001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.component.xmpp;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.RuntimeExchangeException;
021    import org.apache.camel.impl.DefaultProducer;
022    import org.apache.commons.logging.Log;
023    import org.apache.commons.logging.LogFactory;
024    import org.jivesoftware.smack.SmackConfiguration;
025    import org.jivesoftware.smack.XMPPConnection;
026    import org.jivesoftware.smack.XMPPException;
027    import org.jivesoftware.smack.packet.Message;
028    import org.jivesoftware.smackx.muc.DiscussionHistory;
029    import org.jivesoftware.smackx.muc.MultiUserChat;
030    
031    /**
032     * @version $Revision: 14562 $
033     */
034    public class XmppGroupChatProducer extends DefaultProducer {
035        private static final transient Log LOG = LogFactory.getLog(XmppGroupChatProducer.class);
036        private final XmppEndpoint endpoint;
037        private XMPPConnection connection;
038        private MultiUserChat chat;
039        private String room;
040    
041        public XmppGroupChatProducer(XmppEndpoint endpoint) throws XMPPException {
042            super(endpoint);
043            this.endpoint = endpoint;
044        }
045    
046        public void process(Exchange exchange) {
047            Message message = chat.createMessage();
048            message.setTo(room);
049            message.setFrom(endpoint.getUser());
050    
051            endpoint.getBinding().populateXmppMessage(message, exchange);
052            try {
053                // make sure we are connected
054                if (!connection.isConnected()) {
055                    if (LOG.isDebugEnabled()) {
056                        LOG.debug("Reconnecting to: " + XmppEndpoint.getConnectionMessage(connection));
057                    }
058                    connection.connect();
059                }
060    
061                if (LOG.isDebugEnabled()) {
062                    LOG.debug("Sending XMPP message: " + message.getBody());
063                }
064                chat.sendMessage(message);
065                // must invoke nextMessage to consume the response from the server
066                // otherwise the client local queue will fill up (CAMEL-1467)
067                chat.nextMessage();
068            } catch (XMPPException e) {
069                throw new RuntimeExchangeException("Cannot send XMPP message: " + message, exchange, e);
070            }
071        }
072    
073        @Override
074        protected void doStart() throws Exception {
075            if (connection == null) {
076                connection = endpoint.createConnection();
077            }
078    
079            if (chat == null) {
080                room = endpoint.resolveRoom(connection);
081                chat = new MultiUserChat(connection, room);
082                DiscussionHistory history = new DiscussionHistory();
083                history.setMaxChars(0); // we do not want any historical messages
084                chat.join(endpoint.getNickname(), null, history, SmackConfiguration.getPacketReplyTimeout());
085                if (LOG.isInfoEnabled()) {
086                    LOG.info("Joined room: " + room + " as: " + endpoint.getNickname());
087                }
088            }
089    
090            super.doStart();
091        }
092    
093        @Override
094        protected void doStop() throws Exception {
095            if (chat != null) {
096                if (LOG.isInfoEnabled()) {
097                    LOG.info("Leaving room: " + room);
098                }
099                chat.leave();
100                chat = null;
101            }
102            super.doStop();
103        }
104    
105        // Properties
106        // -------------------------------------------------------------------------
107    
108        public String getRoom() {
109            return room;
110        }
111    
112    }