1 /*
2 The contents of this file are subject to the Mozilla Public License Version 1.1
3 (the "License"); you may not use this file except in compliance with the License.
4 You may obtain a copy of the License at http://www.mozilla.org/MPL/
5 Software distributed under the License is distributed on an "AS IS" basis,
6 WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
7 specific language governing rights and limitations under the License.
8
9 The Original Code is "JMSTopicAdapter.java". Description:
10 "An implementation of JMSDestination that uses an underlying Topic."
11
12 The Initial Developer of the Original Code is University Health Network. Copyright (C)
13 2004. All Rights Reserved.
14
15 Contributor(s): ______________________________________.
16
17 Alternatively, the contents of this file may be used under the terms of the
18 GNU General Public License (the "GPL"), in which case the provisions of the GPL are
19 applicable instead of those above. If you wish to allow use of your version of this
20 file only under the terms of the GPL and not to allow others to use your version
21 of this file under the MPL, indicate your decision by deleting the provisions above
22 and replace them with the notice and other provisions required by the GPL License.
23 If you do not delete the provisions above, a recipient may use your version of
24 this file under either the MPL or the GPL.
25 */
26
27 package ca.uhn.hl7v2.protocol.impl;
28
29 import javax.jms.Connection;
30 import javax.jms.JMSException;
31 import javax.jms.Message;
32 import javax.jms.Session;
33 import javax.jms.TextMessage;
34 import javax.jms.Topic;
35 import javax.jms.TopicConnection;
36 import javax.jms.TopicPublisher;
37 import javax.jms.TopicSession;
38 import javax.jms.TopicSubscriber;
39
40 import ca.uhn.hl7v2.protocol.JMSDestination;
41
42 /**
43 * An implementation of <code>JMSDestination</code> that uses an underlying
44 * Topic.
45 *
46 * @author <a href="mailto:bryan.tripp@uhn.on.ca">Bryan Tripp</a>
47 * @version $Revision: 1.1 $ updated on $Date: 2007-02-19 02:24:26 $ by $Author: jamesagnew $
48 */
49 public class JMSTopicAdapter implements JMSDestination {
50
51 private TopicSession mySendingSession;
52 private TopicSession myReceivingSession;
53 private TopicPublisher myPublisher;
54 private TopicSubscriber mySubscriber;
55 private final TopicConnection myConnection;
56 private final Topic myTopic;
57 private boolean myIsConnected;
58
59 /**
60 * @param theConnection the connection over which messages are written and read
61 * @param theDestination the destination to/from which messages are written/read
62 */
63 public JMSTopicAdapter(TopicConnection theConnection, Topic theDestination) {
64 myConnection = theConnection;
65 myTopic = theDestination;
66 }
67
68 /**
69 * @param theConnection the connection over which messages are written and read
70 * @param theDestination the destination to/from which messages are written/read
71 * @param theMessageSelector a JMS message selector which restricts the inbound
72 * messages that are received (see JMS docs)
73 */
74 public JMSTopicAdapter(TopicConnection theConnection, Topic theDestination, String theMessageSelector) {
75 myConnection = theConnection;
76 myTopic = theDestination;
77 }
78
79 /**
80 * @see ca.uhn.hl7v2.protocol.JMSDestination#getName()
81 */
82 public String getName() throws JMSException {
83 return myTopic.getTopicName();
84 }
85
86 /**
87 * @see ca.uhn.hl7v2.protocol.JMSDestination#createMessage()
88 */
89 public TextMessage createMessage() throws JMSException {
90 return mySendingSession.createTextMessage();
91 }
92
93 /**
94 * @see ca.uhn.hl7v2.protocol.JMSDestination#connect()
95 */
96 public void connect() throws JMSException {
97 boolean transacted = false;
98 int ackMode = Session.AUTO_ACKNOWLEDGE;
99
100 disconnect();
101
102 mySendingSession = myConnection.createTopicSession(transacted, ackMode);
103 myPublisher = mySendingSession.createPublisher(myTopic);
104
105 myReceivingSession = myConnection.createTopicSession(transacted, ackMode);
106 mySubscriber = myReceivingSession.createSubscriber(myTopic);
107
108 myIsConnected = true;
109 }
110
111 /**
112 * @see ca.uhn.hl7v2.protocol.JMSDestination#disconnect()
113 */
114 public void disconnect() throws JMSException {
115 myIsConnected = false;
116
117 if (mySendingSession != null) {
118 mySendingSession.close();
119 }
120 if (myReceivingSession != null) {
121 myReceivingSession.close();
122 }
123 }
124
125 /**
126 * @see ca.uhn.hl7v2.protocol.JMSDestination#isConnected()
127 */
128 public boolean isConnected() {
129 return myIsConnected;
130 }
131
132 /**
133 * @see ca.uhn.hl7v2.protocol.JMSDestination#send(javax.jms.Message)
134 */
135 public void send(Message theMessage) throws JMSException {
136 myPublisher.publish(theMessage);
137 }
138
139 /**
140 * @see ca.uhn.hl7v2.protocol.JMSDestination#receive()
141 */
142 public Message receive() throws JMSException {
143 return mySubscriber.receive();
144 }
145
146 /**
147 * @see ca.uhn.hl7v2.protocol.JMSDestination#getConnection()
148 */
149 public Connection getConnection() {
150 return myConnection;
151 }
152
153 }