diff -r 000000000000 -r 7f95f8617b0b vendor/symfony/src/Symfony/Component/HttpKernel/HttpCache/StoreInterface.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/HttpKernel/HttpCache/StoreInterface.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,86 @@
+<?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;
+use Symfony\Component\HttpFoundation\HeaderBag;
+
+/**
+ *
+ *
+ * @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
+     */
+    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
+     */
+    function write(Request $request, Response $response);
+
+    /**
+     * Invalidates all cache entries that match the request.
+     *
+     * @param Request $request A Request instance
+     */
+    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
+     */
+    function lock(Request $request);
+
+    /**
+     * Releases the lock for the given Request.
+     *
+     * @param Request $request A Request instance
+     */
+    function unlock(Request $request);
+
+    /**
+     * Purges data for the given URL.
+     *
+     * @param string $url A URL
+     *
+     * @return Boolean true if the URL exists and has been purged, false otherwise
+     */
+    function purge($url);
+
+    /**
+     * Cleanups storage.
+     */
+    function cleanup();
+}