/**
  * Tries to get the result for given result ID from RabbitMQ.
  *
  * @throws        AMQPTimeoutException
  * @param         string $resultId The UUID of the result to getc
  * @param         int    $timeout  Timeout in seconds after which the fetching shall stop
  * @returns       string           JSON encoded data string
  */
 public function getResult($resultId, $timeout = null)
 {
     if (is_null($timeout)) {
         $timeout = $this->timeout;
     }
     $hashId = Common::getHash($resultId, $this->amqNumQueues);
     $resultQueue = $this->getResultQueue($hashId);
     $this->waitId = $resultId;
     Common::$lg->addDebug(sprintf("Client waiting for request %s during %ds on %s (exchange %s)", $resultId, $timeout, $resultQueue, $this->resultExchange));
     $this->resultChannel->basic_consume($resultQueue, '', false, false, false, false, array($this, 'onResult'));
     while (!$this->response) {
         try {
             $this->resultChannel->wait(null, false, $timeout);
         } catch (AMQPTimeoutException $e) {
             Common::$lg->addCritical("Client hit the fan after {$timeout}s");
             throw $e;
         }
     }
     $res = json_decode($this->response);
     $data = $res->{'data'};
     $this->response = null;
     return $data;
 }
 /**
  * Puts a result on a RabbitMQ queue over AMQP.
  *
  * Puts the data for the given result ID (UUID, version 4) on RabbitMQ
  * queue.
  *
  * @param         string $resultId The UUID of the result to put
  * @param         string $data Data to submit
  * @returns       void
  */
 public function putResult($resultId, $data)
 {
     $routingKey = $resultId;
     $hashId = Common::getHash($routingKey, $this->amqNumQueues);
     $resultQueue = $this->getResultQueue($hashId);
     $body = array('result_id' => $resultId, 'data' => $data);
     $serializedBody = json_encode($body);
     $message = new AMQPMessage($serializedBody, array('content_type' => Constants\AMQ::CONTENT_TYPE, 'content_encoding' => $this->msgEncoding, 'delivery_mode' => Constants\AMQ::DELIVERY_MODE, 'correlation_id' => $hashId));
     $this->resultChannel->basic_publish($message, $this->resultExchange, $hashId);
     Common::$lg->addDebug("Server published result {$resultId} within {$resultQueue} -> {$this->resultExchange}");
 }