@LimitedPrivate("Filesystems") @Unstable

Package org.apache.hadoop.fs.statistics.impl

Implementation support for statistics. For use internally; external filesystems MAY use this if the implementors accept that it is unstable and that incompatible changes may take place over minor point releases.

Interface Summary

Interface	Description
IOStatisticsStore	Interface of an IOStatistics store intended for use in classes which track statistics for reporting.
IOStatisticsStoreBuilder	Builder of the IOStatisticsStore implementation.

Class Summary

Class	Description
AbstractIOStatisticsImpl	Base implementation in case common methods/fields need to be added in future.
DynamicIOStatisticsBuilder	Builder of DynamicIOStatistics.
ForwardingIOStatisticsStore	This may seem odd having an IOStatisticsStore which does nothing but forward to a wrapped store, but it's designed to assist in subclassing of selective methods, such as those to increment counters, get durations etc.
IOStatisticsBinding	Support for implementing IOStatistics interfaces.
IOStatisticsContextImpl	Implementing the IOStatisticsContext.
IOStatisticsContextIntegration	A Utility class for IOStatisticsContext, which helps in creating and getting the current active context.
SourceWrappedStatistics	Wrap a statistics instance with an IOStatisticsSource instance which will then serve up the statistics when asked.
StatisticDurationTracker	Track the duration of an object.
StorageStatisticsFromIOStatistics	Returns all the counters of an IOStatistics instance as StorageStatistics.
StubDurationTracker	A simple stub duration tracker which can be issued in interfaces and other places where full duration tracking is not implemented.
StubDurationTrackerFactory	This is a stub factory which always returns no-op duration trackers.
WrappedIOStatistics	Wrap IOStatistics source with another (dynamic) wrapper.