Run KernelEvents::REQUEST event before hook_node_access?

Question

I'm doing some central static variable setup for the request and was hoping to use KernelEvents::REQUEST to run first and set the variables.

However, I've found that while the documentation states:

The REQUEST event occurs at the very beginning of request dispatching.

hook_node_access actually runs before the KernelEvents::REQUEST event handler:

  /**
   * The subscribed events.
   */
  public static function getSubscribedEvents() {
    $events = [];
    $events[KernelEvents::REQUEST][] = ['onKernelRequest', 1];
    return $events;
  }

then in the event listener:

  public function onKernelRequest(GetResponseEvent $event) {
    drupal_set_message(__FUNCTION__ . ': ' . microtime());
  }

and in hook_node_access

then in the event listener:

  public function mymodule_node_accesss(NodeInterface $node, $op, AccountInterface $account) {
    drupal_set_message(__FUNCTION__ . ': ' . microtime());
  }

Output:

mymodule_node_access: 0.76379200 1518995630
onKernelRequest: 0.77758400 1518995630

As we can see from microtime order, hook_node_access runs first. Anyway to make it run after the KernelEvents::REQUEST event handler? thanks.

Answer 1

OK, after a bit more digging, I found the solution.

The "weight" param for ['onKernelRequest', 1] is sort DESC, so the higher weight number will run first.

Adjusting the event listener with weight 1000 as follows means it runs before the hook_node_access invoking listener

  /**
   * The subscribed events.
   */
  public static function getSubscribedEvents() {
    $events = [];
    $events[KernelEvents::REQUEST][] = ['onKernelRequest', 1000];
    return $events;
  }