## Uses of Class
org.eclipse.rdf4j.federated.evaluation.concurrent.ParallelTaskBase

- Packages that use ParallelTaskBase
  Package | Description
  --- | ---
  org.eclipse.rdf4j.federated.evaluation.join |
  org.eclipse.rdf4j.federated.evaluation.union |
  org.eclipse.rdf4j.federated.optimizer |

- - ### Uses of ParallelTaskBase in org.eclipse.rdf4j.federated.evaluation.join

    Subclasses of ParallelTaskBase in org.eclipse.rdf4j.federated.evaluation.join
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `ParallelBoundJoinTask` | A task implementation representing a bound join, see `FederationEvalStrategy.evaluateBoundJoinStatementPattern(StatementTupleExpr, List)` for further details on the evaluation process.
    `class` | `ParallelCheckJoinTask` | A task implementation representing a grouped bound check.
    `class` | `ParallelJoinTask` | A task implementation representing a join, i.e.
    `class` | `ParallelLeftJoinTask` | A task implementation representing a join, i.e.
    `class` | `ParallelServiceJoinTask` | A task implementation representing the evaluation of a SERVICE which is to be evaluated using block input.

  - ### Uses of ParallelTaskBase in org.eclipse.rdf4j.federated.evaluation.union

    Subclasses of ParallelTaskBase in org.eclipse.rdf4j.federated.evaluation.union
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `ParallelGetStatementsTask` | A task implementation to retrieve statements for a given `StatementPattern` using the provided triple source.
    `class` | `ParallelPreparedAlgebraUnionTask` | A task implementation representing a prepared union, i.e.
    `class` | `ParallelPreparedUnionTask` | A task implementation representing a prepared union, i.e.
    `class` | `ParallelUnionOperatorTask` | A task implementation representing a UNION operator expression to be evaluated.
    `class` | `ParallelUnionTask` | A task implementation representing a statement expression to be evaluated.

  - ### Uses of ParallelTaskBase in org.eclipse.rdf4j.federated.optimizer

    Subclasses of ParallelTaskBase in org.eclipse.rdf4j.federated.optimizer
    Modifier and Type | Class | Description
    --- | --- | ---
    `protected static class` | `SourceSelection.ParallelCheckTask` | Task for sending an ASK request to the endpoints (for source selection)