Package org.apache.hadoop.fs.statistics

Interface IOStatisticsAggregator

All Known Subinterfaces:

IOStatisticsStore

All Known Implementing Classes:

ForwardingIOStatisticsStore, IOStatisticsSnapshot

@Public
@Evolving
public interface IOStatisticsAggregator

Interface exported by classes which support aggregation of IOStatistics. Implementations MAY aggregate all statistics exported by the IOStatistics reference passed in to aggregate(IOStatistics), or they may selectively aggregate specific values/classes of statistics.

Method Summary

Modifier and Type	Method	Description
boolean	aggregate(IOStatistics statistics)	Aggregate the supplied statistics into the current set.

Method Detail

aggregate

boolean aggregate(@Nullable
                  IOStatistics statistics)

Aggregate the supplied statistics into the current set.

Parameters:

statistics - statistics; may be null

Returns:

true if the statistics reference was not null and so aggregated.