public function commandList($queueName)
 {
     $instanceManagerModel = new StorkInstanceManagerModel($this->getEntityManager());
     $queueModel = new StorkQueueModel($this->getEntityManager());
     $queueId = $instanceManagerModel->getQueueId($queueName);
     if ($queueId !== NULL) {
         return $queueModel->getCommandInQueue($queueId);
     }
     return array();
 }