casa

Class ExitChecker

java.lang.Object

java.lang.Thread

casa.ExitChecker

All Implemented Interfaces:

Runnable

public class ExitChecker
extends Thread

Since we can't trust that AWT or some other thread is spinning and keeping the process alive when we exit, we should explicitly kill the process if we can't find any CASA agent threads or a main program (assumed to be a thread named "main"). We can do this by calling ExitChecker.startExitCheck() somewhere in the program initialization. This will start the ExitChecker thread, which will periodically wake up (every 2 seconds) to check the existance of CASA agent threads or a main thread, and then call System.exit(0) if it can't find any. startExitCheck() can also be called at any time again to do a check immediately.

Author:

kremer

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
private static ExitChecker	exitChecker

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ExitChecker() Hide the constructor (it can only be accessed indirectly by a call to {link ExitChecker#startExitCheck()}).

Method Summary

Modifier and Type	Method and Description
void	run() Wakes up every 2 seconds to check for an CASA agent threads or a main thread.
(package private) static void	startExitCheck() Start up the ExitChecker thread, or, if it's already running, interrupt it to perform a check immediately.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

exitChecker

private static ExitChecker exitChecker

Constructor Detail

ExitChecker

private ExitChecker()

Hide the constructor (it can only be accessed indirectly by a call to {link ExitChecker#startExitCheck()}).

Method Detail

startExitCheck

static void startExitCheck()

Start up the ExitChecker thread, or, if it's already running, interrupt it to perform a check immediately.

run

public void run()

Wakes up every 2 seconds to check for an CASA agent threads or a main thread. If it doesn't find any, calls System.exit().

Specified by:

run in interface Runnable

Overrides:

run in class Thread

See Also:

Thread.run()