org.eclipse.rdf4j.federated.cache

Class CacheUtils

java.lang.Object

org.eclipse.rdf4j.federated.cache.CacheUtils

public class CacheUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
CacheUtils()

Method Summary

Modifier and Type	Method and Description
static List<StatementSource>	checkCacheForStatementSourcesUpdateCache(SourceSelectionCache cache, List<Endpoint> endpoints, Resource subj, IRI pred, Value obj, QueryInfo queryInfo) Checks the cache for relevant statement sources to the provided statement.
static boolean	checkCacheUpdateCache(SourceSelectionCache cache, List<Endpoint> endpoints, Resource subj, IRI pred, Value obj, QueryInfo queryInfo) Checks the cache if some endpoint can provide results to the subquery.

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheUtils

public CacheUtils()

Method Detail

checkCacheUpdateCache

public static boolean checkCacheUpdateCache(SourceSelectionCache cache,
                                            List<Endpoint> endpoints,
                                            Resource subj,
                                            IRI pred,
                                            Value obj,
                                            QueryInfo queryInfo)

Checks the cache if some endpoint can provide results to the subquery. If the cache has no knowledge a remote ask query is performed and the cache is updated with appropriate information.

Parameters:

cache -

endpoints -

subj -

pred -

obj -

Returns:

whether some endpoint can provide results

checkCacheForStatementSourcesUpdateCache

public static List<StatementSource> checkCacheForStatementSourcesUpdateCache(SourceSelectionCache cache,
                                                                             List<Endpoint> endpoints,
                                                                             Resource subj,
                                                                             IRI pred,
                                                                             Value obj,
                                                                             QueryInfo queryInfo)

Checks the cache for relevant statement sources to the provided statement. If the cache has no knowledge ask the endpoint for further information.

Parameters:

cache -

endpoints -

subj -

pred -

obj -

Returns:

the list of relevant statement sources