FederatedServiceResolver (Eclipse RDF4J 4.2.4)

All Known Subinterfaces:

EvaluationStrategy

All Known Implementing Classes:

AbstractFederatedServiceResolver, DelegateFederatedServiceResolver, EvaluationStrategyImpl, ExtendedEvaluationStrategy, FederatedServiceResolverBase, FederationEvalStrategy, LimitedSizeEvaluationStrategy, SailFederationEvalStrategy, SimpleEvaluationStrategy, SparqlFederationEvalStrategy, SPARQLServiceResolver, StrictEvaluationStrategy, TupleFunctionEvaluationStrategy
```
public interface FederatedServiceResolver
```
The FederatedServiceResolver is used to manage a set of FederatedService instances, which are used to evaluate SERVICE expressions for particular service Urls.
Lookup can be done via the serviceUrl using the method getService(String).

Author:

Andreas Schwarte, James Leigh

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`FederatedService`	`getService(String serviceUrl)`	Retrieve the `FederatedService` registered for serviceUrl.

- Method Detail
  - getService
```
FederatedService getService(String serviceUrl)
                     throws QueryEvaluationException
```
    Retrieve the FederatedService registered for serviceUrl. If there is no service registered for serviceUrl, a new SPARQLFederatedService is created and registered.
    
    Parameters:
    
    serviceUrl - locator for the federation service
    
    Returns:
    
    the FederatedService, created fresh if necessary
    
    Throws:
    
    QueryEvaluationException - If there was an exception generated while retrieving the service.