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Smack/source/org/jivesoftware/smack/GroupChat.java
Matt Tucker 7cc11fb96e Added getRoom method.
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@1975 b35dd754-fafc-0310-a699-88a17e54d16e
2003-06-20 02:18:34 +00:00

350 lines
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14 KiB
Java

/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright (C) 2002-2003 Jive Software. All rights reserved.
* ====================================================================
* The Jive Software License (based on Apache Software License, Version 1.1)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by
* Jive Software (http://www.jivesoftware.com)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Smack" and "Jive Software" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please
* contact webmaster@jivesoftware.com.
*
* 5. Products derived from this software may not be called "Smack",
* nor may "Smack" appear in their name, without prior written
* permission of Jive Software.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL JIVE SOFTWARE OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*/
package org.jivesoftware.smack;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.filter.*;
import java.util.*;
/**
* A GroupChat is a conversation that takes plaaces among many users in a virtual
* room. When joining a group chat, you specify a nickname, which is the identity
* that other chat room users see.
*
* @see XMPPConnection#createGroupChat(String)
* @author Matt Tucker
*/
public class GroupChat {
private XMPPConnection connection;
private String room;
private String nickname = null;
private boolean joined = false;
private List participants = new ArrayList();
private PacketFilter presenceFilter;
private PacketFilter messageFilter;
private PacketCollector messageCollector;
/**
* Creates a new group chat with the specified connection and room name. Note: no
* information is sent to or received from the server until you attempt to join the
* chat room. On some server implementations, the room will not be created until the
* first person joins it.
*
* @param connection the XMPP Connection.
* @param room the name of the room in the form "roomName@service", where
* "service" is the hostname at which the multi-user chat
* service is running.
*/
public GroupChat(XMPPConnection connection, String room) {
this.connection = connection;
this.room = room;
// Create a collector for all incoming messages.
messageFilter = new AndFilter(new FromContainsFilter(room),
new PacketTypeFilter(Message.class));
messageFilter = new AndFilter(messageFilter, new PacketFilter() {
public boolean accept(Packet packet) {
Message msg = (Message)packet;
return msg.getType() == Message.Type.GROUP_CHAT;
}
});
messageCollector = connection.createPacketCollector(messageFilter);
// Create a listener for all presence updates.
presenceFilter = new AndFilter(new FromContainsFilter(room),
new PacketTypeFilter(Presence.class));
connection.addPacketListener(new PacketListener() {
public void processPacket(Packet packet) {
Presence presence = (Presence)packet;
String from = presence.getFrom();
if (presence.getType() == Presence.Type.AVAILABLE) {
synchronized (participants) {
if (!participants.contains(from)) {
participants.add(from);
}
}
}
else if (presence.getType() == Presence.Type.UNAVAILABLE) {
synchronized (participants) {
participants.remove(from);
}
}
}
}, presenceFilter);
}
/**
* Returns the name of the room this GroupChat object represents.
*
* @return the groupchat room name.
*/
public String getRoom() {
return room;
}
/**
* Joins the chat room using the specified nickname. If already joined as
* another nickname, will leave as that name first before joining under the new
* name. The default timeout of 5 seconds for a reply from the group chat server
* that the join succeeded will be used.
*
* @param nickname the nicknam to use.
* @throws XMPPException if an error occurs joining the room.
*/
public synchronized void join(String nickname) throws XMPPException {
join(nickname, 5000);
}
/**
* Joins the chat room using the specified nickname. If already joined as
* another nickname, will leave as that name first before joining under the new
* name.
*
* @param nickname the nicknam to use.
* @param timeout the number of milleseconds to wait for a reply from the
* group chat that joining the room succeeded.
* @throws XMPPException if an error occurs joining the room.
*/
public synchronized void join(String nickname, long timeout) throws XMPPException {
if (nickname == null || nickname.equals("")) {
throw new IllegalArgumentException("Nickname must not be null or blank.");
}
// If we've already joined the room, leave it before joining under a new
// 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);
// Wait for a presence packet back from the server.
PacketFilter responseFilter = new AndFilter(
new FromContainsFilter(room + "/" + nickname),
new PacketTypeFilter(Presence.class));
PacketCollector response = connection.createPacketCollector(responseFilter);
// Send join packet.
connection.sendPacket(joinPresence);
// Wait up to five seconds for a reply.
Presence presence = (Presence)response.nextResult(5000);
if (presence == null) {
throw new XMPPException("No response from server.");
}
else if (presence.getError() != null) {
throw new XMPPException(presence.getError().getMessage());
}
this.nickname = nickname;
joined = true;
}
/**
* Leave the chat room.
*/
public synchronized void leave() {
// If not joined already, do nothing.
if (!joined) {
return;
}
// We leave a room by sending a presence packet where the "to"
// field is in the form "roomName@service/nickname"
Presence leavePresence = new Presence(Presence.Type.UNAVAILABLE);
leavePresence.setTo(room + "/" + nickname);
connection.sendPacket(leavePresence);
// Reset participant information.
participants = new ArrayList();
nickname = null;
joined = false;
}
/**
* Returns the nickname that was used to join the room, or <tt>null</tt> if not
* currently joined.
*
* @return the nickname currently being used.
*/
public String getNickname() {
return nickname;
}
/**
* Returns the number of participants in the group chat.<p>
*
* Note: this value will only be accurate after joining the group chat, and
* may fluctuate over time. If you query this value directly after joining the
* group chat it may not be accurate, as it takes a certain amount of time for
* the server to send all presence packets to this client.
*
* @return the number of participants in the group chat.
*/
public int getParticipantCount() {
synchronized (participants) {
return participants.size();
}
}
/**
* Returns an Iterator (of Strings) for the list of fully qualified participants
* in the group chat. For example, "conference@chat.jivesoftware.com/SomeUser".
* Typically, a client would only display the nickname of the participant. To
* get the nickname from the fully qualified name, use the
* {@link org.jivesoftware.smack.util.StringUtils#parseResource(String)} method.
* Note: this value will only be accurate after joining the group chat, and may
* fluctuate over time.
*
* @return an Iterator for the participants in the group chat.
*/
public Iterator getParticipants() {
synchronized (participants) {
return Collections.unmodifiableList(new ArrayList(participants)).iterator();
}
}
/**
* Adds a packet listener that will be notified of any new Presence packets
* sent to the group chat. Using a listener is a suitable way to know when the list
* of participants should be re-loaded due to any changes.
*
* @param listener a packet listener that will be notified of any presence packets
* sent to the group chat.
*/
public void addParticipantListener(PacketListener listener) {
connection.addPacketListener(listener, presenceFilter);
}
/**
* Sends a message to the chat room.
*
* @param text the text of the message to send.
* @throws XMPPException if sending the message fails.
*/
public void sendMessage(String text) throws XMPPException {
Message message = new Message(room, Message.Type.GROUP_CHAT);
message.setBody(text);
connection.sendPacket(message);
}
/**
* Creates a new Message to send to the chat room.
*
* @return a new Message addressed to the chat room.
*/
public Message createMessage() {
return new Message(room, Message.Type.GROUP_CHAT);
}
/**
* Sends a Message to the chat room.
*
* @param message the message.
* @throws XMPPException if sending the message fails.
*/
public void sendMessage(Message message) throws XMPPException {
connection.sendPacket(message);
}
/**
* Polls for and returns the next message, or <tt>null</tt> if there isn't
* a message immediately available. This method provides significantly different
* functionalty than the {@link #nextMessage()} method since it's non-blocking.
* In other words, the method call will always return immediately, whereas the
* nextMessage method will return only when a message is available (or after
* a specific timeout).
*
* @return the next message if one is immediately available and
* <tt>null</tt> otherwise.
*/
public Message pollMessage() {
return (Message)messageCollector.pollResult();
}
/**
* Returns the next available message in the chat. The method call will block
* (not return) until a message is available.
*
* @return the next message.
*/
public Message nextMessage() {
return (Message)messageCollector.nextResult();
}
/**
* Returns the next available message in the chat. The method call will block
* (not return) until a packet is available or the <tt>timeout</tt> has elapased.
* If the timeout elapses without a result, <tt>null</tt> will be returned.
*
* @param timeout the maximum amount of time to wait for the next message.
* @return the next message, or <tt>null</tt> if the timeout elapses without a
* message becoming available.
*/
public Message nextMessage(long timeout) {
return (Message)messageCollector.nextResult(timeout);
}
/**
* Adds a packet listener that will be notified of any new messages in the
* group chat. Only "group chat" messages addressed to this group chat will
* be delivered to the listener. If you wish to listen for other packets
* that may be associated with this group chat, you should register a
* PacketListener directly with the XMPPConnection with the appropriate
* PacketListener.
*
* @param listener a packet listener.
*/
public void addMessageListener(PacketListener listener) {
connection.addPacketListener(listener, messageFilter);
}
}