com.bigdata.btree.proc

Interface IResultHandler<R,A>

Type Parameters:

R - The type of the result from applying the procedure to a single key-range (or Split} of data.

A - The type of the aggregated result.

All Known Subinterfaces:

IAsyncResultHandler<R,A,O,X>

All Known Implementing Classes:

AbstractKeyArrayIndexProcedure.ResultBitBufferCounter, AbstractKeyArrayIndexProcedure.ResultBitBufferHandler, AbstractKeyArrayIndexProcedure.ResultBufferHandler, AbstractLocalSplitResultAggregator, BooleanORAggregator, IdentityHandler, IntegerAggregator, ListResultAggregator, LongAggregator, NopAggregator

public interface IResultHandler<R,A>

An interface for handling results obtained when an IIndexProcedure is parallelized across either a local index or partitions of a scale-out index.

Author:

Bryan Thompson

See Also:

(Schedule more IOs when loading data)

Method Summary

Methods

Modifier and Type	Method and Description
void	aggregate(R result, Split split) Method is invoked for each result and is responsible for combining the results in whatever manner is meaningful for the procedure.
A	getResult() Return the aggregated results as an implementation dependent object.

Method Detail

aggregate

void aggregate(R result,
             Split split)

Method is invoked for each result and is responsible for combining the results in whatever manner is meaningful for the procedure. Implementations of this method MUST be thread-safe since the procedure MAY be applied in parallel when it spans more than one index partition.

Parameters:

result - The result from applying the procedure to a single index partition.

split - The Split that generated that result.

getResult

A getResult()

Return the aggregated results as an implementation dependent object.