org.eclipse.rdf4j.federated.endpoint

Class EndpointFactory

java.lang.Object

org.eclipse.rdf4j.federated.endpoint.EndpointFactory

public class EndpointFactory
extends Object

Utility class providing various methods to create Endpoints to be used as federation members.

Author:

Andreas Schwarte

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	EndpointFactory.DefaultRDFHandler

Constructor Summary

Constructors

Constructor and Description
EndpointFactory()

Method Summary

Modifier and Type	Method and Description
static String	getId(String endpointID, String type) Construct a unique id for the provided SPARQL Endpoint, e.g http://dbpedia.org/ => %type%_dbpedia.org
static Endpoint	loadEndpoint(String id, Repository repository) Load an EndpointBase for a given (configured) Repository.
static List<Endpoint>	loadFederationMembers(File dataConfig, File fedXBaseDir) Utility function to load federation members from a data configuration file.
static List<Endpoint>	loadFederationMembers(Model members, File baseDir) Utility function to load federation members from a model.
static Endpoint	loadNativeEndpoint(File location) Construct a NativeStore endpoint using the provided information and the file location as name.
static Endpoint	loadNativeEndpoint(String name, File location) Construct a NativeStore endpoint using the provided information.
static Endpoint	loadRemoteRepository(String repositoryServer, String repositoryName)
static Endpoint	loadResolvableRepository(String repositoryId) Load a ResolvableEndpoint
static Endpoint	loadSPARQLEndpoint(String endpoint) Construct a SPARQL endpoint using the the provided information and the host of the url as name.
static Endpoint	loadSPARQLEndpoint(String name, String endpoint) Construct a SPARQL endpoint using the the provided information.

Methods inherited from class java.lang.Object

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

Constructor Detail

EndpointFactory

public EndpointFactory()

Method Detail

loadSPARQLEndpoint

public static Endpoint loadSPARQLEndpoint(String name,
                                          String endpoint)
                                   throws FedXException

Construct a SPARQL endpoint using the the provided information.

Parameters:

name - a descriptive name, e.g. http://dbpedia

endpoint - the URL of the SPARQL endpoint, e.g. http://dbpedia.org/sparql

Returns:

an initialized EndpointBase containing the repository

Throws:

Exception

FedXException

loadSPARQLEndpoint

public static Endpoint loadSPARQLEndpoint(String endpoint)
                                   throws FedXException

Construct a SPARQL endpoint using the the provided information and the host of the url as name.

Parameters:

endpoint - the URL of the SPARQL endpoint, e.g. http://dbpedia.org/sparql

Returns:

an initialized EndpointBase containing the repository

Throws:

FedXException

loadRemoteRepository

public static Endpoint loadRemoteRepository(String repositoryServer,
                                            String repositoryName)
                                     throws FedXException

Throws:

FedXException

loadResolvableRepository

public static Endpoint loadResolvableRepository(String repositoryId)

Load a ResolvableEndpoint

The federation must be initialized with a RepositoryResolver ( see FedXFactory.withRepositoryResolver(RepositoryResolver)) and this resolver must offer a Repository with the id provided by Endpoint.getId()

Note that the name is set to "http://" + repositoryId

Parameters:

repositoryId - the repository identifier

Returns:

the configured Endpoint

See Also:

ResolvableRepositoryProvider, ResolvableRepositoryInformation

loadEndpoint

public static Endpoint loadEndpoint(String id,
                                    Repository repository)
                             throws FedXException

Load an EndpointBase for a given (configured) Repository.

Note that EndpointType is set to EndpointType.Other

If the repository is already initialized, it is assumed that the lifecycle is managed externally. Otherwise, FedX will make sure to take care for the lifecycle of the repository, i.e. initialize and shutdown.

Parameters:

id - the identifier, e.g. "myRepository"

repository - the constructed repository

Returns:

the initialized endpoint

Throws:

FedXException

loadNativeEndpoint

public static Endpoint loadNativeEndpoint(String name,
                                          File location)
                                   throws FedXException

Construct a NativeStore endpoint using the provided information.

If the repository location denotes an absolute path, the native store directory must already exist. If a relative path is used, the repository is created on the fly (if necessary).

Parameters:

name - a descriptive name, e.g. http://dbpedia

location - the location of the data store, either absolute or relative in a "repositories" subfolder SailRepository.getDataDir()

Returns:

an initialized endpoint containing the repository

Throws:

Exception

FedXException

loadNativeEndpoint

public static Endpoint loadNativeEndpoint(File location)
                                   throws FedXException

Construct a NativeStore endpoint using the provided information and the file location as name.

If the repository location denotes an absolute path, the native store directory must already exist. If a relative path is used, the repository is created on the fly (if necessary).

Parameters:

location - the location of the data store

Returns:

an initialized endpoint containing the repository

Throws:

Exception

FedXException

loadFederationMembers

public static List<Endpoint> loadFederationMembers(File dataConfig,
                                                   File fedXBaseDir)
                                            throws FedXException

Utility function to load federation members from a data configuration file.

A data configuration file provides information about federation members in form of turtle. Currently the types NativeStore, ResolvableEndpoint and SPARQLEndpoint are supported. For details please refer to the documentation in NativeRepositoryInformation, ResolvableRepositoryInformation and SPARQLRepositoryInformation.

Parameters:

dataConfig -

Returns:

a list of initialized endpoints, i.e. the federation members

Throws:

IOException

Exception

FedXException

loadFederationMembers

public static List<Endpoint> loadFederationMembers(Model members,
                                                   File baseDir)
                                            throws FedXException

Utility function to load federation members from a model.

Currently the types NativeStore, ResolvableEndpoint and SPARQLEndpoint are supported. For details please refer to the documentation in NativeRepositoryInformation, ResolvableRepositoryInformation and SPARQLRepositoryInformation.

Parameters:

members -

baseDir -

Returns:

list of endpoints

Throws:

FedXException

getId

public static String getId(String endpointID,
                           String type)

Construct a unique id for the provided SPARQL Endpoint, e.g http://dbpedia.org/ => %type%_dbpedia.org

Parameters:

endpointID -

type - the repository type, e.g. native, sparql, etc

Returns:

the ID for the SPARQL endpoint