com.bigdata.rdf.sparql.ast.service

Interface IServiceOptions

All Known Subinterfaces:

INativeServiceOptions

All Known Implementing Classes:

BigdataNativeServiceOptions, OpenrdfNativeServiceOptions, RemoteServiceOptions, ServiceOptionsBase

public interface IServiceOptions

Options and metadata for service end points.

Author:

Bryan Thompson

Method Summary

Methods

Modifier and Type	Method and Description
SPARQLVersion	getSPARQLVersion() Returns if SPARQLVersion.SPARQL_11 iff the end point supports SPARQL 1.1.
boolean	isBigdataLBS() Return true if the remote service is known to be a bigdata service that exposes the HA load balancer servlet (default false).
boolean	isBigdataNativeService() Return true iff the service is a native (aka "bigdata" aware) internal service.
boolean	isRemoteService() Return true iff the service is "remote".
boolean	isRunFirst() Return true iff the service end point is one which should always be run as early as possible within the join group (default false).
boolean	isSparql10() Return true iff the end point supports SPARQL 1.0

Method Detail

isBigdataNativeService

boolean isBigdataNativeService()

Return true iff the service is a native (aka "bigdata" aware) internal service. When true, the ServiceCall implementation is expected to exchange IBindingSets containing IVs and those IVs are NOT guaranteed to be materialized. When false, the service is expected to exchange BindingSets containing materialized RDF Values.

isRemoteService

boolean isRemoteService()

Return true iff the service is "remote". A remote service is one where we must generate and send a SPARQL query. A local service is one where the ServiceNode.getGraphPattern() may be directly evaluated by the service implementation.

isSparql10

boolean isSparql10()

Return true iff the end point supports SPARQL 1.0

isRunFirst

boolean isRunFirst()

Return true iff the service end point is one which should always be run as early as possible within the join group (default false).

Note: This option is only obeyed when the SERVICE reference is a constant. If the SERVICE reference is a variable, then it is not possible to resolve the IServiceOptions for that SERVICE until after the query planner has locked in the join evaluation order.

isBigdataLBS

boolean isBigdataLBS()

Return true if the remote service is known to be a bigdata service that exposes the HA load balancer servlet (default false). The default may be overridden iff the end point is known to expose the bigdata LBS pattern.

getSPARQLVersion

SPARQLVersion getSPARQLVersion()

Returns if SPARQLVersion.SPARQL_11 iff the end point supports SPARQL 1.1. When SPARQLVersion.SPARQL_10, the solutions will be vectored to the end point using a technique which is compatible with SPARQL 1.0.

Returns:

the SPARQL version SPARQLVersion