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Java > Open Source Codes > org > mr > api > simple > Producer


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
4  * <a HREF="mailto: support@coridan.com ">support@coridan.com</a>
5  *
6  * The contents of this file are subject to the Mozilla Public License Version
7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
18  * The Initial Developer of the Original Code is Uri Schneider.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
21  *
22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
24  *
25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
27  * provisions of LGPL are applicable instead of those above. If you wish to
28  * allow use of your version of this file only under the terms of the LGPL
29  * License and not to allow others to use your version of this file under
30  * the MPL, indicate your decision by deleting the provisions above and
31  * replace them with the notice and other provisions required by the LGPL.
32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
44  * License for more details.
45  */

46 package org.mr.api.simple;
47
48 import org.mr.api.jms.MantaQueueConnectionFactory;
49
50 /**
51  * Producer.java
52  *
53  * An object used to send messages to a specific queue. Use the
54  * <code>SimpleAPI</code> factory to create one of these, and then simply use
55  * the {@link #send send} method to send messages.<p>
56  * <b>Concurrency</b><p>
57  * This object is not safe for use by multiple concurrent threads. Lock it if
58  * want concurrency.
59  *
60  * Created: Thu Jun 24 19:06:29 2004
61  *
62  * @author Uri Schneider
63  * @version 1.0
64  */

65 public class Producer {
66 // private MantaAgent agent;
67
// private ServiceProducer producer;
68
private String JavaDoc queueName;
69
70     private javax.jms.Session JavaDoc session;
71     private javax.jms.MessageProducer JavaDoc producer;
72
73     Producer(String JavaDoc queueName) throws SimpleException {
74         this.queueName = queueName;
75
76         javax.jms.QueueConnectionFactory JavaDoc factory;
77         javax.jms.QueueConnection JavaDoc connection;
78         javax.jms.Queue JavaDoc queue;
79
80         try {
81             factory = new MantaQueueConnectionFactory();
82             connection = factory.createQueueConnection();
83             this.session = connection.createQueueSession(false,
84                                                          javax.jms.Session.
85                                                          AUTO_ACKNOWLEDGE);
86             queue = session.createQueue(queueName);
87             this.producer = session.createProducer(queue);
88             connection.start();
89         } catch (javax.jms.JMSException JavaDoc e) {
90             throw new SimpleException(e);
91         }
92     } // Producer constructor
93

94     /**
95      * Send a message to this producer's queue.
96      *
97      * @param message The message to be sent.
98      * @throws SimpleException If this producer was closed, or if a timeout
99      * occured.
100      */

101     public void send(Message message) throws SimpleException {
102         if (this.producer == null) {
103             throw new SimpleException(SimpleException.ERROR_CLOSED_ACTOR,
104                                       "Producer for " + this.queueName +
105                                       " is closed. No further messages " +
106                                       "can be sent.");
107         }
108
109         try {
110             javax.jms.BytesMessage JavaDoc jmsMessage =
111                 message.toBytesMessage(this.session);
112             this.producer.send(jmsMessage);
113         } catch (javax.jms.JMSException JavaDoc e) {
114             throw new SimpleException(e);
115         }
116     }
117
118     /**
119      * Close this producer. All resources associated with this producer are
120      * released, and no further operations are allowed.
121      * @throws SimpleException if this producer was already closed.
122      */

123     public void close() throws SimpleException {
124         if (this.producer == null) {
125             throw new SimpleException(SimpleException.ERROR_CLOSED_ACTOR,
126                                       "Publisher for " + this.queueName +
127                                       " is already closed.");
128         }
129         try {
130             this.producer.close();
131             this.producer = null;
132         } catch (javax.jms.JMSException JavaDoc e) {
133             throw new SimpleException(e);
134         }
135     }
136 } // Producer
137
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