Package org.apache.bookkeeper.stats

A lightweight stats library implemention based on Codahale metrics library.

Interface Summary

Interface	Description
Counter	Simple stats that require only increment and decrement functions on a Long.
Gauge<T extends java.lang.Number>	A guage is a value that has only one value at a specific point in time.
OpStatsLogger	This interface handles logging of statistics related to each operation.
StatsLogger	A simple interface that exposes just 2 useful methods.
StatsProvider	Provider to provide stats logger for different scopes.

Class Summary

Class	Description
AlertStatsLogger	This class is used to raise alert when we detect an event that should never happen in production.
CachingStatsLogger	A StatsLogger that caches the stats objects created by other StatsLogger.
CachingStatsProvider	A CachingStatsProvider adds the caching functionality to an existing StatsProvider.
NullStatsLogger	A no-op StatsLogger.
NullStatsLogger.NullCounter	A no-op Counter.
NullStatsLogger.NullOpStatsLogger	A no-op OpStatsLogger.
NullStatsProvider	A no-op stats provider implementation.
OpStatsData	This class provides a read view of operation specific stats.
Stats	An umbrella class for loading stats provider.
ThreadRegistry	For mapping thread ids to thread pools and threads within those pools or just for lone named threads.
ThreadRegistry.ThreadPoolThread	Stores the thread pool and ordinal.