<?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: ExtendedInterface.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Cache_Backend_Interface

 */

require_once 'Zend/Cache/Backend/Interface.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

 */

interface Zend_Cache_Backend_ExtendedInterface extends Zend_Cache_Backend_Interface

{

    /**

     * Return an array of stored cache ids

     *

     * @return array array of stored cache ids (string)

     */

    public function getIds();

    /**

     * Return an array of stored tags

     *

     * @return array array of stored tags (string)

     */

    public function getTags();

    /**

     * Return an array of stored cache ids which match given tags

     *

     * In case of multiple tags, a logical AND is made between tags

     *

     * @param array $tags array of tags

     * @return array array of matching cache ids (string)

     */

    public function getIdsMatchingTags($tags = array());

    /**

     * Return an array of stored cache ids which don't match given tags

     *

     * In case of multiple tags, a logical OR is made between tags

     *

     * @param array $tags array of tags

     * @return array array of not matching cache ids (string)

     */

    public function getIdsNotMatchingTags($tags = array());

    /**

     * Return an array of stored cache ids which match any given tags

     *

     * In case of multiple tags, a logical AND is made between tags

     *

     * @param array $tags array of tags

     * @return array array of any matching cache ids (string)

     */

    public function getIdsMatchingAnyTags($tags = array());

    /**

     * Return the filling percentage of the backend storage

     *

     * @return int integer between 0 and 100

     */

    public function getFillingPercentage();

    /**

     * Return an array of metadatas for the given cache id

     *

     * The array must include these keys :

     * - expire : the expire timestamp

     * - tags : a string array of tags

     * - mtime : timestamp of last modification time

     *

     * @param string $id cache id

     * @return array array of metadatas (false if the cache id is not found)

     */

    public function getMetadatas($id);

    /**

     * Give (if possible) an extra lifetime to the given cache id

     *

     * @param string $id cache id

     * @param int $extraLifetime

     * @return boolean true if ok

     */

    public function touch($id, $extraLifetime);

    /**

     * Return an associative array of capabilities (booleans) of the backend

     *

     * The array must include these keys :

     * - automatic_cleaning (is automating cleaning necessary)

     * - tags (are tags supported)

     * - expired_read (is it possible to read expired cache records

     *                 (for doNotTestCacheValidity option for example))

     * - priority does the backend deal with priority when saving

     * - infinite_lifetime (is infinite lifetime can work with this backend)

     * - get_list (is it possible to get the list of cache ids and the complete list of tags)

     *

     * @return array associative of with capabilities

     */

    public function getCapabilities();

}