/**
  * @param AMQPMessage $message
  *
  * @return AMQPMessage|null
  *
  * @throws \Exception
  */
 public function handle(AMQPMessage $message)
 {
     $request = $this->createRequest($message);
     if (!$message->has('reply_to')) {
         $this->endpoint->publish($request);
         return;
     }
     try {
         $response = $this->endpoint->call($request)->resolve();
     } catch (\Exception $e) {
         $response = new Response('', ['x-error' => $e->getMessage(), 'x-error-code' => $e->getCode()]);
     }
     $reply = $this->createReply($response);
     if ($message->has('correlation_id')) {
         $reply->set('correlation_id', $message->get('correlation_id'));
     }
     return $reply;
 }