org.apache.hadoop.metrics2.lib

Class MutableHistogram

java.lang.Object

org.apache.hadoop.metrics2.lib.MutableMetric

org.apache.hadoop.metrics2.lib.MutableHistogram

All Implemented Interfaces:

MetricHistogram

Direct Known Subclasses:

MutableRangeHistogram

@InterfaceAudience.Private
public class MutableHistogram
extends org.apache.hadoop.metrics2.lib.MutableMetric
implements MetricHistogram

A histogram implementation that runs in constant space, and exports to hadoop2's metrics2 system.

Field Summary

Fields

Modifier and Type	Field and Description
protected Counter	counter
protected String	desc
protected FastLongHistogram	histogram
protected String	name

Fields inherited from interface org.apache.hadoop.metrics2.MetricHistogram

MAX_METRIC_NAME, MEAN_METRIC_NAME, MEDIAN_METRIC_NAME, MIN_METRIC_NAME, NINETIETH_PERCENTILE_METRIC_NAME, NINETY_EIGHTH_PERCENTILE_METRIC_NAME, NINETY_FIFTH_PERCENTILE_METRIC_NAME, NINETY_NINE_POINT_NINETH_PERCENTILE_METRIC_NAME, NINETY_NINETH_PERCENTILE_METRIC_NAME, NUM_OPS_METRIC_NAME, SEVENTY_FIFTH_PERCENTILE_METRIC_NAME, TWENTY_FIFTH_PERCENTILE_METRIC_NAME

Constructor Summary

Constructors

Modifier	Constructor and Description
	MutableHistogram(MetricsInfo info)
	MutableHistogram(String name, String description)
protected	MutableHistogram(String name, String description, long maxExpected)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(long val)
long	getMax()
void	snapshot(MetricsRecordBuilder metricsRecordBuilder, boolean all)
protected void	updateSnapshotMetrics(MetricsRecordBuilder metricsRecordBuilder, FastLongHistogram histo)

Methods inherited from class org.apache.hadoop.metrics2.lib.MutableMetric

changed, clearChanged, setChanged, snapshot

Methods inherited from class java.lang.Object

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

Field Detail

histogram

protected final FastLongHistogram histogram

name

protected final String name

desc

protected final String desc

counter

protected final Counter counter

Constructor Detail

MutableHistogram

public MutableHistogram(MetricsInfo info)

MutableHistogram

public MutableHistogram(String name,
                String description)

MutableHistogram

protected MutableHistogram(String name,
                String description,
                long maxExpected)

Method Detail

add

public void add(long val)

Specified by:

add in interface MetricHistogram

getMax

public long getMax()

snapshot

public void snapshot(MetricsRecordBuilder metricsRecordBuilder,
            boolean all)

Specified by:

snapshot in class org.apache.hadoop.metrics2.lib.MutableMetric

updateSnapshotMetrics

protected void updateSnapshotMetrics(MetricsRecordBuilder metricsRecordBuilder,
                         FastLongHistogram histo)