On 16/01/12 19:43, Luigi Selmi wrote:
Hi,
I would like to access a default graph from a java application
that is stored in a dataset inside Jena TDB from a remote machine and
then use the model in the application. It seems that the only way is to
use Joseki or Fuseki and make a SPARQL query using the
QueryExecutionFactory class
QueryExecution qexec = QueryExecutionFactory.sparqlService(service, query);
but how can I get the model of the default graph from qexec ?
Btw with arq2.8.8 the query seems to be sent malformed to Fuseki. My app sends
"SELECT * WHERE { ?s ?p ?o }"
and Fuseki gets
INFO
[qtp14696971-15] (SPARQL_ServletBase.java:117) - [1] GET
http://localhost:3030/datadir?query=SELECT++*%0AWHERE%0A++%7B+%3Fs+%3Fp+%3Fo+%7D%0A
INFO [qtp14696971-15] (SPARQL_ServletBase.java:154) - [1] 400 Neither
?default and ?graph in request
Thanks
Luigi
Luigi,
Just to check my understanding - you want to read the whole of the
default graph out of a remote dataset in Fuseki.
The "SPARQL 1.1 Graph Store Protocol" is you're friend here.
Just do.
String str = "http://localhost:3030/datadir/data?default"; ;
Model m = FileManager.get().loadModel(str) ;
Note the /datadir/data -- ../data is the service for the graph store
protocol.
> INFO
> [qtp14696971-15] (SPARQL_ServletBase.java:117) - [1] GET
>
http://localhost:3030/datadir?query=SELECT++*%0AWHERE%0A++%7B+%3Fs+%3Fp+%3Fo+%7D%0A
> INFO [qtp14696971-15] (SPARQL_ServletBase.java:154) - [1] 400
Neither ?default and ?graph in request
http://localhost:3030/datadir isn't the SPARQL endpoint.
Each dataset has a number of services : usually called
http://localhost:3030/datadir/sparql SPARQL Query
http://localhost:3030/datadir/data graph store protocol
http://localhost:3030/datadir/update SPARQL Update
but config.ttl can change those.
So you want
http://localhost:3030/datadir/sparql?query=....
Andy
