org.apache.bookkeeper.stats

Class CachingStatsProvider

java.lang.Object

org.apache.bookkeeper.stats.CachingStatsProvider

All Implemented Interfaces:

StatsProvider

public class CachingStatsProvider
extends java.lang.Object
implements StatsProvider

A CachingStatsProvider adds the caching functionality to an existing StatsProvider.

The stats provider will cache the stats objects created by the other StatsProvider to allow the reusability of stats objects and avoid creating a lot of stats objects.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.ConcurrentMap<java.lang.String,StatsLogger>	statsLoggers
protected StatsProvider	underlying

Constructor Summary

Constructors

Constructor and Description
CachingStatsProvider(StatsProvider provider)

Method Summary

Modifier and Type	Method and Description
StatsLogger	getStatsLogger(java.lang.String scope) Return the stats logger to a given scope.
java.lang.String	getStatsName(java.lang.String... statsComponents) Return the fully qualified stats name comprised of given statsComponents.
void	start(org.apache.commons.configuration.Configuration conf) Intialize the stats provider by loading the given configuration conf.
void	stop() Close the stats provider.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.bookkeeper.stats.StatsProvider

writeAllMetrics

Field Detail

underlying

protected final StatsProvider underlying

statsLoggers

protected final java.util.concurrent.ConcurrentMap<java.lang.String,StatsLogger> statsLoggers

Constructor Detail

CachingStatsProvider

public CachingStatsProvider(StatsProvider provider)

Method Detail

start

public void start(org.apache.commons.configuration.Configuration conf)

Description copied from interface: StatsProvider

Intialize the stats provider by loading the given configuration conf.

Specified by:

start in interface StatsProvider

Parameters:

conf - Configuration to configure the stats provider.

stop

public void stop()

Description copied from interface: StatsProvider

Close the stats provider.

Specified by:

stop in interface StatsProvider

getStatsLogger

public StatsLogger getStatsLogger(java.lang.String scope)

Description copied from interface: StatsProvider

Return the stats logger to a given scope.

Specified by:

getStatsLogger in interface StatsProvider

Parameters:

scope - Scope for the given stats

Returns:

stats logger for the given scope

getStatsName

public java.lang.String getStatsName(java.lang.String... statsComponents)

Description copied from interface: StatsProvider

Return the fully qualified stats name comprised of given statsComponents.

Specified by:

getStatsName in interface StatsProvider

Parameters:

statsComponents - stats components to comprise the fully qualified stats name

Returns:

the fully qualified stats name