org.openrdf.query.algebra.evaluation.federation

Class FederatedServiceResolverImpl

java.lang.Object

org.openrdf.query.algebra.evaluation.federation.FederatedServiceResolverBase

org.openrdf.query.algebra.evaluation.federation.FederatedServiceResolverImpl

All Implemented Interfaces:

HttpClientDependent, SesameClientDependent, FederatedServiceResolver

public class FederatedServiceResolverImpl
extends FederatedServiceResolverBase
implements FederatedServiceResolver, HttpClientDependent, SesameClientDependent

The FederatedServiceResolverImpl 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 FederatedServiceResolverBase.getService(String). If there is no service for the specified url, a SPARQLFederatedService is created and registered for future use.

Author:

Andreas Schwarte, James Leigh

Field Summary

Fields inherited from class org.openrdf.query.algebra.evaluation.federation.FederatedServiceResolverBase

endpointToService

Constructor Summary

Constructors

Constructor and Description
FederatedServiceResolverImpl()

Method Summary

Modifier and Type	Method and Description
protected FederatedService	createService(String serviceUrl) Create a new FederatedService for the given serviceUrl.
org.apache.http.client.HttpClient	getHttpClient() HttpClient that has been assigned or has been used by this object.
SesameClient	getSesameClient() SesameClient that has been assigned or has been used by this object.
void	setHttpClient(org.apache.http.client.HttpClient httpClient) Assign an HttpClient that this object should use.
void	setSesameClient(SesameClient client) Assign an SesameClient that this object should use.
void	shutDown()

Methods inherited from class org.openrdf.query.algebra.evaluation.federation.FederatedServiceResolverBase

getService, registerService, unregisterAll, unregisterService

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.query.algebra.evaluation.federation.FederatedServiceResolver

getService

Constructor Detail

FederatedServiceResolverImpl

public FederatedServiceResolverImpl()

Method Detail

getSesameClient

public SesameClient getSesameClient()

Description copied from interface: SesameClientDependent

SesameClient that has been assigned or has been used by this object. The life cycle might not be or might be tied to this object, depending on whether SesameClient was passed to or created by this object respectively.

Specified by:

getSesameClient in interface SesameClientDependent

Returns:

a SesameClient instance or null

setSesameClient

public void setSesameClient(SesameClient client)

Description copied from interface: SesameClientDependent

Assign an SesameClient that this object should use. The life cycle of the given SesameClient is independent of this object. Closing or shutting down this object does not have any impact on the given client. Callers must ensure that the given client is properly closed elsewhere.

Specified by:

setSesameClient in interface SesameClientDependent

getHttpClient

public org.apache.http.client.HttpClient getHttpClient()

Description copied from interface: HttpClientDependent

HttpClient that has been assigned or has been used by this object. The life cycle might not be or might be tied to this object, depending on whether HttpClient was passed to or created by this object respectively.

Specified by:

getHttpClient in interface HttpClientDependent

Returns:

an HttpClient instance or null

setHttpClient

public void setHttpClient(org.apache.http.client.HttpClient httpClient)

Description copied from interface: HttpClientDependent

Assign an HttpClient that this object should use. The life cycle of the given HttpClient is independent of this object. Closing or shutting down this object does not have any impact on the given client. Callers must ensure that the given client is properly closed elsewhere.

Specified by:

setHttpClient in interface HttpClientDependent

createService

protected FederatedService createService(String serviceUrl)
                                  throws QueryEvaluationException

Description copied from class: FederatedServiceResolverBase

Create a new FederatedService for the given serviceUrl. This method is invoked, if no FederatedService has been created yet for the serviceUrl.

Specified by:

createService in class FederatedServiceResolverBase

Parameters:

serviceUrl - the service IRI

Returns:

a non-null FederatedService

Throws:

QueryEvaluationException

shutDown

public void shutDown()

Overrides:

shutDown in class FederatedServiceResolverBase