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1   /***
2    * Redistribution and use of this software and associated documentation
3    * ("Software"), with or without modification, are permitted provided
4    * that the following conditions are met:
5    *
6    * 1. Redistributions of source code must retain copyright
7    *    statements and notices.  Redistributions must also contain a
8    *    copy of this document.
9    *
10   * 2. Redistributions in binary form must reproduce the
11   *    above copyright notice, this list of conditions and the
12   *    following disclaimer in the documentation and/or other
13   *    materials provided with the distribution.
14   *
15   * 3. The name "Exolab" must not be used to endorse or promote
16   *    products derived from this Software without prior written
17   *    permission of Exoffice Technologies.  For written permission,
18   *    please contact info@exolab.org.
19   *
20   * 4. Products derived from this Software may not be called "Exolab"
21   *    nor may "Exolab" appear in their names without prior written
22   *    permission of Exoffice Technologies. Exolab is a registered
23   *    trademark of Exoffice Technologies.
24   *
25   * 5. Due credit should be given to the Exolab Project
26   *    (http://www.exolab.org/).
27   *
28   * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29   * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
32   * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39   * OF THE POSSIBILITY OF SUCH DAMAGE.
40   *
41   * Copyright 2005 (C) Exoffice Technologies Inc. All Rights Reserved.
42   *
43   * $Id: DestinationConfigurator.java,v 1.1 2005/08/30 07:26:49 tanderson Exp $
44   */
45  package org.exolab.jms.messagemgr;
46  
47  import javax.jms.JMSException;
48  
49  import org.apache.commons.logging.Log;
50  import org.apache.commons.logging.LogFactory;
51  
52  import org.exolab.jms.client.JmsQueue;
53  import org.exolab.jms.client.JmsTopic;
54  import org.exolab.jms.config.AdministeredDestinations;
55  import org.exolab.jms.config.AdministeredQueue;
56  import org.exolab.jms.config.AdministeredTopic;
57  import org.exolab.jms.config.Configuration;
58  import org.exolab.jms.config.Subscriber;
59  import org.exolab.jms.service.Service;
60  import org.exolab.jms.service.ServiceException;
61  
62  
63  /***
64   * Pre-configures {@link DestinationManager} with destinations and and
65   * {@link ConsumerManager} with subscribers from an {@link Configuration}.
66   *
67   * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
68   * @version $Revision: 1.1 $ $Date: 2005/08/30 07:26:49 $
69   */
70  public class DestinationConfigurator extends Service {
71  
72      /***
73       * The configuration to use.
74       */
75      private final Configuration _config;
76  
77      /***
78       * The destination manager.
79       */
80      private final DestinationManager _destinations;
81  
82      /***
83       * The consumer manager.
84       */
85      private final ConsumerManager _consumers;
86  
87      /***
88       * The logger.
89       */
90      private static final Log _log
91              = LogFactory.getLog(DestinationConfigurator.class);
92  
93  
94      /***
95       * Create a new <code>DestinationConfigurator</code>.
96       *
97       * @param config       the configuration to use
98       * @param destinations the destination manager
99       * @param consumers    the consumer manaager
100      */
101     public DestinationConfigurator(Configuration config,
102                                    DestinationManager destinations,
103                                    ConsumerManager consumers) {
104         if (config == null) {
105             throw new IllegalArgumentException("Argument 'config' is null");
106         }
107         if (destinations == null) {
108             throw new IllegalArgumentException(
109                     "Argument 'destinations' is null");
110         }
111         if (consumers == null) {
112             throw new IllegalArgumentException("Argument 'consumers' is null");
113         }
114         _config = config;
115         _destinations = destinations;
116         _consumers = consumers;
117     }
118 
119 
120     /***
121      * Start the service.
122      *
123      * @throws ServiceException if the service fails to start
124      */
125     protected void doStart() throws ServiceException {
126         AdministeredDestinations destinations
127                 = _config.getAdministeredDestinations();
128         if (destinations != null) {
129             configureTopics(destinations.getAdministeredTopic());
130             configureQueues(destinations.getAdministeredQueue());
131         }
132 
133     }
134 
135     /***
136      * Configure topics.
137      *
138      * @param topics the topics to configure
139      */
140     protected void configureTopics(AdministeredTopic[] topics) {
141         for (int i = 0; i < topics.length; ++i) {
142             final AdministeredTopic topic = topics[i];
143             final String name = topics[i].getName();
144 
145             if (_destinations.getDestination(name) == null) {
146                 final JmsTopic destination = new JmsTopic(name);
147                 destination.setPersistent(true);
148                 try {
149                     _destinations.createDestination(destination);
150 
151                     // register the subscribers for each topic.
152                     int scount = topic.getSubscriberCount();
153                     for (int sindex = 0; sindex < scount; sindex++) {
154                         Subscriber subscriber = topic.getSubscriber(sindex);
155                         _consumers.subscribe(destination,
156                                              subscriber.getName(), null);
157                     }
158                 } catch (JMSException exception) {
159                     _log.error("Failed to register persistent topic " + name,
160                                exception);
161                 }
162             }
163         }
164     }
165 
166     /***
167      * Configure queues.
168      *
169      * @param queues the queues to configure
170      */
171     protected void configureQueues(AdministeredQueue[] queues) {
172         for (int i = 0; i < queues.length; ++i) {
173             final AdministeredQueue queue = queues[i];
174             final String name = queue.getName();
175 
176             if (_destinations.getDestination(name) == null) {
177                 JmsQueue destination = new JmsQueue(name);
178                 destination.setPersistent(true);
179                 try {
180                     _destinations.createDestination(destination);
181                 } catch (JMSException exception) {
182                     _log.error("Failed to register persistent queue " + name,
183                                exception);
184                 }
185             }
186         }
187     }
188 
189 }