org.jivesoftware.smackx.packet.ChatStateExtension Java Examples

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Example #1
Source File: MultiUserChatStateManager.java    From saros with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Sets the current state of the provided chat. This method will send an empty bodied Message
 * packet with the state attached as a {@link org.jivesoftware.smack.packet.PacketExtension}, iff
 * the new chat state is different than the last state.
 *
 * @param newState the new state of the chat
 * @throws org.jivesoftware.smack.XMPPException when there is an error sending the message packet.
 */
public void setState(ChatState newState) throws XMPPException {
  if (muc == null || newState == null) {
    throw new IllegalArgumentException("Arguments cannot be null.");
  }

  // last and new ChatState are the same
  if (this.lastState == newState) {
    return;
  }

  /*
   * Creates a Message with an empty body. A body is needed because the
   * Message.Type.groupchat requires one.
   */
  try {
    Message message = muc.createMessage();
    message.setBody("");
    ChatStateExtension extension = new ChatStateExtension(newState);
    message.addExtension(extension);
    muc.sendMessage(message);
  } catch (Exception e1) {
    log.debug("Couldn't send state (" + e1.getMessage() + ")");
  }

  this.lastState = newState;
}