org.apache.hadoop.metrics2
Class MetricCounter<T extends Number>

java.lang.Object
  org.apache.hadoop.metrics2.Metric
      org.apache.hadoop.metrics2.MetricCounter<T>

Type Parameters:

T - value type of the metric

public abstract class MetricCounter<T extends Number>
extends Metric

A generic immutable counter metric type

Field Summary

Fields inherited from class org.apache.hadoop.metrics2.Metric

NO_DESCRIPTION

Constructor Summary

MetricCounter(String name, String description)
Construct a counter metric

Method Summary

abstract T

value() Get the value of the metric

Methods inherited from class org.apache.hadoop.metrics2.Metric

description, equals, hashCode, name, toString, visit

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MetricCounter

public MetricCounter(String name,
                     String description)

Construct a counter metric

Parameters:

name - of the metric

description - of the metric

Method Detail

value

public abstract T value()

Description copied from class: Metric

Get the value of the metric

Specified by:

value in class Metric

Returns:

the value of the metric