--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel;
+
+/**
+ * Allows the Kernel to be rebooted using a temporary cache directory.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+interface RebootableInterface
+{
+ /**
+ * Reboots a kernel.
+ *
+ * The getCacheDir() method of a rebootable kernel should not be called
+ * while building the container. Use the %kernel.cache_dir% parameter instead.
+ *
+ * @param string|null $warmupDir pass null to reboot in the regular cache directory
+ */
+ public function reboot($warmupDir);
+}