Package org.aksw.jenax.dataaccess.sparql.engine

Interface RDFEngine

All Superinterfaces:

AutoCloseable, HasRDFLinkSource

All Known Subinterfaces:

RDFEngineWrapper<X>

All Known Implementing Classes:

DecoratedRDFEngine, RdfDataEngineFromDataset, RDFEngineSimple, RDFEngineWrapperBase, WrappedRDFEngine

public interface RDFEngine
extends HasRDFLinkSource, AutoCloseable

An RDFEngine represents a running database systems. It features an RDFLinkSource to build connections and a AutoCloseable.close() method to shut the system down. The link builder can be cast to specific subclasses in order to configure it. For example, an RDFLinkBuilder that can be cast to an RDFLinkBuilderHTTP supports configuring the content types for each SPARQL query form. RDFDataSource is the abstraction for a factory of readily configured links. Multiple RDF data sources can be created over the same data engine, for example one that retrieves SELECT queries using application/sparql-results-xml and another that uses application/sparql-results+json. RDF data sources can be decorated with various (client-side) transformations, such as macro expansion, result set limit injection, paginated execution and so on. RDFEngineDecorator.

Method Summary

Modifier and Type	Method	Description
Optional<ServiceControl>	getServiceControl()	An engine may optionally expose a way to start and stop the underlying service.

Methods inherited from interface java.lang.AutoCloseable

close

Methods inherited from interface org.aksw.jenax.dataaccess.sparql.linksource.HasRDFLinkSource

getLinkSource

Method Details

getServiceControl

Optional<ServiceControl> getServiceControl()

An engine may optionally expose a way to start and stop the underlying service. Note that only a call to AutoCloseable.close() must guarantee to stop the service and free any resources. Only calling ServiceControl.stop() is generally NOT sufficient.