org.apache.hadoop.metrics2.lib
Class MetricMutableHistogram

java.lang.Object
  org.apache.hadoop.metrics2.lib.MetricMutable
      org.apache.hadoop.metrics2.lib.MetricMutableHistogram

All Implemented Interfaces:

MetricHistogram

Direct Known Subclasses:

MetricMutableRangeHistogram

public class MetricMutableHistogram
extends org.apache.hadoop.metrics2.lib.MetricMutable
implements MetricHistogram

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

Field Summary

Fields inherited from class org.apache.hadoop.metrics2.lib.MetricMutable

description, 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_FIFTH_PERCENTILE_METRIC_NAME, NINETY_NINETH_PERCENTILE_METRIC_NAME, NUM_OPS_METRIC_NAME, SEVENTY_FIFTH_PERCENTILE_METRIC_NAME

Constructor Summary

MetricMutableHistogram(String name, String description)

Method Summary

void	add(long val)
long	getMax()
double	getMean()
long	getMin()
void	snapshot(MetricsRecordBuilder metricsRecordBuilder, boolean all)
void	updateSnapshotMetrics(MetricsRecordBuilder metricsRecordBuilder)

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

changed, clearChanged, setChanged, snapshot

Methods inherited from class java.lang.Object

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

Constructor Detail

MetricMutableHistogram

public MetricMutableHistogram(String name,
                              String description)

Method Detail

add

public void add(long val)

Specified by:

add in interface MetricHistogram

getMax

public long getMax()

getMin

public long getMin()

getMean

public double getMean()

snapshot

public void snapshot(MetricsRecordBuilder metricsRecordBuilder,
                     boolean all)

Specified by:

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

updateSnapshotMetrics

public void updateSnapshotMetrics(MetricsRecordBuilder metricsRecordBuilder)