Class FederationEvaluationStrategyFactory

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.impl.AbstractEvaluationStrategyFactory

org.eclipse.rdf4j.query.algebra.evaluation.impl.StrictEvaluationStrategyFactory

org.eclipse.rdf4j.federated.evaluation.FederationEvaluationStrategyFactory

All Implemented Interfaces:

EvaluationStrategyFactory, FederatedServiceResolverClient

public class FederationEvaluationStrategyFactory
extends StrictEvaluationStrategyFactory

Factory class for retrieving the FederationEvalStrategy to be used.

Default strategies:

• local federation: SailFederationEvalStrategy
• endpoint federation: SparqlFederationEvalStrategy
• hybrid federation: SparqlFederationEvalStrategy

Customized strategies can be supplied to the federation using FedXFactory.withFederationEvaluationStrategyFactory(FederationEvaluationStrategyFactory)

Author:

Andreas Schwarte

Field Summary

Fields inherited from class StrictEvaluationStrategyFactory

collectionFactorySupplier

Constructor Summary

Constructors

Constructor	Description
FederationEvaluationStrategyFactory()

Method Summary

Modifier and Type	Method	Description
FederationEvalStrategy	createEvaluationStrategy(Dataset dataset, TripleSource tripleSource, EvaluationStatistics evaluationStatistics)	Create the FederationEvalStrategy to be used.
FederationContext	getFederationContext()
FederationManager.FederationType	getFederationType()
void	setFederationContext(FederationContext federationContext)
void	setFederationType(FederationManager.FederationType federationType)

Methods inherited from class StrictEvaluationStrategyFactory

getFederatedServiceResolver, setCollectionFactory, setFederatedServiceResolver

Methods inherited from class AbstractEvaluationStrategyFactory

getOptimizerPipeline, getQuerySolutionCacheThreshold, isTrackResultSize, setOptimizerPipeline, setQuerySolutionCacheThreshold, setTrackResultSize

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FederationEvaluationStrategyFactory

public FederationEvaluationStrategyFactory()

Method Details

getFederationType

public FederationManager.FederationType getFederationType()

setFederationType

public void setFederationType(FederationManager.FederationType federationType)

getFederationContext

public FederationContext getFederationContext()

setFederationContext

public void setFederationContext(FederationContext federationContext)

createEvaluationStrategy

public FederationEvalStrategy createEvaluationStrategy(Dataset dataset,
 TripleSource tripleSource,
 EvaluationStatistics evaluationStatistics)

Create the FederationEvalStrategy to be used. Note: all parameters may be null

Specified by:

createEvaluationStrategy in interface EvaluationStrategyFactory

Overrides:

createEvaluationStrategy in class StrictEvaluationStrategyFactory

Parameters:

dataset - the DataSet to evaluate queries against.

tripleSource - the TripleSource to evaluate queries against.

evaluationStatistics - the store evaluation statistics to use for query optimization.

Returns:

an EvaluationStrategy.