/*
         * Called when the data message received from the node.
         * @param fromNode The node name that the message is sent from.
         * @param fromChannel The channel name that is raised event.
         * @param payloadType User defined message type
         * @param payload Array of payload.
         */
        @Override
        public void onDataReceived(
            String fromNode, String fromChannel, String payloadType, byte[][] payload) {
          Log.v(TAG, TAGClass + "onDataReceived()");

          if (!CHORD_APITEST_MESSAGE_TYPE.equals(payloadType)) return;

          byte[] buf = payload[0];
          if (null != mListener) mListener.onReceiveMessage(fromNode, fromChannel, new String(buf));
        }