com.google.apphosting.runtime.timer

Class AbstractSharedTimerSet

java.lang.Object

com.google.apphosting.runtime.timer.AbstractSharedTimerSet

All Implemented Interfaces:

TimerSet

Direct Known Subclasses:

JmxGcTimerSet, JmxHotspotTimerSet

public abstract class AbstractSharedTimerSet
extends Object
implements TimerSet

AbstractSharedTimerSet tracks a single counter that is shared by all of the Timer instances that are part of the set.

Each Timer returned by createTimer() becomes part of the set that created it, and starting or stopping that timer will increment or decrement the rate at which all other active timers are advancing.

Constructor Summary

Constructors

Constructor and Description
AbstractSharedTimerSet()

Method Summary

Modifier and Type	Method and Description
Timer	createTimer() Create a Timer that becomes a part of this TimerSet.
int	getActiveCount() Returns the number of Timer instances in this set that are currently active (i.e.
protected abstract long	getCurrentShared() Returns the current value of a counter that is shared by all timers created by calling createTimer() on this instance.
protected abstract String	getTitle() Implementations should provide a short, readable string to be included in the toString() output of the timers that they create (e.g.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractSharedTimerSet

public AbstractSharedTimerSet()

Method Detail

createTimer

public Timer createTimer()

Description copied from interface: TimerSet

Create a Timer that becomes a part of this TimerSet.

Specified by:

createTimer in interface TimerSet

getActiveCount

public int getActiveCount()

Description copied from interface: TimerSet

Returns the number of Timer instances in this set that are currently active (i.e. Timer.start() has been called since the last Timer.stop() call.

Specified by:

getActiveCount in interface TimerSet

getCurrentShared

protected abstract long getCurrentShared()

Returns the current value of a counter that is shared by all timers created by calling createTimer() on this instance. The rate of change of this counter will be evenly divided among started Timer instances.

getTitle

protected abstract String getTitle()

Implementations should provide a short, readable string to be included in the toString() output of the timers that they create (e.g. "hotspot").