public function RoutePreloader::onRequest in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Routing/RoutePreloader.php \Drupal\Core\Routing\RoutePreloader::onRequest()

Loads all non-admin routes right before the actual page is rendered.

Parameters

\Symfony\Component\HttpKernel\Event\KernelEvent $event: The event to process.

File

core/lib/Drupal/Core/Routing/RoutePreloader.php, line 72

Class

RoutePreloader

Defines a class which preloads non-admin routes.

Namespace

Drupal\Core\Routing

Code

public function onRequest(KernelEvent $event) {

  // Only preload on normal HTML pages, as they will display menu links.
  if ($this->routeProvider instanceof PreloadableRouteProviderInterface && $event
    ->getRequest()
    ->getRequestFormat() == 'html') {

    // Ensure that the state query is cached to skip the database query, if
    // possible.
    $key = 'routing.non_admin_routes';
    if ($cache = $this->cache
      ->get($key)) {
      $routes = $cache->data;
    }
    else {
      $routes = $this->state
        ->get($key, []);
      $this->cache
        ->set($key, $routes, Cache::PERMANENT, [
        'routes',
      ]);
    }
    if ($routes) {

      // Preload all the non-admin routes at once.
      $this->routeProvider
        ->preLoadRoutes($routes);
    }
  }
}