Package org.apache.hadoop.metrics2

Class MetricsTag

java.lang.Object

org.apache.hadoop.metrics2.MetricsTag

All Implemented Interfaces:

MetricsInfo

@Public
@Evolving
public class MetricsTag
extends Object
implements MetricsInfo

Immutable tag for metrics (for grouping on host/queue/username etc.)

Constructor Summary

Constructors

Constructor	Description
MetricsTag(MetricsInfo info, String value)	Construct the tag with name, description and value

Method Summary

Modifier and Type	Method	Description
String	description()	Typically the description corresponds to annotation Metric.about() or the name of the class.
boolean	equals(Object obj)
int	hashCode()
MetricsInfo	info()
String	name()	Typically name corresponds to annotation Metric.value() or the name of the class.
String	toString()
String	value()	Get the value of the tag

Methods inherited from class java.lang.Object

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

Constructor Details

MetricsTag

public MetricsTag(MetricsInfo info,
 String value)

Construct the tag with name, description and value

Parameters:

info - of the tag

value - of the tag

Method Details

name

public String name()

Description copied from interface: MetricsInfo

Typically name corresponds to annotation Metric.value() or the name of the class.

Specified by:

name in interface MetricsInfo

Returns:

the name of the metric/tag

description

public String description()

Description copied from interface: MetricsInfo

Typically the description corresponds to annotation Metric.about() or the name of the class.

Specified by:

description in interface MetricsInfo

Returns:

the description of the metric/tag

info

public MetricsInfo info()

Returns:

the info object of the tag

value

public String value()

Get the value of the tag

Returns:

the value

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object