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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\EventSubscriber\KernelDestructionSubscriber. | |
| */ | |
| namespace Drupal\Core\EventSubscriber; | |
| use Symfony\Component\DependencyInjection\ContainerAwareInterface; | |
| use Symfony\Component\DependencyInjection\ContainerAwareTrait; | |
| use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
| use Symfony\Component\HttpKernel\Event\PostResponseEvent; | |
| use Symfony\Component\HttpKernel\KernelEvents; | |
| /** | |
| * Destructs services that are initiated and tagged with "needs_destruction". | |
| * | |
| * @see \Drupal\Core\DestructableInterface | |
| */ | |
| class KernelDestructionSubscriber implements EventSubscriberInterface, ContainerAwareInterface { | |
| use ContainerAwareTrait; | |
| /** | |
| * Holds an array of service ID's that will require destruction. | |
| * | |
| * @var array | |
| */ | |
| protected $services = array(); | |
| /** | |
| * Registers a service for destruction. | |
| * | |
| * Calls to this method are set up in | |
| * RegisterServicesForDestructionPass::process(). | |
| * | |
| * @param string $id | |
| * Name of the service. | |
| */ | |
| public function registerService($id) { | |
| $this->services[] = $id; | |
| } | |
| /** | |
| * Invoked by the terminate kernel event. | |
| * | |
| * @param \Symfony\Component\HttpKernel\Event\PostResponseEvent $event | |
| * The event object. | |
| */ | |
| public function onKernelTerminate(PostResponseEvent $event) { | |
| foreach ($this->services as $id) { | |
| // Check if the service was initialized during this request, destruction | |
| // is not necessary if the service was not used. | |
| if ($this->container->initialized($id)) { | |
| $service = $this->container->get($id); | |
| $service->destruct(); | |
| } | |
| } | |
| } | |
| /** | |
| * Registers the methods in this class that should be listeners. | |
| * | |
| * @return array | |
| * An array of event listener definitions. | |
| */ | |
| static function getSubscribedEvents() { | |
| $events[KernelEvents::TERMINATE][] = array('onKernelTerminate', 100); | |
| return $events; | |
| } | |
| } |