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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * This code is partially based on the Rack-Cache library by Ryan Tomayko, * which is released under the MIT license. * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\HttpKernel\HttpCache; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\HttpFoundation\Response; /** * Interface implemented by HTTP cache stores. * * @author Fabien Potencier <fabien@symfony.com> */ interface StoreInterface { /** * Locates a cached Response for the Request provided. * * @param Request $request A Request instance * * @return Response|null A Response instance, or null if no cache entry was found */ public function lookup(Request $request); /** * Writes a cache entry to the store for the given Request and Response. * * Existing entries are read and any that match the response are removed. This * method calls write with the new list of cache entries. * * @param Request $request A Request instance * @param Response $response A Response instance * * @return string The key under which the response is stored */ public function write(Request $request, Response $response); /** * Invalidates all cache entries that match the request. * * @param Request $request A Request instance */ public function invalidate(Request $request); /** * Locks the cache for a given Request. * * @param Request $request A Request instance * * @return Boolean|string true if the lock is acquired, the path to the current lock otherwise */ public function lock(Request $request); /** * Releases the lock for the given Request. * * @param Request $request A Request instance * * @return Boolean False if the lock file does not exist or cannot be unlocked, true otherwise */ public function unlock(Request $request); /** * Returns whether or not a lock exists. * * @param Request $request A Request instance * * @return Boolean true if lock exists, false otherwise */ public function isLocked(Request $request); /** * Purges data for the given URL. * * @param string $url A URL * * @return Boolean true if the URL exists and has been purged, false otherwise */ public function purge($url); /** * Cleanups storage. */ public function cleanup(); }