org.apache.reef.wake.metrics

Class EWMA

java.lang.Object

org.apache.reef.wake.metrics.EWMA

public class EWMA
extends Object

Exponentially weighted moving average.

Constructor Summary

Constructors

Constructor and Description
EWMA(double alpha, long interval, TimeUnit intervalUnit) Constructs an EWMA object.

Method Summary

Modifier and Type	Method and Description
double	getRate(TimeUnit rateUnit) Gets the rate.
void	tick() Updates the rate.
void	update(long n) Updates the EWMA with a new value.

Methods inherited from class java.lang.Object

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

Constructor Detail

EWMA

public EWMA(double alpha,
            long interval,
            TimeUnit intervalUnit)

Constructs an EWMA object.

Parameters:

alpha -

interval -

intervalUnit -

Method Detail

update

public void update(long n)

Updates the EWMA with a new value.

Parameters:

n - the new value

tick

public void tick()

Updates the rate.

getRate

public double getRate(TimeUnit rateUnit)

Gets the rate.

Parameters:

rateUnit - the unit of the rate

Returns:

the rate