Package com.emc.mongoose.base.metrics.type

Class EWMA

java.lang.Object

com.emc.mongoose.base.metrics.type.EWMA

All Implemented Interfaces:

LoadAverage

public final class EWMA
extends java.lang.Object
implements LoadAverage

Copied from dropwizard metrics library 4.0.3

Constructor Summary

Constructors

Constructor	Description
EWMA(double alpha, long interval, java.util.concurrent.TimeUnit intervalUnit)	Create a new EWMA with a specific smoothing constant.

Method Summary

Modifier and Type	Method	Description
double	rate(java.util.concurrent.TimeUnit rateUnit)	Returns the rate in the given units of time.
void	tick()	Mark the passage of time and decay the current rate accordingly.
void	update(long n)	Update the moving average with a new value.

Methods inherited from class java.lang.Object

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

Constructor Detail

EWMA

public EWMA(double alpha,
            long interval,
            java.util.concurrent.TimeUnit intervalUnit)

Create a new EWMA with a specific smoothing constant.

Parameters:

alpha - the smoothing constant

interval - the expected tick interval

intervalUnit - the time unit of the tick interval

Method Detail

update

public final void update(long n)

Description copied from interface: LoadAverage

Update the moving average with a new value.

Specified by:

update in interface LoadAverage

Parameters:

n - the new value

tick

public final void tick()

Description copied from interface: LoadAverage

Mark the passage of time and decay the current rate accordingly.

Specified by:

tick in interface LoadAverage

rate

public final double rate(java.util.concurrent.TimeUnit rateUnit)

Description copied from interface: LoadAverage

Returns the rate in the given units of time.

Specified by:

rate in interface LoadAverage

Parameters:

rateUnit - the unit of time

Returns:

the rate