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https://github.com/vanitasvitae/Smack.git
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fcc8414a92
There is a unsolveable race condition between the connection state and sendPacket(), i.e. the connection could go down, right after the method calling sendPacket is called, but before sendPacket() is invoked. Before this change, sendPacket() has thrown an unchecked IllegalStateException, which could be ignored by the Smack user, who would also not notice the race condition. We have decided to throw a checked Exception in this case now, to make the Smack user aware of this situation. SMACK-426
95 lines
3.5 KiB
Java
95 lines
3.5 KiB
Java
/**
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*
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* Copyright 2003-2006 Jive Software.
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*
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* 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.SmackException.NotConnectedException;
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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 MultiUserChat}
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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.groupchat);
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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) throws NotConnectedException {
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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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