Source code: org/activemq/spring/SpringConsumer.java
1 /**
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.activemq.spring;
19
20 import org.apache.commons.logging.Log;
21 import org.apache.commons.logging.LogFactory;
22 import org.activemq.service.Service;
23 import org.springframework.jms.core.JmsTemplate;
24
25 import javax.jms.Connection;
26 import javax.jms.ConnectionFactory;
27 import javax.jms.Destination;
28 import javax.jms.JMSException;
29 import javax.jms.Message;
30 import javax.jms.MessageConsumer;
31 import javax.jms.MessageListener;
32 import javax.jms.Session;
33
34 /**
35 * @author Mike Perham
36 * @version $Revision$
37 */
38 public class SpringConsumer extends ConsumerBean implements Service, MessageListener {
39 private static final Log log = LogFactory.getLog(SpringConsumer.class);
40
41 private JmsTemplate template;
42 private String myId = "foo";
43 private Destination destination;
44 private Connection connection;
45 private Session session;
46 private MessageConsumer consumer;
47
48 public void start() throws JMSException {
49 String selector = "next = '" + myId + "'";
50
51 try {
52 ConnectionFactory factory = template.getConnectionFactory();
53 connection = factory.createConnection();
54
55 // we might be a reusable connection in spring
56 // so lets only set the client ID once if its not set
57 synchronized (connection) {
58 if (connection.getClientID() == null) {
59 connection.setClientID(myId);
60 }
61 }
62
63 connection.start();
64
65 session = connection.createSession(true, Session.CLIENT_ACKNOWLEDGE);
66 consumer = session.createConsumer(destination, selector, false);
67 consumer.setMessageListener(this);
68 }
69 catch (JMSException ex) {
70 log.error("", ex);
71 throw ex;
72 }
73 }
74
75
76 public void stop() throws JMSException {
77 if( consumer!=null )
78 consumer.close();
79 if( session!=null )
80 session.close();
81 if( connection!=null )
82 connection.close();
83 }
84
85 public void onMessage(Message message) {
86 super.onMessage(message);
87 try {
88 message.acknowledge();
89 }
90 catch (JMSException e) {
91 log.error("Failed to acknowledge: " + e, e);
92 }
93 }
94
95 // Properties
96 //-------------------------------------------------------------------------
97 public Destination getDestination() {
98 return destination;
99 }
100
101 public void setDestination(Destination destination) {
102 this.destination = destination;
103 }
104
105 public String getMyId() {
106 return myId;
107 }
108
109 public void setMyId(String myId) {
110 this.myId = myId;
111 }
112
113 public JmsTemplate getTemplate() {
114 return template;
115 }
116
117 public void setTemplate(JmsTemplate template) {
118 this.template = template;
119 }
120 }