class EventDataCollector

EventDataCollectorTest.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Tests/DataCollector/EventDataCollectorTest.php

class EventDataCollector extends DataCollector {
  private $dispatcher;
  public function setEventDispatcher(EventDispatcherInterface $dispatcher) {
    if ($dispatcher instanceof TraceableEventDispatcherInterface) {
      $this->dispatcher = $dispatcher;
    }
  }

  /**
   * {@inheritdoc}
   */
  public function collect(Request $request, Response $response, \Exception $exception = null) {
    $this->data = array(
      'called_listeners' => null !== $this->dispatcher ? $this->dispatcher
        ->getCalledListeners() : array(),
      'not_called_listeners' => null !== $this->dispatcher ? $this->dispatcher
        ->getNotCalledListeners() : array(),
    );
  }

  /**
   * Gets the called listeners.
   *
   * @return array An array of called listeners
   *
   * @see TraceableEventDispatcherInterface
   */
  public function getCalledListeners() {
    return $this->data['called_listeners'];
  }

  /**
   * Gets the not called listeners.
   *
   * @return array An array of not called listeners
   *
   * @see TraceableEventDispatcherInterface
   */
  public function getNotCalledListeners() {
    return $this->data['not_called_listeners'];
  }

  /**
   * {@inheritdoc}
   */
  public function getName() {
    return 'events';
  }

}