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Java > Open Source Codes > org > jacorb > notification > engine > AbstractMessageTask


1 /*
2  * JacORB - a free Java ORB
3  *
4  * Copyright (C) 1999-2004 Gerald Brose
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public
17  * License along with this library; if not, write to the Free
18  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  *
20  */
21
22 package org.jacorb.notification.engine;
23
24 import org.jacorb.notification.interfaces.Message;
25
26 /**
27  * @author Alphonse Bendt
28  * @version $Id: AbstractMessageTask.java,v 1.3 2005/04/27 10:48:40 alphonse.bendt Exp $
29  */
30 public abstract class AbstractMessageTask extends AbstractTask
31 {
32     private Message message_;
33
34     /**
35      * set the Message for this Task to use.
36      */
37     public void setMessage(Message message)
38     {
39         if (message_ != null)
40         {
41             throw new RuntimeException JavaDoc("remove old first");
42         }
43
44         message_ = message;
45     }
46
47     public Message removeMessage()
48     {
49         Message _mesg = message_;
50
51         message_ = null;
52
53         return _mesg;
54     }
55
56     public Message copyMessage()
57     {
58         return (Message) message_.clone();
59     }
60
61     protected boolean isRunnable()
62     {
63         return !message_.isInvalid();
64     }
65
66     protected void checkInterrupt() throws InterruptedException JavaDoc
67     {
68         super.checkInterrupt();
69
70         if (message_.isInvalid())
71         {
72             throw new InterruptedException JavaDoc();
73         }
74     }
75
76     protected Message getMessage()
77     {
78         return message_;
79     }
80
81     public void dispose()
82     {
83         if (message_ != null)
84         {
85             message_.dispose();
86         }
87
88         super.dispose();
89     }
90
91     public void reset()
92     {
93         message_ = null;
94     }
95 }
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