org.eclipse.rdf4j.federated.evaluation.concurrent

Interface ParallelTask<T>

All Known Implementing Classes:

ParallelBoundJoinTask, ParallelCheckJoinTask, ParallelGetStatementsTask, ParallelJoinTask, ParallelLeftJoinTask, ParallelPreparedAlgebraUnionTask, ParallelPreparedUnionTask, ParallelServiceJoinTask, ParallelTaskBase, ParallelUnionOperatorTask, ParallelUnionTask, SourceSelection.ParallelCheckTask

public interface ParallelTask<T>

Interface for any parallel task that can be performed in Scheduler implementations.

Author:

Andreas Schwarte

Method Summary

Modifier and Type	Method and Description
void	cancel() Optional implementation to cancel this task on a best effort basis
ParallelExecutor<T>	getControl() return the controlling instance, e.g.
default QueryInfo	getQueryInfo()
CloseableIteration<T,QueryEvaluationException>	performTask()

Method Detail

performTask

CloseableIteration<T,QueryEvaluationException> performTask()
                                                    throws Exception

Throws:

Exception

getControl

ParallelExecutor<T> getControl()

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

getQueryInfo

default QueryInfo getQueryInfo()

Returns:

the QueryInfo

cancel

void cancel()

Optional implementation to cancel this task on a best effort basis