KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > enhydra > jdbc > pool > PoolKeeper


1 /*
2  * XAPool: Open Source XA JDBC Pool
3  * Copyright (C) 2003 Objectweb.org
4  * Initial Developer: Lutris Technologies Inc.
5  * Contact: xapool-public@lists.debian-sf.objectweb.org
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20  * USA
21  */
22 package org.enhydra.jdbc.pool;
23
24 /**
25  * PoolKeeper class allows to clean up automatically dead and
26  * expired objects.
27  */
28 public class PoolKeeper implements Runnable JavaDoc {
29
30     private long sleepTime; // timeout between 2 clean up
31 private GenericPool pool; // the pool to clean up
32 private boolean running = true;
33
34     /**
35      * constructor, called by GenericPool (any kind of object)
36      */
37     public PoolKeeper(long sleepTime, GenericPool pool) {
38         this.sleepTime = sleepTime;
39         this.pool = pool;
40     }
41
42     public void stop() {
43         synchronized (this ) {
44                         running = false;
45                 }
46     }
47
48     /**
49      * run method. allows to clean up the pool
50      */
51     public void run() {
52         while (running && !Thread.interrupted()) {
53             try {
54                 synchronized (this) {
55                     wait(this.sleepTime); // wait for timeout ms before attack
56 }
57             } catch (InterruptedException JavaDoc e) {
58                                 break;
59             }
60             this.pool.cleanUp(); // clean up the Pool and reallocate objects
61 }
62         // release the pool.
63 this.pool = null;
64     }
65
66 }
Popular Tags