Examples with PacketInterceptor org.jivesoftware.smack.PacketInterceptor used on opensource projects

Example 6 with PacketInterceptor

use of org.jivesoftware.smack.PacketInterceptor in project ecf by eclipse.

the class MultiUserChat method join.

/**
 * Joins the chat room using the specified nickname and password. If already joined
 * using another nickname, this method will first leave the room and then
 * re-join using the new nickname.<p>
 *
 * To control the amount of history to receive while joining a room you will need to provide
 * a configured DiscussionHistory object.<p>
 *
 * A password is required when joining password protected rooms. If the room does
 * not require a password there is no need to provide one.<p>
 *
 * If the room does not already exist when the user seeks to enter it, the server will
 * decide to create a new room or not.
 *
 * @param nickname the nickname to use.
 * @param password the password to use.
 * @param history the amount of discussion history to receive while joining a room.
 * @param timeout the amount of time to wait for a reply from the MUC service(in milleseconds).
 * @throws XMPPException if an error occurs joining the room. In particular, a
 *      401 error can occur if no password was provided and one is required; or a
 *      403 error can occur if the user is banned; or a
 *      404 error can occur if the room does not exist or is locked; or a
 *      407 error can occur if user is not on the member list; or a
 *      409 error can occur if someone is already in the group chat with the same nickname.
 */
public synchronized void join(String nickname, String password, DiscussionHistory history, long timeout) throws XMPPException {
    if (nickname == null || nickname.equals("")) {
        throw new IllegalArgumentException("Nickname must not be null or blank.");
    }
    // nickname.
    if (joined) {
        leave();
    }
    // We join a room by sending a presence packet where the "to"
    // field is in the form "roomName@service/nickname"
    Presence joinPresence = new Presence(Presence.Type.available);
    joinPresence.setTo(room + "/" + nickname);
    // Indicate the the client supports MUC
    MUCInitialPresence mucInitialPresence = new MUCInitialPresence();
    if (password != null) {
        mucInitialPresence.setPassword(password);
    }
    if (history != null) {
        mucInitialPresence.setHistory(history.getMUCHistory());
    }
    joinPresence.addExtension(mucInitialPresence);
    // Invoke presence interceptors so that extra information can be dynamically added
    for (PacketInterceptor packetInterceptor : presenceInterceptors) {
        packetInterceptor.interceptPacket(joinPresence);
    }
    // Wait for a presence packet back from the server.
    PacketFilter responseFilter = new AndFilter(new FromMatchesFilter(room + "/" + nickname), new PacketTypeFilter(Presence.class));
    PacketCollector response = null;
    Presence presence;
    try {
        response = connection.createPacketCollector(responseFilter);
        // Send join packet.
        connection.sendPacket(joinPresence);
        // Wait up to a certain number of seconds for a reply.
        presence = (Presence) response.nextResult(timeout);
    } finally {
        // Stop queuing results
        if (response != null) {
            response.cancel();
        }
    }
    if (presence == null) {
        throw new XMPPException("No response from server.");
    } else if (presence.getError() != null) {
        throw new XMPPException(presence.getError());
    }
    this.nickname = nickname;
    joined = true;
    userHasJoined();
}