On 06/04/16 19:06, Arthur Keen wrote:
I create Fuseki 2 Datasets by passing {“dbType” : “mem”, “dbName” : “myDsName”}
in the POST request. However this sets up a dataset with default graph as an
individual graph and I would like the behavior of the default graph to be
unionDefaultGraph.
I was wondering if it is possible to pass “unionDefaultGraph” : “true” as an
additional parameter to cause the dataset’s default graph to be configured to
be the unionGraph.
I have added the parameter to my code to test, and it has no effect on the
created dataset, so either it is not allowed in the call, or I am using the
wrong key, or?
Any help would be appreciated.
-Arthur
Hi Arthur,
It's not possible at the moment.
"Provide unionDefaultGraph for all graphs"
https://issues.apache.org/jira/browse/JENA-1158
+ wiring into Fuseki.
(I hope there isn't any documentation that promises it at the moment)
For small amounts of data, using in-memory TDB + unionDefaultGraph in an
assembler will work.
Andy
protected Response createInstance(Invocation.Builder request, String
instanceName) {
//Fuseki-specific begin
List<NameValuePair> nvps = new ArrayList<>();
nvps.add(new BasicNameValuePair("dbType", "mem"));
//instance.getInstanceType()));
nvps.add(new BasicNameValuePair("dbName", "/" + instanceName));
nvps.add(new BasicNameValuePair("unionDefaultGraph", "true"));
String entity = URLEncodedUtils.format(nvps,
HTTP.DEF_CONTENT_CHARSET.name());
log.debug(entity);
return request.post(Entity.entity(entity,
MediaType.APPLICATION_FORM_URLENCODED_TYPE));
// Fuseki-specific end
}
