class CacheRouterRebuildSubscriber

class CacheRouterRebuildSubscriber implements EventSubscriberInterface {
    
    /**
     * {@inheritdoc}
     */
    public function onRouterFinished() {
        // Requested URLs that formerly gave a 403/404 may now be valid.
        // Also invalidate all cached routing as well as every HTTP response.
        Cache::invalidateTags([
            '4xx-response',
            'route_match',
            'http_response',
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getSubscribedEvents() : array {
        $events = [];
        // Act only when the router rebuild is finished.
        $events[RoutingEvents::FINISHED][] = [
            'onRouterFinished',
            200,
        ];
        return $events;
    }

}