docs: public int sendMessage(Message message)
      {
          BaseMessageHeader messageHeader = ((BaseMessage)message).getMessageHeader();
          String strQueueType = messageHeader.getQueueType();
          String strQueueName = messageHeader.getQueueName();
          MessageSender sender = this.getMessageQueue(strQueueName, strQueueType).getMessageSender();
          if (sender != null)
              sender.sendMessage(message);
          else
              return Constant.ERROR_RETURN;  // Queue doesn't exist
          return Constant.NORMAL_RETURN;
      }