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  /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   *
   * Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
   *
   * The contents of this file are subject to the terms of either the GNU
   * General Public License Version 2 only ("GPL") or the Common Development
   * and Distribution License("CDDL") (collectively, the "License").  You
   * may not use this file except in compliance with the License.  You can
  * obtain a copy of the License at
  * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
  * or packager/legal/LICENSE.txt.  See the License for the specific
  * language governing permissions and limitations under the License.
  *
  * When distributing the software, include this License Header Notice in each
  * file and include the License file at packager/legal/LICENSE.txt.
  *
  * GPL Classpath Exception:
  * Oracle designates this particular file as subject to the "Classpath"
  * exception as provided by Oracle in the GPL Version 2 section of the License
  * file that accompanied this code.
  *
  * Modifications:
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  * enclosed by brackets [] replaced by your own identifying information:
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  *
  * Contributor(s):
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  * elects to include this software in this distribution under the [CDDL or GPL
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  * recipient has the option to distribute your version of this file under
  * either the CDDL, the GPL Version 2 or to extend the choice of license to
  * its licensees as provided above.  However, if you add GPL Version 2 code
  * and therefore, elected the GPL Version 2 license, then the option applies
  * only if the new code is made subject to such option by the copyright
  * holder.
  */
 
 package com.sun.enterprise.connectors.util;
 
 import java.util.Date;
 
 public class ConnectorTimerProxy extends Timer {
     
     private volatile static ConnectorTimerProxy connectorTimer;
     private Timer timer;
     private boolean timerException = false;
     private final Object getTimerLock = new Object();
     
     private final static Logger _logger = LogDomains.getLogger(ConnectorTimerProxy.class
             .);
 
     private ConnectorTimerProxy(boolean isDaemon) {
         super(isDaemon);
     }
 
     private Timer getTimer() {
         synchronized () {
             if ( == null || ) {
                 ClassLoader loader = null;
                 try {
                     loader = Thread.currentThread().getContextClassLoader();
                     Thread.currentThread().setContextClassLoader(
                             ConnectorRuntime.getRuntime().getConnectorClassLoader());
                      = new Timer("connector-timer-proxy"true);
                 } finally {
                     Thread.currentThread().setContextClassLoader(loader);
                      = false;
                 }
             }
         }
         return ;        
     }
 
     public static final ConnectorTimerProxy getProxy() {
         if( == null) {
             synchronized (ConnectorTimerProxy.class) {
                 if ( == null) {
                      = new ConnectorTimerProxy(true);
                 }
             }
         }
         return ;
     }
    
    
Proxy method to schedule a timer task at fixed rate. The unchecked exceptions are caught here and in such cases, the timer is recreated and task is rescheduled.

Parameters:
task
delay
period
    @Override
    public void scheduleAtFixedRate(TimerTask tasklong delaylong period) {
         = getTimer();
        try {
            .scheduleAtFixedRate(taskdelayperiod);
        } catch(Exception ex) {
            handleTimerException(ex);
            .scheduleAtFixedRate(taskdelayperiod);
        }
    }
    @Override
    public void cancel() {
         = getTimer();
        try {
            .cancel();
        } catch(Exception ex) {
            .log(."exception_cancelling_timer"ex.getMessage());
        }
    }
    @Override
    public int purge() {
        int status = 0;
         = getTimer();
        try {
            status = .purge();
        } catch(Exception ex) {
            .log(."exception_purging_timer",  ex.getMessage());
        }        
        return status;
    }

    
Proxy method to schedule a timer task after a specified delay. The unchecked exceptions are caught here and in such cases, the timer is recreated and task is rescheduled.

Parameters:
task
delay
period
    @Override
    public void schedule(TimerTask tasklong delay) {
         = getTimer();
        try {
            .schedule(taskdelay);
        } catch(Exception ex) {
            handleTimerException(ex);
            .schedule(taskdelay);
        }
    }

    
Proxy method to schedule a timer task at the specified time. The unchecked exceptions are caught here and in such cases, the timer is recreated and task is rescheduled.

Parameters:
task
delay
period
    
    @Override
    public void schedule(TimerTask taskDate time) {
         = getTimer();
        try {
            .schedule(tasktime);
        } catch(Exception ex) {
            handleTimerException(ex);
            .schedule(tasktime);
        }        
    }

    
Proxy method to schedule a timer task for repeated fixed-delay execution, beginning after the specified delay. The unchecked exceptions are caught here and in such cases, the timer is recreated and task is rescheduled.

Parameters:
task
delay
period
    @Override
    public void schedule(TimerTask tasklong delaylong period) {
         = getTimer();
        try {
            .schedule(taskdelayperiod);
        } catch(Exception ex) {
            handleTimerException(ex);
            .schedule(taskdelayperiod);
        }        
    }

    
Proxy method to schedule a timer task for repeated fixed-delay execution, beginning after the specified delay. The unchecked exceptions are caught here and in such cases, the timer is recreated and task is rescheduled.

Parameters:
task
delay
period
    @Override
    public void schedule(TimerTask taskDate firstTimelong period) {
         = getTimer();
        try {
            .schedule(taskfirstTimeperiod);
        } catch(Exception ex) {
            handleTimerException(ex);
            .schedule(taskfirstTimeperiod);
        }        
    }

    
Proxy method to schedule a timer task for repeated fixed-rate execution, beginning after the specified delay. The unchecked exceptions are caught here and in such cases, the timer is recreated and task is rescheduled.

Parameters:
task
delay
period
    @Override
    public void scheduleAtFixedRate(TimerTask taskDate firstTimelong period) {
         = getTimer();
        try {
            .scheduleAtFixedRate(taskfirstTimeperiod);
        } catch(Exception ex) {
            handleTimerException(ex);
            .scheduleAtFixedRate(taskfirstTimeperiod);
        }        
    }

    
Handle any exception occured during scheduling timer. In case of unchecked exceptions, the timer is recreated to be used by the subsequent requests for scheduling.

Parameters:
ex exception that was caught
    private void handleTimerException(Exception ex) {
        .log(."exception_scheduling_timer"ex.getMessage());
        
        //In case of unchecked exceptions, timer needs to recreated.
        .info("Recreating Timer and scheduling at fixed rate");
         = true;
         = getTimer();
    }
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