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    
021    /**
022     * 
023     */
024    public class MutexTransport extends TransportFilter {
025    
026        private final Object writeMutex = new Object();
027    
028        public MutexTransport(Transport next) {
029            super(next);
030        }
031    
032        public FutureResponse asyncRequest(Object command, ResponseCallback responseCallback) throws IOException {
033            synchronized (writeMutex) {
034                return next.asyncRequest(command, null);
035            }
036        }
037    
038        public void oneway(Object command) throws IOException {
039            synchronized (writeMutex) {
040                next.oneway(command);
041            }
042        }
043    
044        public Object request(Object command) throws IOException {
045            synchronized (writeMutex) {
046                return next.request(command);
047            }
048        }
049    
050        public Object request(Object command, int timeout) throws IOException {
051            synchronized (writeMutex) {
052                return next.request(command, timeout);
053            }
054        }
055    
056        public String toString() {
057            return next.toString();
058        }
059    
060    }