Initial version. SMACK-155
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@4537 b35dd754-fafc-0310-a699-88a17e54d16e
This commit is contained in:
Gaston Dombiak
gato
parent
494cec8f9a
commit
14b50d790a
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/**
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* $RCSfile$
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* $Revision: 2779 $
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* $Date: 2005-09-05 17:00:45 -0300 (Mon, 05 Sep 2005) $
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*
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* Copyright 2003-2006 Jive Software.
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.muc;
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import org.jivesoftware.smack.packet.Packet;
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import java.util.LinkedList;
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/**
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* A variant of the {@link org.jivesoftware.smack.PacketCollector} class
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* that does not force attachment to an <code>XMPPConnection</code>
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* on creation and no filter is required. Used to collect message
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* packets targeted to a group chat room.
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*
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* @author Larry Kirschner
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*/
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class ConnectionDetachedPacketCollector {
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/**
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* Max number of packets that any one collector can hold. After the max is
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* reached, older packets will be automatically dropped from the queue as
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* new packets are added.
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*/
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private static final int MAX_PACKETS = 65536;
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private LinkedList<Packet> resultQueue;
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/**
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* Creates a new packet collector. If the packet filter is <tt>null</tt>, then
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* all packets will match this collector.
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*/
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public ConnectionDetachedPacketCollector() {
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this.resultQueue = new LinkedList<Packet>();
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}
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/**
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* Polls to see if a packet is currently available and returns it, or
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* immediately returns <tt>null</tt> if no packets are currently in the
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* result queue.
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*
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* @return the next packet result, or <tt>null</tt> if there are no more
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* results.
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*/
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public synchronized Packet pollResult() {
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if (resultQueue.isEmpty()) {
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return null;
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}
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else {
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return resultQueue.removeLast();
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}
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}
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/**
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* Returns the next available packet. The method call will block (not return)
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* until a packet is available.
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*
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* @return the next available packet.
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*/
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public synchronized Packet nextResult() {
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// Wait indefinitely until there is a result to return.
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while (resultQueue.isEmpty()) {
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try {
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wait();
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}
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catch (InterruptedException ie) {
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// Ignore.
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}
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}
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return resultQueue.removeLast();
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}
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/**
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* Returns the next available packet. The method call will block (not return)
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* until a packet is available or the <tt>timeout</tt> has elapased. If the
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* timeout elapses without a result, <tt>null</tt> will be returned.
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*
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* @param timeout the amount of time to wait for the next packet (in milleseconds).
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* @return the next available packet.
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*/
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public synchronized Packet nextResult(long timeout) {
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// Wait up to the specified amount of time for a result.
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if (resultQueue.isEmpty()) {
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try {
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wait(timeout);
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}
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catch (InterruptedException ie) {
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// Ignore.
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}
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}
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// If still no result, return null.
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if (resultQueue.isEmpty()) {
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return null;
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}
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else {
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return resultQueue.removeLast();
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}
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}
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/**
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* Processes a packet to see if it meets the criteria for this packet collector.
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* If so, the packet is added to the result queue.
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*
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* @param packet the packet to process.
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*/
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protected synchronized void processPacket(Packet packet) {
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if (packet == null) {
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return;
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}
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// If the max number of packets has been reached, remove the oldest one.
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if (resultQueue.size() == MAX_PACKETS) {
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resultQueue.removeLast();
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}
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// Add the new packet.
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resultQueue.addFirst(packet);
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// Notify waiting threads a result is available.
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notifyAll();
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}
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}
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/**
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* $RCSfile$
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* $Revision: 2779 $
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* $Date: 2005-09-05 17:00:45 -0300 (Mon, 05 Sep 2005) $
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*
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* Copyright 2003-2006 Jive Software.
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.muc;
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import org.jivesoftware.smack.PacketListener;
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import org.jivesoftware.smack.filter.MessageTypeFilter;
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import org.jivesoftware.smack.filter.PacketExtensionFilter;
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import org.jivesoftware.smack.filter.PacketFilter;
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import org.jivesoftware.smack.filter.PacketTypeFilter;
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import org.jivesoftware.smack.packet.Message;
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import org.jivesoftware.smack.packet.Packet;
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import org.jivesoftware.smack.packet.Presence;
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/**
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* The single <code>PacketListener</code> used by each {@link MultiplexedMultiUserChat}
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* for all basic processing of presence, and message packets targeted to that chat.
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*
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* @author Larry Kirschner
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*/
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class PacketMultiplexListener implements PacketListener {
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private static final PacketFilter MESSAGE_FILTER =
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new MessageTypeFilter(Message.Type.GROUP_CHAT);
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private static final PacketFilter PRESENCE_FILTER = new PacketTypeFilter(Presence.class);
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private static final PacketFilter SUBJECT_FILTER = new PacketFilter() {
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public boolean accept(Packet packet) {
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Message msg = (Message) packet;
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return msg.getSubject() != null;
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}
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};
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private static final PacketFilter DECLINES_FILTER =
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new PacketExtensionFilter("x",
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"http://jabber.org/protocol/muc#user");
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private ConnectionDetachedPacketCollector messageCollector;
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private PacketListener presenceListener;
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private PacketListener subjectListener;
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private PacketListener declinesListener;
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public PacketMultiplexListener(
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ConnectionDetachedPacketCollector messageCollector,
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PacketListener presenceListener,
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PacketListener subjectListener, PacketListener declinesListener) {
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if (messageCollector == null) {
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throw new IllegalArgumentException("MessageCollector is null");
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}
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if (presenceListener == null) {
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throw new IllegalArgumentException("Presence listener is null");
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}
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if (subjectListener == null) {
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throw new IllegalArgumentException("Subject listener is null");
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}
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if (declinesListener == null) {
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throw new IllegalArgumentException("Declines listener is null");
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}
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this.messageCollector = messageCollector;
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this.presenceListener = presenceListener;
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this.subjectListener = subjectListener;
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this.declinesListener = declinesListener;
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}
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public void processPacket(Packet p) {
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if (PRESENCE_FILTER.accept(p)) {
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presenceListener.processPacket(p);
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}
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else if (MESSAGE_FILTER.accept(p)) {
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messageCollector.processPacket(p);
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if (SUBJECT_FILTER.accept(p)) {
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subjectListener.processPacket(p);
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}
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}
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else if (DECLINES_FILTER.accept(p)) {
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declinesListener.processPacket(p);
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}
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}
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}
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/**
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* $RCSfile$
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* $Revision: 2779 $
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* $Date: 2005-09-05 17:00:45 -0300 (Mon, 05 Sep 2005) $
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*
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* Copyright 2003-2006 Jive Software.
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.muc;
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import org.jivesoftware.smack.ConnectionListener;
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import org.jivesoftware.smack.PacketListener;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.filter.PacketFilter;
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import org.jivesoftware.smack.packet.Packet;
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import org.jivesoftware.smack.util.StringUtils;
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import java.lang.ref.WeakReference;
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import java.util.Map;
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import java.util.WeakHashMap;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* A <code>RoomListenerMultiplexor</code> multiplexes incoming packets on
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* an <code>XMPPConnection</code> using a single listener/filter pair.
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* A single <code>RoomListenerMultiplexor</code> is created for each
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* {@link org.jivesoftware.smack.XMPPConnection} that has joined MUC rooms
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* within its session.
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*
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* @author Larry Kirschner
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*/
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class RoomListenerMultiplexor implements ConnectionListener {
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// We use a WeakHashMap so that the GC can collect the monitor when the
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// connection is no longer referenced by any object.
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private static final Map<XMPPConnection, WeakReference<RoomListenerMultiplexor>> monitors =
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new WeakHashMap<XMPPConnection, WeakReference<RoomListenerMultiplexor>>();
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private XMPPConnection connection;
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private RoomMultiplexFilter filter;
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private RoomMultiplexListener listener;
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/**
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* Returns a new or existing RoomListenerMultiplexor for a given connection.
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*
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* @param conn the connection to monitor for room invitations.
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* @return a new or existing RoomListenerMultiplexor for a given connection.
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*/
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public static RoomListenerMultiplexor getRoomMultiplexor(XMPPConnection conn) {
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synchronized (monitors) {
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if (!monitors.containsKey(conn)) {
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RoomListenerMultiplexor rm = new RoomListenerMultiplexor(conn, new RoomMultiplexFilter(),
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new RoomMultiplexListener());
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rm.init();
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// We need to use a WeakReference because the monitor references the
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// connection and this could prevent the GC from collecting the monitor
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// when no other object references the monitor
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monitors.put(conn, new WeakReference<RoomListenerMultiplexor>(rm));
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}
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// Return the InvitationsMonitor that monitors the connection
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return monitors.get(conn).get();
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}
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}
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/**
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* All access should be through
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* the static method {@link #getRoomMultiplexor(XMPPConnection)}.
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*/
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private RoomListenerMultiplexor(XMPPConnection connection, RoomMultiplexFilter filter,
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RoomMultiplexListener listener) {
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if (connection == null) {
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throw new IllegalArgumentException("Connection is null");
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}
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if (filter == null) {
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throw new IllegalArgumentException("Filter is null");
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}
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if (listener == null) {
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throw new IllegalArgumentException("Listener is null");
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}
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this.connection = connection;
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this.filter = filter;
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this.listener = listener;
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}
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public void addRoom(String address, PacketMultiplexListener roomListener) {
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filter.addRoom(address);
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listener.addRoom(address, roomListener);
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}
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public void connectionClosed() {
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cancel();
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}
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public void connectionClosedOnError(Exception e) {
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cancel();
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}
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/**
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* Initializes the listeners to detect received room invitations and to detect when the
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* connection gets closed. As soon as a room invitation is received the invitations
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* listeners will be fired. When the connection gets closed the monitor will remove
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* his listeners on the connection.
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*/
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public void init() {
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connection.addConnectionListener(this);
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connection.addPacketListener(listener, filter);
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}
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public void removeRoom(String address) {
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filter.removeRoom(address);
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listener.removeRoom(address);
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}
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/**
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* Cancels all the listeners that this InvitationsMonitor has added to the connection.
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*/
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private void cancel() {
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connection.removeConnectionListener(this);
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connection.removePacketListener(listener);
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}
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/**
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* The single <code>XMPPConnection</code>-level <code>PacketFilter</code> used by a {@link RoomListenerMultiplexor}
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* for all muc chat rooms on an <code>XMPPConnection</code>.
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* Each time a muc chat room is added to/removed from an
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* <code>XMPPConnection</code> the address for that chat room
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* is added to/removed from that <code>XMPPConnection</code>'s
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* <code>RoomMultiplexFilter</code>.
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*/
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private static class RoomMultiplexFilter implements PacketFilter {
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private Map<String, String> roomAddressTable = new ConcurrentHashMap<String, String>();
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public boolean accept(Packet p) {
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String from = p.getFrom();
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if (from == null) {
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return false;
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}
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return roomAddressTable.containsKey(StringUtils.parseBareAddress(from).toLowerCase());
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}
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public void addRoom(String address) {
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if (address == null) {
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return;
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}
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roomAddressTable.put(address.toLowerCase(), address);
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}
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public void removeRoom(String address) {
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if (address == null) {
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return;
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}
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roomAddressTable.remove(address.toLowerCase());
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}
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}
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/**
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* The single <code>XMPPConnection</code>-level <code>PacketListener</code>
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* used by a {@link RoomListenerMultiplexor}
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* for all muc chat rooms on an <code>XMPPConnection</code>.
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* Each time a muc chat room is added to/removed from an
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* <code>XMPPConnection</code> the address and listener for that chat room
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* are added to/removed from that <code>XMPPConnection</code>'s
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* <code>RoomMultiplexListener</code>.
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*
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* @author Larry Kirschner
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*/
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private static class RoomMultiplexListener implements PacketListener {
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private Map<String, PacketMultiplexListener> roomListenersByAddress =
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new ConcurrentHashMap<String, PacketMultiplexListener>();
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public void processPacket(Packet p) {
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String from = p.getFrom();
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if (from == null) {
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return;
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}
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PacketMultiplexListener listener =
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roomListenersByAddress.get(StringUtils.parseBareAddress(from).toLowerCase());
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if (listener != null) {
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listener.processPacket(p);
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}
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}
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public void addRoom(String address, PacketMultiplexListener listener) {
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if (address == null) {
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return;
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}
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roomListenersByAddress.put(address.toLowerCase(), listener);
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}
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public void removeRoom(String address) {
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if (address == null) {
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return;
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}
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roomListenersByAddress.remove(address.toLowerCase());
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}
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}
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}
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