org.eclipse.rdf4j.federated.evaluation.union

Class ParallelPreparedAlgebraUnionTask

java.lang.Object

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

org.eclipse.rdf4j.federated.evaluation.union.ParallelPreparedAlgebraUnionTask

All Implemented Interfaces:

ParallelTask<BindingSet>

public class ParallelPreparedAlgebraUnionTask
extends ParallelTaskBase<BindingSet>

A task implementation representing a prepared union, i.e. the prepared query is executed on the provided triple source.

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field and Description
protected BindingSet	bindings
protected Endpoint	endpoint
protected FilterValueExpr	filterExpr
protected TupleExpr	preparedQuery
protected QueryInfo	queryInfo
protected ParallelExecutor<BindingSet>	unionControl

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

scheduledFuture

Constructor Summary

Constructors

Constructor and Description
ParallelPreparedAlgebraUnionTask(ParallelExecutor<BindingSet> unionControl, TupleExpr preparedQuery, Endpoint endpoint, BindingSet bindings, FilterValueExpr filterExpr, QueryInfo queryInfo)

Method Summary

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

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

cancel, setScheduledFuture

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

endpoint

protected final Endpoint endpoint

preparedQuery

protected final TupleExpr preparedQuery

bindings

protected final BindingSet bindings

unionControl

protected final ParallelExecutor<BindingSet> unionControl

filterExpr

protected final FilterValueExpr filterExpr

queryInfo

protected final QueryInfo queryInfo

Constructor Detail

ParallelPreparedAlgebraUnionTask

public ParallelPreparedAlgebraUnionTask(ParallelExecutor<BindingSet> unionControl,
                                        TupleExpr preparedQuery,
                                        Endpoint endpoint,
                                        BindingSet bindings,
                                        FilterValueExpr filterExpr,
                                        QueryInfo queryInfo)

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

toString

public String toString()

Overrides:

toString in class ParallelTaskBase<BindingSet>