org.apache.hadoop.metrics2.lib

类 MetricMutable

java.lang.Object

org.apache.hadoop.metrics2.lib.MetricMutable

直接已知子类:

MetricMutableCounter, MetricMutableGauge, MetricMutableStat

public abstract class MetricMutable
extends Object

The mutable metric interface

字段概要

字段

限定符和类型	字段和说明
String	description description of the metric
String	name name of the metric

构造器概要

构造器

构造器和说明
MetricMutable(String name, String description) Construct a mutable metric

方法概要

方法

限定符和类型	方法和说明
boolean	changed()
protected void	clearChanged() Clear the changed flag in the snapshot operations
protected void	setChanged() Set the changed flag in mutable operations
void	snapshot(MetricsRecordBuilder builder) Get a sampe/snapshot of metric if changed
abstract void	snapshot(MetricsRecordBuilder builder, boolean all) Get a snapshot/snapshot of the metric

从类继承的方法 java.lang.Object

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

字段详细资料

name

public final String name

name of the metric

description

public final String description

description of the metric

构造器详细资料

MetricMutable

public MetricMutable(String name,
             String description)

Construct a mutable metric

参数:

name - of the metric

description - of the metric

方法详细资料

snapshot

public abstract void snapshot(MetricsRecordBuilder builder,
            boolean all)

Get a snapshot/snapshot of the metric

参数:

builder - the metrics record builder

all - if true, snapshot unchanged metrics as well

snapshot

public void snapshot(MetricsRecordBuilder builder)

Get a sampe/snapshot of metric if changed

参数:

builder - the metrics record builder

setChanged

protected void setChanged()

Set the changed flag in mutable operations

clearChanged

protected void clearChanged()

Clear the changed flag in the snapshot operations

changed

public boolean changed()

返回:

true if metric is changed since last snapshot/snapshot