org.apache.zookeeper.metrics.impl

Class NullMetricsProvider.NullMetricsContext

java.lang.Object

org.apache.zookeeper.metrics.impl.NullMetricsProvider.NullMetricsContext

All Implemented Interfaces:

MetricsContext

Enclosing class:

NullMetricsProvider

public static final class NullMetricsProvider.NullMetricsContext
extends Object
implements MetricsContext

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.zookeeper.metrics.MetricsContext

MetricsContext.DetailLevel

Field Summary

Fields

Modifier and Type	Field and Description
static NullMetricsProvider.NullMetricsContext	INSTANCE

Constructor Summary

Constructors

Constructor and Description
NullMetricsContext()

Method Summary

Modifier and Type	Method and Description
MetricsContext	getContext(String name) Returns a sub context.
Counter	getCounter(String name) Returns a counter.
Summary	getSummary(String name, MetricsContext.DetailLevel detailLevel) Returns a summary.
SummarySet	getSummarySet(String name, MetricsContext.DetailLevel detailLevel) Returns a set of summaries.
void	registerGauge(String name, Gauge gauge) Registers an user provided Gauge which will be called by the MetricsProvider in order to sample an integer value.
void	unregisterGauge(String name) Unregisters the user provided Gauge bound to the given name.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final NullMetricsProvider.NullMetricsContext INSTANCE

Constructor Detail

NullMetricsContext

public NullMetricsContext()

Method Detail

getContext

public MetricsContext getContext(String name)

Description copied from interface: MetricsContext

Returns a sub context.

Specified by:

getContext in interface MetricsContext

Parameters:

name - the name of the subcontext

Returns:

a new metrics context.

getCounter

public Counter getCounter(String name)

Description copied from interface: MetricsContext

Returns a counter.

Specified by:

getCounter in interface MetricsContext

Returns:

the counter identified by name in this context.

registerGauge

public void registerGauge(String name,
                          Gauge gauge)

Description copied from interface: MetricsContext

Registers an user provided Gauge which will be called by the MetricsProvider in order to sample an integer value. If another Gauge was already registered the new one will take its place. Registering a null callback is not allowed.

Specified by:

registerGauge in interface MetricsContext

Parameters:

name - unique name of the Gauge in this context

gauge - the implementation of the Gauge

unregisterGauge

public void unregisterGauge(String name)

Description copied from interface: MetricsContext

Unregisters the user provided Gauge bound to the given name.

Specified by:

unregisterGauge in interface MetricsContext

Parameters:

name - unique name of the Gauge in this context

getSummary

public Summary getSummary(String name,
                          MetricsContext.DetailLevel detailLevel)

Description copied from interface: MetricsContext

Returns a summary.

Specified by:

getSummary in interface MetricsContext

Returns:

the summary identified by name in this context.

getSummarySet

public SummarySet getSummarySet(String name,
                                MetricsContext.DetailLevel detailLevel)

Description copied from interface: MetricsContext

Returns a set of summaries.

Specified by:

getSummarySet in interface MetricsContext

Returns:

the summary identified by name in this context.