public function onKernelRequest(GetResponseEvent $event) {
		if (HttpKernel::MASTER_REQUEST != $event->getRequestType()) {
			return;
		}

		if ($event->getRequest()->headers->has('x-amz-sns-message-type')) {
			$result = $this->handleSnsNotifications($event);
			$event->setResponse(new Response($result, 200));
		}

		if ($event->getRequest()->headers->has('iron-message-id')) {
			$result = $this->handleIronMqNotifications($event);
			$event->setResponse(new Response($result, 200));
		}
	}