On 22/01/12 15:36, John Fereira wrote:
Greetings,
I just joined the list but have been working with jena and other
semantic web tools and apps for awhile. I've been trying to get fuseki
running and think I'm really close to what I want to do with it, but not
quite here.
I'm working with a semantic web application called Vivo
(vivoweb.org)
which uses a SDB backed with MySQL. I've written a java web app which
manages sparql queries, issues them against a joseki SPARQL endpoint and
returns the results in multiple formats (basically similar to what elda
is doing.) That's been running in production for over a year but because
we've run into issues with joseki hanging up (we've got a restart script
the runs periodically to restart the service) and elda is quite a bit
more robust then the webapp I wrote I'm looking at a elda/fuseki/vivo
configuration that will be used for a project that I am working on for a
well known UN organization.
I've got an elda/joseki/vivo implementation working and it serves up
LOD datasets fine so far but I'm running into issues replacing joseki
with fuseki. I built a fuseki instance from the 0.2.1-SNAPSHOT
You can get development builds from
https://repository.apache.org/content/repositories/snapshots/org/apache/jena/jena-fuseki/
It's rebuild nightly if anything changed.
and added
SDB support and MySQL libraries. It starts up without any errors, but
when I access it from elda (or the s-query tool in the fuseki dist),
fuseki is handling the query but returning no results. My test, using
s-tools, looks like this:
./s-query --service http://localhost:3030/ds/sparql 'SELECT * {?s ?p ?o}'
Which returns:
{
"head": {
"vars": [ "s" , "p" , "o" ]
} ,
"results": {
"bindings": [
]
}
}
I can provide a copy of my fuseki "desc" file if necessary but thought I just
check first to see if anyone has any ideas.
Yes please.
And are you absolutely sure there is data in the default graph? It's
rather easy to not have data and only find out later.
Andy
