コード例 #1
0
  /**
   * Sends enable or disable carbon packet to the server.
   *
   * @param enable if <tt>true</tt> sends enable packet otherwise sends disable packet.
   */
  private void enableDisableCarbon(final boolean enable) {
    IQ iq =
        new IQ() {

          @Override
          public String getChildElementXML() {
            return "<" + (enable ? "enable" : "disable") + " xmlns='urn:xmpp:carbons:2' />";
          }
        };

    Packet response = null;
    try {
      PacketCollector packetCollector =
          jabberProvider
              .getConnection()
              .createPacketCollector(new PacketIDFilter(iq.getPacketID()));
      iq.setFrom(jabberProvider.getOurJID());
      iq.setType(IQ.Type.SET);
      jabberProvider.getConnection().sendPacket(iq);
      response = packetCollector.nextResult(SmackConfiguration.getPacketReplyTimeout());

      packetCollector.cancel();
    } catch (Exception e) {
      logger.error("Failed to enable carbon.", e);
    }

    isCarbonEnabled = false;

    if (response == null) {
      logger.error("Failed to enable carbon. No response is received.");
    } else if (response.getError() != null) {
      logger.error("Failed to enable carbon: " + response.getError());
    } else if (!(response instanceof IQ) || !((IQ) response).getType().equals(IQ.Type.RESULT)) {
      logger.error("Failed to enable carbon. The response is not correct.");
    } else {
      isCarbonEnabled = true;
    }
  }