<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\Cache;

/**
* Interface of a cache frontend - an ultimate publicly available interface to an actual cache storage
*
* @api
* @since 100.0.2
*/
interface FrontendInterface
{
/**
* Test if a cache is available for the given id
*
* @param string $identifier Cache id
* @return int|bool Last modified time of cache entry if it is available, false otherwise
*/
public function test($identifier);

/**
* Load cache record by its unique identifier
*
* @param string $identifier
* @return string|bool
* @api
*/
public function load($identifier);

/**
* Save cache record
*
* @param string $data
* @param string $identifier
* @param array $tags
* @param int|bool|null $lifeTime
* @return bool
* @api
*/
public function save($data, $identifier, array $tags = [], $lifeTime = null);

/**
* Remove cache record by its unique identifier
*
* @param string $identifier
* @return bool
* @api
*/
public function remove($identifier);

/**
* Clean cache records matching specified tags
*
* @param string $mode
* @param array $tags
* @return bool
* @api
*/
public function clean($mode = \Zend_Cache::CLEANING_MODE_ALL, array $tags = []);

/**
* Retrieve backend instance
*
* @return \Zend_Cache_Backend_Interface
*/
public function getBackend();

/**
* Retrieve frontend instance compatible with Zend Locale Data setCache() to be used as a workaround
*
* @return \Zend_Cache_Core
*/
public function getLowLevelFrontend();
}