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 tma@netspace.net.au.
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 2001-2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: DelayedAction.java,v 1.6 2004/02/03 21:52:06 tanderson Exp $
44 */
45 package org.exolab.jmscts.core;
46
47 import org.apache.log4j.Category;
48
49
50 /***
51 * Helper class to run an action in a separate thread after a delay,
52 * and catch any exception that the action generates.
53 *
54 * @version $Revision: 1.6 $ $Date: 2004/02/03 21:52:06 $
55 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
56 */
57 public abstract class DelayedAction extends ThreadedAction {
58
59 /***
60 * The time for the thread to sleep, in milliseconds
61 */
62 private final long _sleep;
63
64 /***
65 * The logger
66 */
67 private static final Category log =
68 Category.getInstance(DelayedAction.class);
69
70
71 /***
72 * Construct a new <code>DelayedAction</code>
73 *
74 * @param sleep the time to wait, in milliseconds, before invoking the
75 * action
76 */
77 public DelayedAction(long sleep) {
78 _sleep = sleep;
79 }
80
81 /***
82 * Construct a new <code>DelayedAction</code>, with a listener to notify
83 * on completion
84 *
85 * @param sleep the time to wait, in milliseconds, before invoking the
86 * action
87 * @param listener the listener to notify on completion
88 */
89 public DelayedAction(long sleep, CompletionListener listener) {
90 super(listener);
91 _sleep = sleep;
92 }
93
94 /***
95 * Run the action. This sleeps for the specified time, before invoking
96 * {@link #runProtected}.<br/>
97 * If a {@link CompletionListener} was supplied, it will be notified
98 * on completion of the action.
99 */
100 public void run() {
101 try {
102 Thread.currentThread().sleep(_sleep);
103 } catch (InterruptedException ignore) {
104 log.debug("action interrupted while sleeping - continuing");
105 }
106 super.run();
107 }
108
109 }
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