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.activemq.transport.stomp;
018    
019    import java.io.IOException;
020    import java.security.cert.X509Certificate;
021    
022    import javax.jms.JMSException;
023    
024    import org.apache.activemq.broker.BrokerContext;
025    import org.apache.activemq.command.Command;
026    import org.apache.activemq.transport.Transport;
027    import org.apache.activemq.transport.TransportFilter;
028    import org.apache.activemq.transport.TransportListener;
029    import org.apache.activemq.transport.tcp.SslTransport;
030    import org.apache.activemq.util.IOExceptionSupport;
031    import org.apache.activemq.wireformat.WireFormat;
032    import org.slf4j.Logger;
033    import org.slf4j.LoggerFactory;
034    
035    /**
036     * The StompTransportFilter normally sits on top of a TcpTransport that has been
037     * configured with the StompWireFormat and is used to convert STOMP commands to
038     * ActiveMQ commands. All of the conversion work is done by delegating to the
039     * ProtocolConverter.
040     *
041     * @author <a href="http://hiramchirino.com">chirino</a>
042     */
043    public class StompTransportFilter extends TransportFilter implements StompTransport {
044        private static final Logger LOG = LoggerFactory.getLogger(StompTransportFilter.class);
045        private static final Logger TRACE = LoggerFactory.getLogger(StompTransportFilter.class.getPackage().getName() + ".StompIO");
046        private final ProtocolConverter protocolConverter;
047        private StompInactivityMonitor monitor;
048        private StompWireFormat wireFormat;
049    
050        private boolean trace;
051    
052        public StompTransportFilter(Transport next, WireFormat wireFormat, BrokerContext brokerContext) {
053            super(next);
054            this.protocolConverter = new ProtocolConverter(this, brokerContext);
055    
056            if (wireFormat instanceof StompWireFormat) {
057                this.wireFormat = (StompWireFormat) wireFormat;
058            }
059        }
060    
061        public void oneway(Object o) throws IOException {
062            try {
063                final Command command = (Command) o;
064                protocolConverter.onActiveMQCommand(command);
065            } catch (JMSException e) {
066                throw IOExceptionSupport.create(e);
067            }
068        }
069    
070        public void onCommand(Object command) {
071            try {
072                if (trace) {
073                    TRACE.trace("Received: \n" + command);
074                }
075    
076                protocolConverter.onStompCommand((StompFrame) command);
077            } catch (IOException e) {
078                onException(e);
079            } catch (JMSException e) {
080                onException(IOExceptionSupport.create(e));
081            }
082        }
083    
084        public void sendToActiveMQ(Command command) {
085            TransportListener l = transportListener;
086            if (l != null) {
087                l.onCommand(command);
088            }
089        }
090    
091        public void sendToStomp(StompFrame command) throws IOException {
092            if (trace) {
093                TRACE.trace("Sending: \n" + command);
094            }
095            Transport n = next;
096            if (n != null) {
097                n.oneway(command);
098            }
099        }
100    
101        public X509Certificate[] getPeerCertificates() {
102            if (next instanceof SslTransport) {
103                X509Certificate[] peerCerts = ((SslTransport) next).getPeerCertificates();
104                if (trace && peerCerts != null) {
105                    LOG.debug("Peer Identity has been verified\n");
106                }
107                return peerCerts;
108            }
109            return null;
110        }
111    
112        public boolean isTrace() {
113            return trace;
114        }
115    
116        public void setTrace(boolean trace) {
117            this.trace = trace;
118        }
119    
120        @Override
121        public StompInactivityMonitor getInactivityMonitor() {
122            return monitor;
123        }
124    
125        public void setInactivityMonitor(StompInactivityMonitor monitor) {
126            this.monitor = monitor;
127        }
128    
129        @Override
130        public StompWireFormat getWireFormat() {
131            return this.wireFormat;
132        }
133    
134        public String getDefaultHeartBeat() {
135            return protocolConverter != null ? protocolConverter.getDefaultHeartBeat() : null;
136        }
137    
138        public void setDefaultHeartBeat(String defaultHeartBeat) {
139            protocolConverter.setDefaultHeartBeat(defaultHeartBeat);
140        }
141    
142    }