com.hazelcast.map.impl.query

Class ParallelAccumulationExecutor

java.lang.Object

com.hazelcast.map.impl.query.ParallelAccumulationExecutor

All Implemented Interfaces:

AccumulationExecutor

public class ParallelAccumulationExecutor
extends Object
implements AccumulationExecutor

Implementation of the AccumulationExecutor that runs the accumulation in a multi-threaded way. Entries are split into chunks and each chunk is sent as a task to the underlying executor. At the end the result is merged to a single AggregationResult.

Constructor Summary

Constructors

Constructor and Description
ParallelAccumulationExecutor(ManagedExecutorService executor, SerializationService serializationService, int callTimeoutInMillis)

Method Summary

Modifier and Type	Method and Description
protected Collection<Aggregator>	accumulateParallel(Aggregator aggregator, Collection<QueryableEntry> entries)
AggregationResult	execute(Aggregator aggregator, Collection<QueryableEntry> entries, Collection<Integer> partitionIds)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ParallelAccumulationExecutor

public ParallelAccumulationExecutor(ManagedExecutorService executor,
                                    SerializationService serializationService,
                                    int callTimeoutInMillis)

Method Detail

execute

public AggregationResult execute(Aggregator aggregator,
                                 Collection<QueryableEntry> entries,
                                 Collection<Integer> partitionIds)

Specified by:

execute in interface AccumulationExecutor

Parameters:

aggregator - Instance of aggregator using which the entries should be accumulated (it will not be modified)

entries - Entries to be accumulated

partitionIds - IDs of the partitions where the entries reside

Returns:

AggregationResult encompassing the result aggregator

accumulateParallel

protected Collection<Aggregator> accumulateParallel(Aggregator aggregator,
                                                    Collection<QueryableEntry> entries)