01: /*
02: * JBoss, Home of Professional Open Source.
03: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
04: * as indicated by the @author tags. See the copyright.txt file in the
05: * distribution for a full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * published by the Free Software Foundation; either version 2.1 of
10: * the License, or (at your option) any later version.
11: *
12: * This software is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this software; if not, write to the Free
19: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21: */
22: package javax.jms;
23:
24: /**
25: * Provides a basic request/reply layer ontop of JMS.
26: * Pass the constructor details of the session/topic to send requests upon.
27: * Then call the request method to send a request. The method will block
28: * until the reply is received.
29: *
30: * @author Chris Kimpton (chris@kimptoc.net)
31: * @author adrian brock (adrian@jboss.com)
32: * @version $Revision: 57196 $
33: */
34: public class TopicRequestor {
35: private TopicSession topicSession = null;
36:
37: private TopicPublisher requestPublisher = null;
38:
39: private TemporaryTopic responseTopic = null;
40:
41: private TopicSubscriber responseSubscriber = null;
42:
43: public TopicRequestor(TopicSession session, Topic topic)
44: throws JMSException {
45: topicSession = session;
46: requestPublisher = topicSession.createPublisher(topic);
47: responseTopic = topicSession.createTemporaryTopic();
48: responseSubscriber = topicSession
49: .createSubscriber(responseTopic);
50: }
51:
52: public Message request(Message message) throws JMSException {
53: message.setJMSReplyTo(responseTopic);
54: requestPublisher.publish(message);
55: return responseSubscriber.receive();
56: }
57:
58: public void close() throws JMSException {
59: try {
60: responseSubscriber.close();
61: } catch (JMSException ignored) {
62: }
63: try {
64: responseTopic.delete();
65: } catch (JMSException ignored) {
66: }
67: topicSession.close();
68: }
69: }
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