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;
018    
019    import java.io.IOException;
020    import java.net.URI;
021    
022    /**
023     * @version $Revision: 1.5 $
024     */
025    public class TransportFilter implements TransportListener, Transport {
026        protected final Transport next;
027        protected TransportListener transportListener;
028    
029        public TransportFilter(Transport next) {
030            this.next = next;
031        }
032    
033        public TransportListener getTransportListener() {
034            return transportListener;
035        }
036    
037        public void setTransportListener(TransportListener channelListener) {
038            this.transportListener = channelListener;
039            if (channelListener == null) {
040                next.setTransportListener(null);
041            } else {
042                next.setTransportListener(this);
043            }
044        }
045    
046        /**
047         * @see org.apache.activemq.Service#start()
048         * @throws IOException if the next channel has not been set.
049         */
050        public void start() throws Exception {
051            if (next == null) {
052                throw new IOException("The next channel has not been set.");
053            }
054            if (transportListener == null) {
055                throw new IOException("The command listener has not been set.");
056            }
057            next.start();
058        }
059    
060        /**
061         * @see org.apache.activemq.Service#stop()
062         */
063        public void stop() throws Exception {
064            next.stop();
065        }
066    
067        public void onCommand(Object command) {
068            transportListener.onCommand(command);
069        }
070    
071        /**
072         * @return Returns the next.
073         */
074        public Transport getNext() {
075            return next;
076        }
077    
078        public String toString() {
079            return next.toString();
080        }
081    
082        public void oneway(Object command) throws IOException {
083            next.oneway(command);
084        }
085    
086        public FutureResponse asyncRequest(Object command, ResponseCallback responseCallback) throws IOException {
087            return next.asyncRequest(command, null);
088        }
089    
090        public Object request(Object command) throws IOException {
091            return next.request(command);
092        }
093    
094        public Object request(Object command, int timeout) throws IOException {
095            return next.request(command, timeout);
096        }
097    
098        public void onException(IOException error) {
099            transportListener.onException(error);
100        }
101    
102        public void transportInterupted() {
103            transportListener.transportInterupted();
104        }
105    
106        public void transportResumed() {
107            transportListener.transportResumed();
108        }
109    
110        public <T> T narrow(Class<T> target) {
111            if (target.isAssignableFrom(getClass())) {
112                return target.cast(this);
113            }
114            return next.narrow(target);
115        }
116    
117        public String getRemoteAddress() {
118            return next.getRemoteAddress();
119        }
120    
121        /**
122         * @return
123         * @see org.apache.activemq.transport.Transport#isFaultTolerant()
124         */
125        public boolean isFaultTolerant() {
126            return next.isFaultTolerant();
127        }
128    
129            public boolean isDisposed() {
130                    return next.isDisposed();
131            }
132            
133            public boolean isConnected() {
134            return next.isConnected();
135        }
136    
137            public void reconnect(URI uri) throws IOException {
138                    next.reconnect(uri);
139            }
140    
141        public int getReceiveCounter() {
142            return next.getReceiveCounter();
143        }
144    }