Package org.eclipse.rdf4j.federated.evaluation.union

Class ParallelGetStatementsTask

java.lang.Object

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

org.eclipse.rdf4j.federated.evaluation.union.ParallelGetStatementsTask

All Implemented Interfaces:

ParallelTask<Statement>

public class ParallelGetStatementsTask
extends ParallelTaskBase<Statement>

A task implementation to retrieve statements for a given StatementPattern using the provided triple source.

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field	Description
protected Resource[]	contexts
protected Endpoint	endpoint
protected Value	obj
protected IRI	pred
protected QueryInfo	queryInfo
protected Resource	subj
protected ParallelExecutor<Statement>	unionControl

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

scheduledFuture

Constructor Summary

Constructors

Constructor	Description
ParallelGetStatementsTask(ParallelExecutor<Statement> unionControl, Endpoint endpoint, Resource subj, IRI pred, Value obj, QueryInfo queryInfo, Resource... contexts)

Method Summary

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

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

cancel, performTask, 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 Details

unionControl

protected final ParallelExecutor<Statement> unionControl

endpoint

protected final Endpoint endpoint

subj

protected final Resource subj

pred

protected final IRI pred

obj

protected final Value obj

queryInfo

protected final QueryInfo queryInfo

contexts

protected Resource[] contexts

Constructor Details

ParallelGetStatementsTask

public ParallelGetStatementsTask(ParallelExecutor<Statement> unionControl,
 Endpoint endpoint,
 Resource subj,
 IRI pred,
 Value obj,
 QueryInfo queryInfo,
 Resource... contexts)

Method Details

getControl

public ParallelExecutor<Statement> 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

performTaskInternal

protected CloseableIteration<Statement,QueryEvaluationException> performTaskInternal()
                                                                              throws Exception

Specified by:

performTaskInternal in class ParallelTaskBase<Statement>

Throws:

Exception