org.apache.kafka.common.metrics.stats

Class ExponentialWeightedAvg

java.lang.Object

org.apache.kafka.common.metrics.stats.SampledStat

org.apache.kafka.common.metrics.stats.Avg

org.apache.kafka.common.metrics.stats.ExponentialWeightedAvg

All Implemented Interfaces:

Measurable, MeasurableStat, MetricValueProvider<Double>, Stat

public class ExponentialWeightedAvg
extends Avg

A SampledStat that maintains an exponentially weighted average over its samples. This is the same as an Exponential Moving Average for a fixed sample set

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.kafka.common.metrics.stats.SampledStat

SampledStat.Sample

Field Summary

Fields inherited from class org.apache.kafka.common.metrics.stats.SampledStat

samples

Constructor Summary

Constructors

Constructor and Description
ExponentialWeightedAvg(double alpha)

Method Summary

Modifier and Type	Method and Description
double	combine(List<SampledStat.Sample> samples, MetricConfig config, long now)

Methods inherited from class org.apache.kafka.common.metrics.stats.Avg

update

Methods inherited from class org.apache.kafka.common.metrics.stats.SampledStat

current, measure, newSample, oldest, purgeObsoleteSamples, record, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ExponentialWeightedAvg

public ExponentialWeightedAvg(double alpha)

Method Detail

combine

public double combine(List<SampledStat.Sample> samples,
                      MetricConfig config,
                      long now)

Overrides:

combine in class Avg