aleph1.co.uk Git - yaffs-website/blob - web/core/lib/Drupal/Core/EventSubscriber/CacheRouterRebuildSubscriber.php

   1 <?php
   2
   3 namespace Drupal\Core\EventSubscriber;
   4
   5 use Drupal\Core\Cache\Cache;
   6 use Drupal\Core\Routing\RoutingEvents;
   7 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
   8
   9 /**
  10  * Clear cache tags when the router is rebuilt.
  11  */
  12 class CacheRouterRebuildSubscriber implements EventSubscriberInterface {
  13
  14   /**
  15    * {@inheritdoc}
  16    */
  17   public function onRouterFinished() {
  18     // Requested URLs that formerly gave a 403/404 may now be valid.
  19     // Also invalidate all cached routing as well as every HTTP response.
  20     Cache::invalidateTags(['4xx-response', 'route_match', 'http_response']);
  21   }
  22
  23   /**
  24    * {@inheritdoc}
  25    */
  26   public static function getSubscribedEvents() {
  27     $events = [];
  28     // Act only when the router rebuild is finished.
  29     $events[RoutingEvents::FINISHED][] = ['onRouterFinished', 200];
  30     return $events;
  31   }
  32
  33 }