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Initial version. SMACK-155

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git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@4537 b35dd754-fafc-0310-a699-88a17e54d16e
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Gaston Dombiak 2006-07-18 05:04:47 +00:00 committed by gato
parent 494cec8f9a
commit 14b50d790a
3 changed files with 446 additions and 0 deletions
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135
source/org/jivesoftware/smackx/muc/ConnectionDetachedPacketCollector.java Normal file
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/**
* $RCSfile$
* $Revision: 2779 $
* $Date: 2005-09-05 17:00:45 -0300 (Mon, 05 Sep 2005) $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.muc;
import org.jivesoftware.smack.packet.Packet;
import java.util.LinkedList;
/**
* A variant of the {@link org.jivesoftware.smack.PacketCollector} class
* that does not force attachment to an <code>XMPPConnection</code>
* on creation and no filter is required. Used to collect message
* packets targeted to a group chat room.
*
* @author Larry Kirschner
*/
class ConnectionDetachedPacketCollector {
/**
* Max number of packets that any one collector can hold. After the max is
* reached, older packets will be automatically dropped from the queue as
* new packets are added.
*/
private static final int MAX_PACKETS = 65536;
private LinkedList<Packet> resultQueue;
/**
* Creates a new packet collector. If the packet filter is <tt>null</tt>, then
* all packets will match this collector.
*/
public ConnectionDetachedPacketCollector() {
this.resultQueue = new LinkedList<Packet>();
}
/**
* Polls to see if a packet is currently available and returns it, or
* immediately returns <tt>null</tt> if no packets are currently in the
* result queue.
*
* @return the next packet result, or <tt>null</tt> if there are no more
* results.
*/
public synchronized Packet pollResult() {
if (resultQueue.isEmpty()) {
return null;
}
else {
return resultQueue.removeLast();
}
}
/**
* Returns the next available packet. The method call will block (not return)
* until a packet is available.
*
* @return the next available packet.
*/
public synchronized Packet nextResult() {
// Wait indefinitely until there is a result to return.
while (resultQueue.isEmpty()) {
try {
wait();
}
catch (InterruptedException ie) {
// Ignore.
}
}
return resultQueue.removeLast();
}
/**
* Returns the next available packet. 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 amount of time to wait for the next packet (in milleseconds).
* @return the next available packet.
*/
public synchronized Packet nextResult(long timeout) {
// Wait up to the specified amount of time for a result.
if (resultQueue.isEmpty()) {
try {
wait(timeout);
}
catch (InterruptedException ie) {
// Ignore.
}
}
// If still no result, return null.
if (resultQueue.isEmpty()) {
return null;
}
else {
return resultQueue.removeLast();
}
}
/**
* Processes a packet to see if it meets the criteria for this packet collector.
* If so, the packet is added to the result queue.
*
* @param packet the packet to process.
*/
protected synchronized void processPacket(Packet packet) {
if (packet == null) {
return;
}
// If the max number of packets has been reached, remove the oldest one.
if (resultQueue.size() == MAX_PACKETS) {
resultQueue.removeLast();
}
// Add the new packet.
resultQueue.addFirst(packet);
// Notify waiting threads a result is available.
notifyAll();
}
}

96
source/org/jivesoftware/smackx/muc/PacketMultiplexListener.java Normal file
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/**
* $RCSfile$
* $Revision: 2779 $
* $Date: 2005-09-05 17:00:45 -0300 (Mon, 05 Sep 2005) $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.muc;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.filter.MessageTypeFilter;
import org.jivesoftware.smack.filter.PacketExtensionFilter;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.filter.PacketTypeFilter;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.Presence;
/**
* The single <code>PacketListener</code> used by each {@link MultiplexedMultiUserChat}
* for all basic processing of presence, and message packets targeted to that chat.
*
* @author Larry Kirschner
*/
class PacketMultiplexListener implements PacketListener {
private static final PacketFilter MESSAGE_FILTER =
new MessageTypeFilter(Message.Type.GROUP_CHAT);
private static final PacketFilter PRESENCE_FILTER = new PacketTypeFilter(Presence.class);
private static final PacketFilter SUBJECT_FILTER = new PacketFilter() {
public boolean accept(Packet packet) {
Message msg = (Message) packet;
return msg.getSubject() != null;
}
};
private static final PacketFilter DECLINES_FILTER =
new PacketExtensionFilter("x",
"http://jabber.org/protocol/muc#user");
private ConnectionDetachedPacketCollector messageCollector;
private PacketListener presenceListener;
private PacketListener subjectListener;
private PacketListener declinesListener;
public PacketMultiplexListener(
ConnectionDetachedPacketCollector messageCollector,
PacketListener presenceListener,
PacketListener subjectListener, PacketListener declinesListener) {
if (messageCollector == null) {
throw new IllegalArgumentException("MessageCollector is null");
}
if (presenceListener == null) {
throw new IllegalArgumentException("Presence listener is null");
}
if (subjectListener == null) {
throw new IllegalArgumentException("Subject listener is null");
}
if (declinesListener == null) {
throw new IllegalArgumentException("Declines listener is null");
}
this.messageCollector = messageCollector;
this.presenceListener = presenceListener;
this.subjectListener = subjectListener;
this.declinesListener = declinesListener;
}
public void processPacket(Packet p) {
if (PRESENCE_FILTER.accept(p)) {
presenceListener.processPacket(p);
}
else if (MESSAGE_FILTER.accept(p)) {
messageCollector.processPacket(p);
if (SUBJECT_FILTER.accept(p)) {
subjectListener.processPacket(p);
}
}
else if (DECLINES_FILTER.accept(p)) {
declinesListener.processPacket(p);
}
}
}

215
source/org/jivesoftware/smackx/muc/RoomListenerMultiplexor.java Normal file
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/**
* $RCSfile$
* $Revision: 2779 $
* $Date: 2005-09-05 17:00:45 -0300 (Mon, 05 Sep 2005) $
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.muc;
import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.util.StringUtils;
import java.lang.ref.WeakReference;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
/**
* A <code>RoomListenerMultiplexor</code> multiplexes incoming packets on
* an <code>XMPPConnection</code> using a single listener/filter pair.
* A single <code>RoomListenerMultiplexor</code> is created for each
* {@link org.jivesoftware.smack.XMPPConnection} that has joined MUC rooms
* within its session.
*
* @author Larry Kirschner
*/
class RoomListenerMultiplexor implements ConnectionListener {
// We use a WeakHashMap so that the GC can collect the monitor when the
// connection is no longer referenced by any object.
private static final Map<XMPPConnection, WeakReference<RoomListenerMultiplexor>> monitors =
new WeakHashMap<XMPPConnection, WeakReference<RoomListenerMultiplexor>>();
private XMPPConnection connection;
private RoomMultiplexFilter filter;
private RoomMultiplexListener listener;
/**
* Returns a new or existing RoomListenerMultiplexor for a given connection.
*
* @param conn the connection to monitor for room invitations.
* @return a new or existing RoomListenerMultiplexor for a given connection.
*/
public static RoomListenerMultiplexor getRoomMultiplexor(XMPPConnection conn) {
synchronized (monitors) {
if (!monitors.containsKey(conn)) {
RoomListenerMultiplexor rm = new RoomListenerMultiplexor(conn, new RoomMultiplexFilter(),
new RoomMultiplexListener());
rm.init();
// We need to use a WeakReference because the monitor references the
// connection and this could prevent the GC from collecting the monitor
// when no other object references the monitor
monitors.put(conn, new WeakReference<RoomListenerMultiplexor>(rm));
}
// Return the InvitationsMonitor that monitors the connection
return monitors.get(conn).get();
}
}
/**
* All access should be through
* the static method {@link #getRoomMultiplexor(XMPPConnection)}.
*/
private RoomListenerMultiplexor(XMPPConnection connection, RoomMultiplexFilter filter,
RoomMultiplexListener listener) {
if (connection == null) {
throw new IllegalArgumentException("Connection is null");
}
if (filter == null) {
throw new IllegalArgumentException("Filter is null");
}
if (listener == null) {
throw new IllegalArgumentException("Listener is null");
}
this.connection = connection;
this.filter = filter;
this.listener = listener;
}
public void addRoom(String address, PacketMultiplexListener roomListener) {
filter.addRoom(address);
listener.addRoom(address, roomListener);
}
public void connectionClosed() {
cancel();
}
public void connectionClosedOnError(Exception e) {
cancel();
}
/**
* Initializes the listeners to detect received room invitations and to detect when the
* connection gets closed. As soon as a room invitation is received the invitations
* listeners will be fired. When the connection gets closed the monitor will remove
* his listeners on the connection.
*/
public void init() {
connection.addConnectionListener(this);
connection.addPacketListener(listener, filter);
}
public void removeRoom(String address) {
filter.removeRoom(address);
listener.removeRoom(address);
}
/**
* Cancels all the listeners that this InvitationsMonitor has added to the connection.
*/
private void cancel() {
connection.removeConnectionListener(this);
connection.removePacketListener(listener);
}
/**
* The single <code>XMPPConnection</code>-level <code>PacketFilter</code> used by a {@link RoomListenerMultiplexor}
* for all muc chat rooms on an <code>XMPPConnection</code>.
* Each time a muc chat room is added to/removed from an
* <code>XMPPConnection</code> the address for that chat room
* is added to/removed from that <code>XMPPConnection</code>'s
* <code>RoomMultiplexFilter</code>.
*/
private static class RoomMultiplexFilter implements PacketFilter {
private Map<String, String> roomAddressTable = new ConcurrentHashMap<String, String>();
public boolean accept(Packet p) {
String from = p.getFrom();
if (from == null) {
return false;
}
return roomAddressTable.containsKey(StringUtils.parseBareAddress(from).toLowerCase());
}
public void addRoom(String address) {
if (address == null) {
return;
}
roomAddressTable.put(address.toLowerCase(), address);
}
public void removeRoom(String address) {
if (address == null) {
return;
}
roomAddressTable.remove(address.toLowerCase());
}
}
/**
* The single <code>XMPPConnection</code>-level <code>PacketListener</code>
* used by a {@link RoomListenerMultiplexor}
* for all muc chat rooms on an <code>XMPPConnection</code>.
* Each time a muc chat room is added to/removed from an
* <code>XMPPConnection</code> the address and listener for that chat room
* are added to/removed from that <code>XMPPConnection</code>'s
* <code>RoomMultiplexListener</code>.
*
* @author Larry Kirschner
*/
private static class RoomMultiplexListener implements PacketListener {
private Map<String, PacketMultiplexListener> roomListenersByAddress =
new ConcurrentHashMap<String, PacketMultiplexListener>();
public void processPacket(Packet p) {
String from = p.getFrom();
if (from == null) {
return;
}
PacketMultiplexListener listener =
roomListenersByAddress.get(StringUtils.parseBareAddress(from).toLowerCase());
if (listener != null) {
listener.processPacket(p);
}
}
public void addRoom(String address, PacketMultiplexListener listener) {
if (address == null) {
return;
}
roomListenersByAddress.put(address.toLowerCase(), listener);
}
public void removeRoom(String address) {
if (address == null) {
return;
}
roomListenersByAddress.remove(address.toLowerCase());
}
}
}