org.apache.bookkeeper.stats

Class CachingStatsLogger

java.lang.Object

org.apache.bookkeeper.stats.CachingStatsLogger

All Implemented Interfaces:

StatsLogger

public class CachingStatsLogger
extends java.lang.Object
implements StatsLogger

A StatsLogger that caches the stats objects created by other StatsLogger.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.ConcurrentMap<java.lang.String,Counter>	counters
protected java.util.concurrent.ConcurrentMap<java.lang.String,OpStatsLogger>	opStatsLoggers
protected java.util.concurrent.ConcurrentMap<java.lang.String,StatsLogger>	scopeStatsLoggers
protected StatsLogger	underlying

Constructor Summary

Constructors

Constructor and Description
CachingStatsLogger(StatsLogger statsLogger)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
Counter	getCounter(java.lang.String name)
OpStatsLogger	getOpStatsLogger(java.lang.String name)
Counter	getThreadScopedCounter(java.lang.String name) Thread-scoped stats not currently supported.
OpStatsLogger	getThreadScopedOpStatsLogger(java.lang.String name) Thread-scoped stats not currently supported.
int	hashCode()
<T extends java.lang.Number> void	registerGauge(java.lang.String name, Gauge<T> gauge) Register given gauge as name name.
void	removeScope(java.lang.String name, StatsLogger statsLogger) Remove the given statsLogger for scope name.
StatsLogger	scope(java.lang.String name) Provide the stats logger under scope name.
java.lang.String	toString()
<T extends java.lang.Number> void	unregisterGauge(java.lang.String name, Gauge<T> gauge) Unregister given gauge from name name.

Methods inherited from class java.lang.Object

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

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

scopeLabel

Field Detail

underlying

protected final StatsLogger underlying

counters

protected final java.util.concurrent.ConcurrentMap<java.lang.String,Counter> counters

opStatsLoggers

protected final java.util.concurrent.ConcurrentMap<java.lang.String,OpStatsLogger> opStatsLoggers

scopeStatsLoggers

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

Constructor Detail

CachingStatsLogger

public CachingStatsLogger(StatsLogger statsLogger)

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getOpStatsLogger

public OpStatsLogger getOpStatsLogger(java.lang.String name)

Specified by:

getOpStatsLogger in interface StatsLogger

Parameters:

name - Stats Name

Returns:

Get the logger for an OpStat described by the name.

getCounter

public Counter getCounter(java.lang.String name)

Specified by:

getCounter in interface StatsLogger

Parameters:

name - Stats Name

Returns:

Get the logger for a simple stat described by the name

registerGauge

public <T extends java.lang.Number> void registerGauge(java.lang.String name,
                                                       Gauge<T> gauge)

Description copied from interface: StatsLogger

Register given gauge as name name.

Specified by:

registerGauge in interface StatsLogger

Parameters:

name - gauge name

gauge - gauge function

unregisterGauge

public <T extends java.lang.Number> void unregisterGauge(java.lang.String name,
                                                         Gauge<T> gauge)

Description copied from interface: StatsLogger

Unregister given gauge from name name.

Specified by:

unregisterGauge in interface StatsLogger

Parameters:

name - name of the gauge

gauge - gauge function

scope

public StatsLogger scope(java.lang.String name)

Description copied from interface: StatsLogger

Provide the stats logger under scope name.

Specified by:

scope in interface StatsLogger

Parameters:

name - scope name.

Returns:

stats logger under scope name.

removeScope

public void removeScope(java.lang.String name,
                        StatsLogger statsLogger)

Description copied from interface: StatsLogger

Remove the given statsLogger for scope name. It can be no-op if the underlying stats provider doesn't have the ability to remove scope.

Specified by:

removeScope in interface StatsLogger

Parameters:

name - name of the scope

statsLogger - the stats logger of this scope.

getThreadScopedOpStatsLogger

public OpStatsLogger getThreadScopedOpStatsLogger(java.lang.String name)

Thread-scoped stats not currently supported.

Specified by:

getThreadScopedOpStatsLogger in interface StatsLogger

Parameters:

name - Stats Name

Returns:

Get the logger for an OpStat described by the name with extra labels for the threadpool/threadname and thread no. Lone threads always have 0 as their thread no.

getThreadScopedCounter

public Counter getThreadScopedCounter(java.lang.String name)

Thread-scoped stats not currently supported.

Specified by:

getThreadScopedCounter in interface StatsLogger

Parameters:

name - Stats Name

Returns:

Get the logger for a simple stat described by the name with extra labels for the threadpool/threadname and thread no. Lone threads always have 0 as their thread no.