hmi.util
Class ThreadDeadlockDetector

java.lang.Object
  hmi.util.ThreadDeadlockDetector

public class ThreadDeadlockDetector
extends Object

Some class for deadlock detection

Author:

Elliott Hughes (?)

Nested Class Summary

static interface

ThreadDeadlockDetector.Listener This is called whenever a problem with threads is detected.

Field Summary

private static int	DEFAULT_DEADLOCK_CHECK_PERIOD The number of milliseconds between checking for deadlocks.
private Collection<ThreadDeadlockDetector.Listener>	listeners
private ThreadMXBean	mbean
private Timer	threadCheck
private static long	TIMERDELAY

Constructor Summary

ThreadDeadlockDetector()

ThreadDeadlockDetector(int deadlockCheckPeriod)

Method Summary

boolean	addListener(ThreadDeadlockDetector.Listener l)
private void	checkForDeadlocks()
private long[]	findDeadlockedThreads()
private Thread	findMatchingThread(ThreadInfo inf)
private void	fireDeadlockDetected(Thread[] threads)
boolean	removeListener(ThreadDeadlockDetector.Listener l)

Methods inherited from class java.lang.Object

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

Field Detail

threadCheck

private final Timer threadCheck

mbean

private final ThreadMXBean mbean

listeners

private final Collection<ThreadDeadlockDetector.Listener> listeners

DEFAULT_DEADLOCK_CHECK_PERIOD

private static final int DEFAULT_DEADLOCK_CHECK_PERIOD

The number of milliseconds between checking for deadlocks. It may be expensive to check for deadlocks, and it is not critical to know so quickly.

See Also:

Constant Field Values

TIMERDELAY

private static final long TIMERDELAY

See Also:

Constant Field Values

Constructor Detail

ThreadDeadlockDetector

public ThreadDeadlockDetector()

ThreadDeadlockDetector

public ThreadDeadlockDetector(int deadlockCheckPeriod)

Method Detail

checkForDeadlocks

private void checkForDeadlocks()

findDeadlockedThreads

private long[] findDeadlockedThreads()

fireDeadlockDetected

private void fireDeadlockDetected(Thread[] threads)

findMatchingThread

private Thread findMatchingThread(ThreadInfo inf)

addListener

public boolean addListener(ThreadDeadlockDetector.Listener l)

removeListener

public boolean removeListener(ThreadDeadlockDetector.Listener l)