class RoutingEvents

final class RoutingEvents {
    
    /**
     * Name of the event fired during route collection to allow new routes.
     *
     * This event is used to add new routes based upon existing routes, giving
     * modules the opportunity to dynamically generate additional routes. The
     * event listener method receives a \Drupal\Core\Routing\RouteBuildEvent
     * instance.
     *
     * @Event
     *
     * @see \Drupal\Core\Routing\RouteBuildEvent
     * @see \Drupal\Core\EventSubscriber\EntityRouteProviderSubscriber
     * @see \Drupal\Core\Routing\RouteBuilder::rebuild()
     *
     * @var string
     */
    const DYNAMIC = 'routing.route_dynamic';
    
    /**
     * Name of the event fired during route collection to allow changes to routes.
     *
     * This event is used to process new routes before they get saved, giving
     * modules the opportunity to alter routes provided by any other module. The
     * event listener method receives a \Drupal\Core\Routing\RouteBuildEvent
     * instance.
     *
     * @Event
     *
     * @see \Symfony\Component\Routing\RouteCollection
     * @see \Drupal\system\EventSubscriber\AdminRouteSubscriber
     * @see \Drupal\Core\Routing\RouteBuilder::rebuild()
     *
     * @var string
     */
    const ALTER = 'routing.route_alter';
    
    /**
     * Name of the event fired to indicate route building has ended.
     *
     * This event gives modules the opportunity to perform some action after route
     * building has completed. The event listener receives a
     * \Drupal\Component\EventDispatcher\Event instance.
     *
     * @Event
     *
     * @see \Drupal\Component\EventDispatcher\Event
     * @see \Drupal\Core\EventSubscriber\MenuRouterRebuildSubscriber
     * @see \Drupal\Core\Routing\RouteBuilder::rebuild()
     *
     * @var string
     */
    const FINISHED = 'routing.route_finished';

}