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.servicemix.components.util;
018    
019    import javax.jbi.messaging.MessageExchange;
020    import javax.jbi.messaging.MessagingException;
021    import javax.jbi.messaging.NormalizedMessage;
022    import javax.xml.namespace.QName;
023    
024    import org.apache.commons.logging.Log;
025    import org.apache.commons.logging.LogFactory;
026    import org.apache.servicemix.MessageExchangeListener;
027    
028    /**
029     * A simple, yet useful component for testing synchronous flows. Echos back Exchanges
030     * 
031     * @version $Revision: 564374 $
032     */
033    public class EchoComponent extends TransformComponentSupport implements MessageExchangeListener {
034        
035        private static final Log LOG = LogFactory.getLog(EchoComponent.class);
036        
037        public EchoComponent() {
038        }
039        
040        public EchoComponent(QName service, String endpoint) {
041            super(service, endpoint);
042        }
043        
044        protected boolean transform(MessageExchange exchange, NormalizedMessage in, NormalizedMessage out) throws MessagingException {
045            getMessageTransformer().transform(exchange, in, out);
046            LOG.info("Echoed back message: " + out);
047            return true;
048        }
049    }