org.eclipse.rdf4j.federated.evaluation.join

Class ParallelServiceJoinTask

java.lang.Object

org.eclipse.rdf4j.federated.evaluation.concurrent.ParallelTaskBase<BindingSet>

org.eclipse.rdf4j.federated.evaluation.join.ParallelServiceJoinTask

All Implemented Interfaces:

ParallelTask<BindingSet>

public class ParallelServiceJoinTask
extends ParallelTaskBase<BindingSet>

A task implementation representing the evaluation of a SERVICE which is to be evaluated using block input. See FederationEvalStrategy.evaluateService(FedXService, List) for details.

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field and Description
protected List<BindingSet>	bindings
protected FedXService	expr
protected ParallelExecutor<BindingSet>	joinControl
protected FederationEvalStrategy	strategy

Fields inherited from class org.eclipse.rdf4j.federated.evaluation.concurrent.ParallelTaskBase

scheduledFuture

Constructor Summary

Constructors

Constructor and Description
ParallelServiceJoinTask(ParallelExecutor<BindingSet> joinControl, FederationEvalStrategy strategy, FedXService expr, List<BindingSet> bindings)

Method Summary

Modifier and Type	Method and Description
ParallelExecutor<BindingSet>	getControl() return the controlling instance, e.g.
CloseableIteration<BindingSet,QueryEvaluationException>	performTask()

Methods inherited from class org.eclipse.rdf4j.federated.evaluation.concurrent.ParallelTaskBase

cancel, setScheduledFuture, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.federated.evaluation.concurrent.ParallelTask

getQueryInfo

Field Detail

strategy

protected final FederationEvalStrategy strategy

expr

protected final FedXService expr

bindings

protected final List<BindingSet> bindings

joinControl

protected final ParallelExecutor<BindingSet> joinControl

Constructor Detail

ParallelServiceJoinTask

public ParallelServiceJoinTask(ParallelExecutor<BindingSet> joinControl,
                               FederationEvalStrategy strategy,
                               FedXService expr,
                               List<BindingSet> bindings)

Method Detail

performTask

public CloseableIteration<BindingSet,QueryEvaluationException> performTask()
                                                                    throws Exception

Throws:

Exception

getControl

public ParallelExecutor<BindingSet> getControl()

Description copied from interface: ParallelTask

return the controlling instance, e.g. in most cases the instance of a thread. Shared variables are used to inform the thread about new events.

Returns:

the control executor