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.codehaus.activecluster.impl;
19
20 import org.apache.commons.logging.Log;
21 import org.apache.commons.logging.LogFactory;
22 import org.codehaus.activecluster.Node;
23
24 import javax.jms.JMSException;
25 import javax.jms.Message;
26 import javax.jms.MessageProducer;
27 import javax.jms.Session;
28
29
30 /***
31 * A local stub for the state service which sends JMS messages
32 * to the cluster
33 *
34 * @version $Revision: 1.5 $
35 */
36 public class StateServiceStub implements StateService {
37
38 private final Log log = LogFactory.getLog(getClass());
39
40 private Session session;
41 private MessageProducer producer;
42
43 public StateServiceStub(Session session, MessageProducer producer) {
44 this.session = session;
45 this.producer = producer;
46 }
47
48 public void keepAlive(Node node) {
49 try {
50 if (log.isDebugEnabled()) {
51 log.debug("Sending cluster data message: " + node);
52 }
53
54 Message message = session.createObjectMessage(new NodeImpl(node));
55 producer.send(message);
56 }
57 catch (JMSException e) {
58 log.error("Could not send JMS message: " + e, e);
59 }
60 }
61
62 public void shutdown(Node node) {
63 try {
64 if (log.isDebugEnabled()) {
65 log.debug("Sending shutdown message: " + node);
66 }
67
68 Message message = session.createObjectMessage(new NodeImpl(node));
69 message.setJMSType("shutdown");
70 producer.send(message);
71 }
72 catch (JMSException e) {
73 log.error("Could not send JMS message: " + e, e);
74 }
75 }
76 }