org.apache.hadoop.metrics2.lib
Class MetricMutableGauge<T extends Number>

java.lang.Object
  org.apache.hadoop.metrics2.lib.MetricMutable
      org.apache.hadoop.metrics2.lib.MetricMutableGauge<T>

Type Parameters:

T - the type of the metric

Direct Known Subclasses:

MetricMutableGaugeInt, MetricMutableGaugeLong

public abstract class MetricMutableGauge<T extends Number>
extends MetricMutable

The mutable gauge metric interface

Field Summary

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

description, name

Constructor Summary

MetricMutableGauge(String name, String description)
Construct the metric with name and description

Method Summary

abstract void	decr() Decrement the value of the metric by 1
abstract void	incr() Increment the value of the metric by 1

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

changed, clearChanged, setChanged, snapshot, snapshot

Methods inherited from class java.lang.Object

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

Constructor Detail

MetricMutableGauge

public MetricMutableGauge(String name,
                          String description)

Construct the metric with name and description

Parameters:

name - of the metric

description - of the metric

Method Detail

incr

public abstract void incr()

Increment the value of the metric by 1

decr

public abstract void decr()

Decrement the value of the metric by 1