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    }