org.apache.kafka.common.metrics.stats

Class WindowedCount

java.lang.Object

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

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

org.apache.kafka.common.metrics.stats.WindowedCount

All Implemented Interfaces:

Measurable, MeasurableStat, MetricValueProvider<java.lang.Double>, Stat

Direct Known Subclasses:

Count

public class WindowedCount
extends WindowedSum

A SampledStat that maintains a simple count of what it has seen. This is a special kind of WindowedSum that always records a value of 1 instead of the provided value. In other words, it counts the number of SampledStat.record(MetricConfig, double, long) invocations, instead of summing the recorded values. See also CumulativeCount for a non-sampled version of this metric.

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
WindowedCount()

Method Summary

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

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

combine

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

WindowedCount

public WindowedCount()

Method Detail

update

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

Overrides:

update in class WindowedSum