Package org.apache.bookkeeper.stats

Class CachingStatsProvider

java.lang.Object

org.apache.bookkeeper.stats.CachingStatsProvider

All Implemented Interfaces:

StatsProvider

public class CachingStatsProvider
extends 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	Description
protected final ConcurrentMap<String,StatsLogger>	statsLoggers
protected final StatsProvider	underlying

Constructor Summary

Constructors

Constructor	Description
CachingStatsProvider(StatsProvider provider)

Method Summary

Modifier and Type	Method	Description
StatsLogger	getStatsLogger(String scope)	Return the stats logger to a given scope.
String	getStatsName(String... statsComponents)	Return the fully qualified stats name comprised of given statsComponents.
void	start(org.apache.commons.configuration2.Configuration conf)	Initialize 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 Details

underlying

protected final StatsProvider underlying

statsLoggers

protected final ConcurrentMap<String,StatsLogger> statsLoggers

Constructor Details

CachingStatsProvider

public CachingStatsProvider(StatsProvider provider)

Method Details

start

public void start(org.apache.commons.configuration2.Configuration conf)

Description copied from interface: StatsProvider

Initialize 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(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 String getStatsName(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