SystemTimer.java revision bcb85423bc6855cb1c7accc69fa051e1771c000a
/**
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2007 Sun Microsystems Inc. All Rights Reserved
*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the License). You may not use this file except in
* compliance with the License.
*
* You can obtain a copy of the License at
* https://opensso.dev.java.net/public/CDDLv1.0.html or
* opensso/legal/CDDLv1.0.txt
* See the License for the specific language governing
* permission and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* Header Notice in each file and include the License file
* at opensso/legal/CDDLv1.0.txt.
* If applicable, add the following below the CDDL Header,
* with the fields enclosed by brackets [] replaced by
* your own identifying information:
* "Portions Copyrighted [year] [name of copyright owner]"
*
* $Id: SystemTimer.java,v 1.4 2008/08/08 00:40:59 ww203982 Exp $
*
*/
/*
* Portions Copyrighted 2012 ForgeRock Inc
*/
package com.sun.identity.common;
import com.sun.identity.shared.debug.Debug;
/**
* SystemTimer is a TimerPool which has only 2 Timer shared in the system.
*/
public class SystemTimer {
protected static TimerPool instance;
/**
* Create and return the system timer.
*/
public static synchronized TimerPool getTimer() {
if (instance == null) {
ShutdownManager shutdownMan = ShutdownManager.getInstance();
if (shutdownMan.acquireValidLock()) {
try {
// Don't load the Debug object in static block as it can
// cause issues when doing a container restart.
instance = new TimerPool("SystemTimer", 1, false, Debug.getInstance("SystemTimer"));
shutdownMan.addShutdownListener(new ShutdownListener() {
public void shutdown() {
instance.shutdown();
instance = null;
}
});
} finally {
shutdownMan.releaseLockAndNotify();
}
}
}
return instance;
}
}