net.sf.ehcache.distribution.jgroups.jmx
Class AtomicRate

java.lang.Object
  net.sf.ehcache.distribution.jgroups.jmx.AtomicRate

public final class AtomicRate
extends Object

Tracks a rate (counter / time) using a bucket based approach to reduce overhead.

This is thread safe

Author:

Eric Dalquist

Constructor Summary

AtomicRate(int duration, TimeUnit unit)

Method Summary

void	count() Increment the counter
double	getRate()
long	getRateDuration()
TimeUnit	getRateUnit()

Methods inherited from class java.lang.Object

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

Constructor Detail

AtomicRate

public AtomicRate(int duration,
                  TimeUnit unit)

Parameters:

duration - Duration the rate spans

unit - The time unit for the duration

Method Detail

getRateUnit

public TimeUnit getRateUnit()

Returns:

The TimeUnit the rate is over

getRateDuration

public long getRateDuration()

Returns:

The duration the rate covers, returned in the scale of the getRateUnit()

count

public void count()

Increment the counter

getRate

public double getRate()

Returns:

The current rate. The rate returned is in the TimeUnit used provided in the constructor.