jgroup.util
Class ThreadMonitor

java.lang.Object
  java.lang.Thread
      jgroup.util.ThreadMonitor

All Implemented Interfaces:

java.lang.Runnable

public class ThreadMonitor
extends java.lang.Thread

Monitor threads to detect thread failures, and perform corrective action in case some thread has crashed.

This class is helpful with respect to debugging deadlock problems, especially when DUMP_ALL_THREADS is set to true. This will, at regular intervals, dump the stack trace of all threads allowing the developer to identify threads that might have entered into a deadlock situation awaiting a lock being held by another thread.

This class requires JDK 5.0, but is not mandatory for general use of Jgroup/ARM, and as such use of this class may be disabled.

Since:

Jgroup 2.1

Author:

Hein Meling

Nested Class Summary

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

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Method Summary

static void	add(java.lang.Thread thread) Add the given thread to the monitor.
static void	dumpAllThreads()
static void	remove(java.lang.Thread thread) Remove the given thread from being monitored.
void	run()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, 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

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

Method Detail

add

public static void add(java.lang.Thread thread)

Add the given thread to the monitor.

remove

public static void remove(java.lang.Thread thread)

Remove the given thread from being monitored.

dumpAllThreads

public static void dumpAllThreads()

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread