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.slf4j.Logger;
032    import org.slf4j.LoggerFactory;
033    
034    /**
035     * The StompTransportFilter normally sits on top of a TcpTransport that has been
036     * configured with the StompWireFormat and is used to convert STOMP commands to
037     * ActiveMQ commands. All of the conversion work is done by delegating to the
038     * ProtocolConverter.
039     * 
040     * @author <a href="http://hiramchirino.com">chirino</a>
041     */
042    public class StompTransportFilter extends TransportFilter implements StompTransport {
043        private static final Logger LOG = LoggerFactory.getLogger(StompTransportFilter.class);
044        private final ProtocolConverter protocolConverter;
045        private final FrameTranslator frameTranslator;
046    
047        private boolean trace;
048    
049        public StompTransportFilter(Transport next, FrameTranslator translator, BrokerContext brokerContext) {
050            super(next);
051            this.frameTranslator = translator;
052            this.protocolConverter = new ProtocolConverter(this, translator, brokerContext);
053        }
054    
055        public void oneway(Object o) throws IOException {
056            try {
057                final Command command = (Command)o;
058                protocolConverter.onActiveMQCommand(command);
059            } catch (JMSException e) {
060                throw IOExceptionSupport.create(e);
061            }
062        }
063    
064        public void onCommand(Object command) {
065            try {
066                if (trace) {
067                    LOG.trace("Received: \n" + command);
068                }
069               
070                protocolConverter.onStompCommand((StompFrame)command);
071            } catch (IOException e) {
072                onException(e);
073            } catch (JMSException e) {
074                onException(IOExceptionSupport.create(e));
075            }
076        }
077    
078        public void sendToActiveMQ(Command command) {
079            TransportListener l = transportListener;
080            if (l!=null) {
081                l.onCommand(command);
082            }
083        }
084    
085        public void sendToStomp(StompFrame command) throws IOException {
086            if (trace) {
087                LOG.trace("Sending: \n" + command);
088            }
089            Transport n = next;
090            if (n!=null) {
091                n.oneway(command);
092            }
093        }
094    
095        public FrameTranslator getFrameTranslator() {
096            return frameTranslator;
097        }
098    
099        public X509Certificate[] getPeerCertificates() {
100            if(next instanceof SslTransport) {      
101                    X509Certificate[] peerCerts = ((SslTransport)next).getPeerCertificates();
102                    if (trace && peerCerts != null) {
103                    LOG.debug("Peer Identity has been verified\n");
104                }
105                    return peerCerts;
106            }
107            return null;
108        }
109        
110        public boolean isTrace() {
111            return trace;
112        }
113    
114        public void setTrace(boolean trace) {
115            this.trace = trace;
116        }
117    }