001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.camel.component.jms; 019 020 import javax.jms.Message; 021 import javax.jms.MessageListener; 022 023 import org.apache.camel.Endpoint; 024 import org.apache.camel.Exchange; 025 import org.apache.camel.Processor; 026 import org.apache.camel.RuntimeCamelException; 027 import org.apache.commons.logging.Log; 028 import org.apache.commons.logging.LogFactory; 029 030 /** 031 * A JMS {@link MessageListener} which can be used to delegate processing to a Camel endpoint. 032 * 033 * @version $Revision: 534145 $ 034 */ 035 public class EndpointMessageListener<E extends Exchange> implements MessageListener { 036 private static final transient Log log = LogFactory.getLog(EndpointMessageListener.class); 037 private Endpoint<E> endpoint; 038 private Processor processor; 039 private JmsBinding binding; 040 041 public EndpointMessageListener(Endpoint<E> endpoint, Processor processor) { 042 this.endpoint = endpoint; 043 this.processor = processor; 044 } 045 046 public void onMessage(Message message) { 047 try { 048 049 if (log.isDebugEnabled()) { 050 log.debug(endpoint + " receiving JMS message: " + message); 051 } 052 JmsExchange exchange = createExchange(message); 053 processor.process((E) exchange); 054 055 } catch (Exception e) { 056 throw new RuntimeCamelException(e); 057 } 058 } 059 060 public JmsExchange createExchange(Message message) { 061 return new JmsExchange(endpoint.getContext(), getBinding(), message); 062 } 063 064 // Properties 065 //------------------------------------------------------------------------- 066 public JmsBinding getBinding() { 067 if (binding == null) { 068 binding = new JmsBinding(); 069 } 070 return binding; 071 } 072 073 /** 074 * Sets the binding used to convert from a Camel message to and from a JMS message 075 * 076 * @param binding the binding to use 077 */ 078 public void setBinding(JmsBinding binding) { 079 this.binding = binding; 080 } 081 }