org.apache.hadoop.hbase.metrics

Class Interns

java.lang.Object

org.apache.hadoop.hbase.metrics.Interns

@InterfaceAudience.Private
 @InterfaceStability.Evolving
public final class Interns
extends Object

Helpers to create interned metrics info

Field Summary

Fields

Modifier and Type	Field and Description
private static org.apache.hbase.thirdparty.com.google.common.cache.LoadingCache<String,ConcurrentHashMap<String,org.apache.hadoop.metrics2.MetricsInfo>>	infoCache
private static org.apache.hbase.thirdparty.com.google.common.cache.LoadingCache<org.apache.hadoop.metrics2.MetricsInfo,ConcurrentHashMap<String,org.apache.hadoop.metrics2.MetricsTag>>	tagCache

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Interns()

Method Summary

Modifier and Type	Method and Description
static org.apache.hadoop.metrics2.MetricsInfo	info(String name, String description) Get a metric info object
static org.apache.hadoop.metrics2.MetricsTag	tag(org.apache.hadoop.metrics2.MetricsInfo info, String value) Get a metrics tag
static org.apache.hadoop.metrics2.MetricsTag	tag(String name, String description, String value) Get a metrics tag

Methods inherited from class java.lang.Object

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

Field Detail

infoCache

private static org.apache.hbase.thirdparty.com.google.common.cache.LoadingCache<String,ConcurrentHashMap<String,org.apache.hadoop.metrics2.MetricsInfo>> infoCache

tagCache

private static org.apache.hbase.thirdparty.com.google.common.cache.LoadingCache<org.apache.hadoop.metrics2.MetricsInfo,ConcurrentHashMap<String,org.apache.hadoop.metrics2.MetricsTag>> tagCache

Constructor Detail

Interns

private Interns()

Method Detail

info

public static org.apache.hadoop.metrics2.MetricsInfo info(String name,
                                                          String description)

Get a metric info object

Returns:

an interned metric info object

tag

public static org.apache.hadoop.metrics2.MetricsTag tag(org.apache.hadoop.metrics2.MetricsInfo info,
                                                        String value)

Get a metrics tag

Parameters:

info - of the tag

value - of the tag

Returns:

an interned metrics tag

tag

public static org.apache.hadoop.metrics2.MetricsTag tag(String name,
                                                        String description,
                                                        String value)

Get a metrics tag

Parameters:

name - of the tag

description - of the tag

value - of the tag

Returns:

an interned metrics tag