com.goldencode.p2j.ui.client.driver.web

Class WatchdogTimer

java.lang.Object

com.goldencode.p2j.ui.client.driver.web.WatchdogTimer

public class WatchdogTimer
extends java.lang.Object

A watchdog timer implementation is based on java.util.Timer. Once the termination task scheduled with the given timeout delay, if the timer is not cancelled before the timer delay expires, then the JVM process is ended using System.exit(). This is useful to cleanup a process which is waiting for a connection that never arrives.

The termination task of this watchdog timer only be started when the process is in a state, where it should be exited at the end of the timeout.

IMPORTANT: Do not use logging anywhere inside this class. When an authentication plugin is running during session establishment with the P2J server using logging no messages are written into the log and the application becomes deadlocked.

Field Summary

Fields

Modifier and Type	Field and Description
private static CentralLogger	LOG Logger
private boolean	running Flag to control a terminate task execution.
private long	timeout Time out value in milliseconds.
private java.util.Timer	timer Watchdog timer

Constructor Summary

Constructors

Constructor and Description
WatchdogTimer(long timeout) Create a new instance and start the timer thread.

Method Summary

Modifier and Type	Method and Description
void	kill() Terminate the watchdog timer thread.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

private static final CentralLogger LOG

Logger

timeout

private volatile long timeout

Time out value in milliseconds.

running

private volatile boolean running

Flag to control a terminate task execution.

timer

private final java.util.Timer timer

Watchdog timer

Constructor Detail

WatchdogTimer

public WatchdogTimer(long timeout)

Create a new instance and start the timer thread.

Parameters:

timeout - The time out value in milliseconds.

Method Detail

kill

public void kill()

Terminate the watchdog timer thread.