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 org.apache.camel.impl.PollingConsumerSupport; 021 import org.springframework.jms.core.JmsOperations; 022 import org.springframework.jms.core.JmsTemplate; 023 import org.springframework.jms.core.JmsTemplate102; 024 025 import javax.jms.Message; 026 027 /** 028 * @version $Revision: 1.1 $ 029 */ 030 public class JmsPollingConsumer extends PollingConsumerSupport<JmsExchange> { 031 private JmsOperations template; 032 033 public JmsPollingConsumer(JmsEndpoint endpoint, JmsOperations template) { 034 super(endpoint); 035 this.template = template; 036 } 037 038 @Override 039 public JmsEndpoint getEndpoint() { 040 return (JmsEndpoint) super.getEndpoint(); 041 } 042 043 public JmsExchange receiveNoWait() { 044 return receive(0); 045 } 046 047 public JmsExchange receive() { 048 return receive(-1); 049 } 050 051 public JmsExchange receive(long timeout) { 052 setReceiveTimeout(timeout); 053 Message message = template.receive(); 054 if (message != null) { 055 return getEndpoint().createExchange(message); 056 } 057 return null; 058 } 059 060 protected void doStart() throws Exception { 061 } 062 063 protected void doStop() throws Exception { 064 } 065 066 protected void setReceiveTimeout(long timeout) { 067 if (template instanceof JmsTemplate) { 068 JmsTemplate jmsTemplate = (JmsTemplate) template; 069 jmsTemplate.setReceiveTimeout(timeout); 070 } 071 else if (template instanceof JmsTemplate102) { 072 JmsTemplate102 jmsTemplate102 = (JmsTemplate102) template; 073 jmsTemplate102.setReceiveTimeout(timeout); 074 } 075 else { 076 throw new IllegalArgumentException("Cannot set the receiveTimeout property on unknown JmsOperations type: " + template); 077 } 078 } 079 }