Class
TsparqlEndpoint
Description [src]
abstract class Tsparql.Endpoint : GObject.Object
{
/* No available fields */
}TrackerEndpoint is a helper object to make RDF triple stores represented
by a TrackerSparqlConnection publicly available to other processes/hosts.
This is a base abstract object, see TrackerEndpointDBus to make
RDF triple stores available to other processes in the same machine, and
TrackerEndpointHttp to make it available to other hosts in the network.
When the RDF triple store represented by a TrackerSparqlConnection
is made public this way, other peers may connect to the database using
tracker_sparql_connection_bus_new() or tracker_sparql_connection_remote_new()
to access this endpoint exclusively, or they may use the SERVICE <uri> { ... } SPARQL
syntax from their own TrackerSparqlConnections to expand their data set.
By default, and as long as the underlying TrackerSparqlConnection
allows SPARQL updates and RDF graph changes, endpoints will allow updates
and modifications to happen through them. Use tracker_endpoint_set_readonly()
to change this behavior.
By default, endpoints allow access to every RDF graph in the triple store
and further external SPARQL endpoints to the queries performed on it. Use
tracker_endpoint_set_allowed_graphs() and
tracker_endpoint_set_allowed_services() to change this behavior. Users do
not typically need to do this for D-Bus endpoints, as these do already have a layer
of protection with the Tracker portal. This is the mechanism used by the portal
itself. This access control API may not interoperate with other SPARQL endpoint
implementations than Tracker.
Instance methods
tracker_endpoint_get_allowed_graphs
Returns the list of RDF graphs that the endpoint allows access for.
since: 3.7
tracker_endpoint_get_allowed_services
Returns the list of external SPARQL endpoints that are allowed to be accessed through this endpoint.
since: 3.7
tracker_endpoint_get_readonly
Returns whether the endpoint is readonly, thus SPARQL update queries are disallowed.
since: 3.7
tracker_endpoint_get_sparql_connection
Returns the TrackerSparqlConnection that this endpoint proxies
to a wider audience.
tracker_endpoint_set_allowed_graphs
Sets the list of RDF graphs that this endpoint will allow access
for. Any explicit (e.g. GRAPH keyword) or implicit (e.g. through the
default anonymous graph) access to RDF graphs unespecified in this
list in SPARQL queries will be seen as if those graphs did not exist, or
(equivalently) had an empty set. Changes to these graphs through SPARQL
updates will also be disallowed.
since: 3.7
tracker_endpoint_set_allowed_services
Sets the list of external SPARQL endpoints that this endpoint
will allow access for. Access through the SERVICE SPARQL syntax
will fail for services not specified in this list.
since: 3.7
tracker_endpoint_set_readonly
Sets whether the endpoint will be readonly. Readonly endpoints
will not allow SPARQL update queries. The underlying
TrackerSparqlConnection may be readonly of its own, this
method does not change its behavior in any way.
since: 3.7
Properties
Tsparql.Endpoint:allowed-graphs
RDF graphs that are allowed to be accessed through queries to this endpoint. See tracker_endpoint_set_allowed_graphs().
since: 3.7
Tsparql.Endpoint:allowed-services
External SPARQL endpoints that are allowed to be accessed through queries to this endpint. See tracker_endpoint_set_allowed_services().
since: 3.7
Tsparql.Endpoint:readonly
Whether the endpoint allows SPARQL updates or not. See tracker_endpoint_set_readonly().
since: 3.7
Signals
Signals inherited from GObject (1)
GObject::notify
The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.