ParallelTask (Eclipse RDF4J 4.2.4)

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

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`cancel()`	Optional implementation to cancel this task on a best effort basis
`default void`	`close()`	Optional implementation to close 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
  - close
```
default void close()
```
    Optional implementation to close this task on a best effort basis.