org.trellisldp.triplestore

Class TriplestoreResourceService

java.lang.Object

org.trellisldp.triplestore.TriplestoreResourceService

All Implemented Interfaces:

ResourceService, RetrievalService<Resource>

@ApplicationScoped
public class TriplestoreResourceService
extends Object
implements ResourceService

A triplestore-based implementation of the Trellis ResourceService API.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONFIG_TRIPLESTORE_LDP_TYPE The configuration key used to set whether the LDP type should be included in the body of the RDF.
static String	CONFIG_TRIPLESTORE_RDF_LOCATION The configuration key used to set where the RDF is stored.

Constructor Summary

Constructors

Constructor and Description
TriplestoreResourceService() Create a triplestore-backed resource service.
TriplestoreResourceService(RDFConnection rdfConnection) Create a triplestore-backed resource service.
TriplestoreResourceService(RDFConnection rdfConnection, IdentifierService identifierService) Create a triplestore-backed resource service.

Method Summary

Modifier and Type	Method and Description
CompletionStage<Void>	add(IRI id, Dataset dataset)
static RDFConnection	buildRDFConnection(String location) Build an RDF connection from a location value.
CompletionStage<Void>	create(Metadata metadata, Dataset dataset) Create a resource in the server.
CompletionStage<Void>	delete(Metadata metadata) Delete a resource from the server.
String	generateIdentifier() An identifier generator.
CompletionStage<Resource>	get(IRI identifier) Get a resource by the given identifier.
void	initialize() This code is equivalent to the SPARQL queries below.
CompletionStage<Void>	replace(Metadata metadata, Dataset dataset) Replace a resource in the server.
Set<IRI>	supportedInteractionModels() Return a collection of interaction models supported by this Resource Service.
CompletionStage<Void>	touch(IRI identifier) Update the modification date of the provided resource.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.trellisldp.api.ResourceService

skolemize, toExternal, toInternal, unskolemize

Field Detail

CONFIG_TRIPLESTORE_RDF_LOCATION

public static final String CONFIG_TRIPLESTORE_RDF_LOCATION

The configuration key used to set where the RDF is stored.

See Also:

Constant Field Values

CONFIG_TRIPLESTORE_LDP_TYPE

public static final String CONFIG_TRIPLESTORE_LDP_TYPE

The configuration key used to set whether the LDP type should be included in the body of the RDF.

See Also:

Constant Field Values

Constructor Detail

TriplestoreResourceService

public TriplestoreResourceService()

Create a triplestore-backed resource service.

TriplestoreResourceService

public TriplestoreResourceService(RDFConnection rdfConnection)

Create a triplestore-backed resource service.

Parameters:

rdfConnection - the connection to an RDF datastore

TriplestoreResourceService

@Inject
public TriplestoreResourceService(RDFConnection rdfConnection,
                                          IdentifierService identifierService)

Create a triplestore-backed resource service.

Parameters:

rdfConnection - the connection to an RDF datastore

identifierService - an ID supplier service

Method Detail

delete

public CompletionStage<Void> delete(Metadata metadata)

Description copied from interface: ResourceService

Delete a resource from the server.

Specified by:

delete in interface ResourceService

Parameters:

metadata - metadata for the resource

Returns:

a new completion stage that, when the stage completes normally, indicates that the resource was successfully deleted from the corresponding persistence layer. In the case of an unsuccessful delete operation, the CompletionStage will complete exceptionally and can be handled with CompletionStage.handle(java.util.function.BiFunction<? super T, java.lang.Throwable, ? extends U>), CompletionStage.exceptionally(java.util.function.Function<java.lang.Throwable, ? extends T>) or similar methods.

create

public CompletionStage<Void> create(Metadata metadata,
                                    Dataset dataset)

Description copied from interface: ResourceService

Create a resource in the server.

Specified by:

create in interface ResourceService

Parameters:

metadata - metadata for the new resource

dataset - the dataset to be persisted

Returns:

a new completion stage that, when the stage completes normally, indicates that the supplied data were successfully created in the corresponding persistence layer. In the case of an unsuccessful write operation, the CompletionStage will complete exceptionally and can be handled with CompletionStage.handle(java.util.function.BiFunction<? super T, java.lang.Throwable, ? extends U>), CompletionStage.exceptionally(java.util.function.Function<java.lang.Throwable, ? extends T>) or similar methods.

replace

public CompletionStage<Void> replace(Metadata metadata,
                                     Dataset dataset)

Description copied from interface: ResourceService

Replace a resource in the server.

Specified by:

replace in interface ResourceService

Parameters:

metadata - metadata for the resource

dataset - the dataset to be persisted

Returns:

a new completion stage that, when the stage completes normally, indicates that the supplied data were successfully stored in the corresponding persistence layer. In the case of an unsuccessful write operation, the CompletionStage will complete exceptionally and can be handled with CompletionStage.handle(java.util.function.BiFunction<? super T, java.lang.Throwable, ? extends U>), CompletionStage.exceptionally(java.util.function.Function<java.lang.Throwable, ? extends T>) or similar methods.

initialize

@PostConstruct
public void initialize()

This code is equivalent to the SPARQL queries below.

 SELECT ?object WHERE {
   GRAPH trellis:PreferServerManaged { IDENTIFIER rdf:type ?object }
 }
 

 INSERT DATA {
   GRAPH trellis:PreferServerManaged {
     IDENTIFIER rdf:type ldp:Container ;
                dc:modified "NOW"^^xsd:dateTime }
   GRAPH IDENTIFIER?ext=audit {
     IDENTIFIER prov:wasGeneratedBy [
       rdf:type prov:Activity , as:Create ;
       prov:wasAssociatedWith trellis:AdministorAgent ;
       prov:atTime "TIME"^^xsd:dateTime ] }
   GRAPH IDENTIFIER?ext=acl {
     IDENTIFIER acl:mode acl.Read , acl:Write , acl:Control ;
       acl:agentClass foaf:Agent ;
       acl:accessTo IDENTIFIER }
 }

 

get

public CompletionStage<Resource> get(IRI identifier)

Description copied from interface: RetrievalService

Get a resource by the given identifier.

Specified by:

get in interface RetrievalService<Resource>

Parameters:

identifier - the resource identifier

Returns:

the resource

generateIdentifier

public String generateIdentifier()

Description copied from interface: ResourceService

An identifier generator.

Specified by:

generateIdentifier in interface ResourceService

Returns:

a new identifier

add

public CompletionStage<Void> add(IRI id,
                                 Dataset dataset)

Specified by:

add in interface ResourceService

Parameters:

id - the identifier under which to persist a dataset

dataset - a dataset to persist

Returns:

a new completion stage that, when the stage completes normally, indicates that the supplied data were successfully stored in the corresponding persistence layer. In the case of an unsuccessful write operation, the CompletionStage will complete exceptionally and can be handled with CompletionStage.handle(java.util.function.BiFunction<? super T, java.lang.Throwable, ? extends U>), CompletionStage.exceptionally(java.util.function.Function<java.lang.Throwable, ? extends T>) or similar methods.

touch

public CompletionStage<Void> touch(IRI identifier)

Description copied from interface: ResourceService

Update the modification date of the provided resource.

Specified by:

touch in interface ResourceService

Parameters:

identifier - the identifier of the resource

Returns:

a new completion stage that, when the stage completes normally, indicates that the identified resource has been updated with a new modification date.

supportedInteractionModels

public Set<IRI> supportedInteractionModels()

Description copied from interface: ResourceService

Return a collection of interaction models supported by this Resource Service.

Specified by:

supportedInteractionModels in interface ResourceService

Returns:

a set of supported interaction models

buildRDFConnection

public static RDFConnection buildRDFConnection(String location)

Build an RDF connection from a location value.

Parameters:

location - the location of the RDF

Returns:

a connection to the RDF store

Implementation Note:

A null value will create an in-memory RDF store, a file path will create a TDB2 RDF store, and a URL will use a remote triplestore.