Package org.apache.kafka.common.metrics.stats

Class WindowedSum

java.lang.Object

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

org.apache.kafka.common.metrics.stats.WindowedSum

All Implemented Interfaces:

Measurable, MeasurableStat, MetricValueProvider<Double>, Stat

Direct Known Subclasses:

Rate.SampledTotal, Sum, WindowedCount

public class WindowedSum
extends SampledStat

A SampledStat that maintains the sum of what it has seen. This is a sampled version of CumulativeSum. See also WindowedCount if you want to increment the value by 1 on each recording.

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	Description
WindowedSum()

Method Summary

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

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

current, measure, newSample, oldest, purgeObsoleteSamples, record

Methods inherited from class java.lang.Object

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

Constructor Detail

WindowedSum

public WindowedSum()

Method Detail

update

protected void update(SampledStat.Sample sample,
                      MetricConfig config,
                      double value,
                      long now)

Specified by:

update in class SampledStat

combine

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

Specified by:

combine in class SampledStat