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 String	desc
protected String	name

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

MAX_METRIC_NAME, MEAN_METRIC_NAME, MEDIAN_METRIC_NAME, MIN_METRIC_NAME, NINETY_FIFTH_PERCENTILE_METRIC_NAME, NINETY_NINETH_PERCENTILE_METRIC_NAME, NUM_OPS_METRIC_NAME, SEVENTY_FIFTH_PERCENTILE_METRIC_NAME

Constructor Summary

Constructors

Constructor and Description
MutableHistogram(org.apache.hadoop.metrics2.MetricsInfo info)
MutableHistogram(String name, String description)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(long val) Add a single value to a histogram's stream of values.
long	getMax()
double	getMean()
long	getMin()
void	snapshot(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder, boolean all)
void	updateSnapshotMetrics(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder)

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

name

protected final String name

desc

protected final String desc

Constructor Detail

MutableHistogram

public MutableHistogram(org.apache.hadoop.metrics2.MetricsInfo info)

MutableHistogram

public MutableHistogram(String name,
                String description)

Method Detail

add

public void add(long val)

Description copied from interface: MetricHistogram

Add a single value to a histogram's stream of values.

Specified by:

add in interface MetricHistogram

getMax

public long getMax()

getMin

public long getMin()

getMean

public double getMean()

snapshot

public void snapshot(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder,
            boolean all)

Specified by:

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

updateSnapshotMetrics

public void updateSnapshotMetrics(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder)