Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\HttpKernel\CacheWarmer;
Chris@0: 
Chris@0: /**
Chris@0:  * Interface for classes able to warm up the cache.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: interface CacheWarmerInterface extends WarmableInterface
Chris@0: {
Chris@0:     /**
Chris@0:      * Checks whether this warmer is optional or not.
Chris@0:      *
Chris@0:      * Optional warmers can be ignored on certain conditions.
Chris@0:      *
Chris@0:      * A warmer should return true if the cache can be
Chris@0:      * generated incrementally and on-demand.
Chris@0:      *
Chris@0:      * @return bool true if the warmer is optional, false otherwise
Chris@0:      */
Chris@0:     public function isOptional();
Chris@0: }