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Java > Open Source Codes > com > caucho > resources > TaskResource


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.resources;
30
31 import com.caucho.config.ConfigException;
32 import com.caucho.log.Log;
33 import com.caucho.util.L10N;
34
35 import javax.annotation.PostConstruct;
36 import javax.annotation.Resource;
37 import java.util.concurrent.Executor JavaDoc;
38 import java.util.logging.Logger JavaDoc;
39
40 /**
41  * The task resource starts a backgroun task on initialization.
42  * intervals.
43  */
44 public class TaskResource {
45   private static final L10N L = new L10N(TaskResource.class);
46   private static final Logger JavaDoc log = Log.open(TaskResource.class);
47
48   @Resource
49   private Executor JavaDoc _executor;
50   
51   private Runnable JavaDoc _work;
52
53   /**
54    * Sets the work task.
55    */
56   public void setWork(Runnable JavaDoc work)
57   {
58     _work = work;
59   }
60
61   /**
62    * Initialization.
63    */
64   @PostConstruct
65   public void init()
66     throws ConfigException
67   {
68     if (_work == null)
69       throw new ConfigException(L.l("TaskResource needs a <work> task."));
70   }
71
72   /**
73    * Starting.
74    */
75   public void start()
76   {
77     _executor.execute(_work);
78   }
79 }
80
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