net.admin4j.monitor

Class BlockedThreadDetector

java.lang.Object

net.admin4j.monitor.Detector

net.admin4j.monitor.BlockedThreadDetector

All Implemented Interfaces:

java.lang.Runnable

public class BlockedThreadDetector
extends Detector

Daemon that detects thread contention and emails an admin group.

Since:

1.0

Author:

D. Ashmore

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BLOCKED_THREAD_THRESHOLD
static long	DEFAULT_SLEEP_INTERVAL

Fields inherited from class net.admin4j.monitor.Detector

logger, notifier

Constructor Summary

Constructors

Constructor and Description
BlockedThreadDetector(Notifier notifier, int nbrBlockedThreadThreashold)

Method Summary

Methods

Modifier and Type	Method and Description
void	run()
protected void	sendBlockedThreadNotice(java.util.Set<java.lang.management.ThreadInfo> waitingForLockSet, java.util.Set<java.lang.management.ThreadInfo> holdingLockSet, java.util.Set<java.lang.management.ThreadInfo> alsoBlockedLastIntervalSet)

Methods inherited from class net.admin4j.monitor.Detector

getNotifier, sendMessage

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SLEEP_INTERVAL

public static final long DEFAULT_SLEEP_INTERVAL

See Also:

Constant Field Values

DEFAULT_BLOCKED_THREAD_THRESHOLD

public static final int DEFAULT_BLOCKED_THREAD_THRESHOLD

See Also:

Constant Field Values

Constructor Detail

BlockedThreadDetector

public BlockedThreadDetector(Notifier notifier,
                     int nbrBlockedThreadThreashold)

Method Detail

run

public void run()

sendBlockedThreadNotice

protected void sendBlockedThreadNotice(java.util.Set<java.lang.management.ThreadInfo> waitingForLockSet,
                           java.util.Set<java.lang.management.ThreadInfo> holdingLockSet,
                           java.util.Set<java.lang.management.ThreadInfo> alsoBlockedLastIntervalSet)