org.apache.hadoop.metrics2

类 Metric

java.lang.Object

org.apache.hadoop.metrics2.Metric

直接已知子类:

MetricCounter, MetricGauge

public abstract class Metric
extends Object

The immutable metric

字段概要

字段

限定符和类型	字段和说明
static String	NO_DESCRIPTION

构造器概要

构造器

构造器和说明
Metric(String name) Construct the metric with name only
Metric(String name, String desc) Construct the metric with a name and a description

方法概要

方法

限定符和类型	方法和说明
String	description() Get the description of the metric
boolean	equals(Object obj)
int	hashCode()
String	name() Get the name of the metric
String	toString()
abstract Number	value() Get the value of the metric
abstract void	visit(MetricsVisitor visitor) Accept a visitor interface

从类继承的方法 java.lang.Object

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

字段详细资料

NO_DESCRIPTION

public static final String NO_DESCRIPTION

另请参阅:

常量字段值

构造器详细资料

Metric

public Metric(String name)

Construct the metric with name only

参数:

name - of the metric

Metric

public Metric(String name,
      String desc)

Construct the metric with a name and a description

参数:

name - of the metric

desc - description of the metric

方法详细资料

name

public String name()

Get the name of the metric

返回:

the name

description

public String description()

Get the description of the metric

返回:

the description

value

public abstract Number value()

Get the value of the metric

返回:

the value of the metric

visit

public abstract void visit(MetricsVisitor visitor)

Accept a visitor interface

参数:

visitor - of the metric

equals

public boolean equals(Object obj)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object