net.timewalker.ffmq4.utils.watchdog

Class ActivityWatchdog

java.lang.Object

java.lang.Thread

net.timewalker.ffmq4.utils.watchdog.ActivityWatchdog

All Implemented Interfaces:

Runnable

public class ActivityWatchdog
extends Thread

Daemon thread watching a list of active objects.

The watchdog will wake up every WAKE_UP_INTERVAL milliseconds and check the active objects last activity timestamps. If an active object has been inactive for too long, its associated timeout callback is called.

The activity watchdog is a singleton.

See Also:

ActiveObject

Nested Class Summary

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

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Method Summary

Modifier and Type	Method and Description
static ActivityWatchdog	getInstance() Get the singleton instance
void	pleaseStop() Ask the watchdog thread to stop
void	register(ActiveObject object) Register an active object to be monitored
void	run()
void	unregister(ActiveObject object) Unregister a monitored active object

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

Method Detail

getInstance

public static ActivityWatchdog getInstance()

Get the singleton instance

Returns:

the singleton instance

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

pleaseStop

public void pleaseStop()

Ask the watchdog thread to stop

register

public void register(ActiveObject object)

Register an active object to be monitored

Parameters:

object - the object to register

unregister

public void unregister(ActiveObject object)

Unregister a monitored active object

Parameters:

object - the object to unregister