org.apache.bookkeeper.stats

Interface StatsLogger

All Known Implementing Classes:

CachingStatsLogger, NullStatsLogger

public interface StatsLogger

A simple interface that exposes just 2 useful methods. One to get the logger for an Op stat and another to get the logger for a simple stat

Method Summary

Modifier and Type	Method and Description
Counter	getCounter(java.lang.String name)
OpStatsLogger	getOpStatsLogger(java.lang.String name)
<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.
default StatsLogger	scopeLabel(java.lang.String labelName, java.lang.String labelValue) Provide the stats logger with an attached label.
<T extends java.lang.Number> void	unregisterGauge(java.lang.String name, Gauge<T> gauge) Unregister given gauge from name name.

Method Detail

getOpStatsLogger

OpStatsLogger getOpStatsLogger(java.lang.String name)

Parameters:

name - Stats Name

Returns:

Get the logger for an OpStat described by the name.

getCounter

Counter getCounter(java.lang.String name)

Parameters:

name - Stats Name

Returns:

Get the logger for a simple stat described by the name

registerGauge

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

Register given gauge as name name.

Parameters:

name - gauge name

gauge - gauge function

unregisterGauge

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

Unregister given gauge from name name.

Parameters:

name - name of the gauge

gauge - gauge function

scope

StatsLogger scope(java.lang.String name)

Provide the stats logger under scope name.

Parameters:

name - scope name.

Returns:

stats logger under scope name.

scopeLabel

default StatsLogger scopeLabel(java.lang.String labelName,
                               java.lang.String labelValue)

Provide the stats logger with an attached label.

Parameters:

labelName - the name of the label.

labelValue - the value of the label.

Returns:

stats logger under scope name.

removeScope

void removeScope(java.lang.String name,
                 StatsLogger 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.

Parameters:

name - name of the scope

statsLogger - the stats logger of this scope.