no problem

     */

    protected function _store($data, $id, $timeToLive)

    {

        if (zend_disk_cache_store($this->_options['namespace'] . '::' . $id,

                                  $data,

                                  $timeToLive) === false) {

            $this->_log('Store operation failed.');

            return false;

        }

        return true;

    }

    /**

     * Fetch data

     *

     * @param string $id          Cache id

     */

    protected function _fetch($id)

    {

        return zend_disk_cache_fetch($this->_options['namespace'] . '::' . $id);

    }

    /**

     * Unset data

     *

     * @param string $id          Cache id

     * @return boolean true if no problem

     */

    protected function _unset($id)

    {

        return zend_disk_cache_delete($this->_options['namespace'] . '::' . $id);

    }

    /**

     * Clear cache

     */

    protected function _clear()

    {

        zend_disk_cache_clear($this->_options['namespace']);

    }

}