Hi Olivier, Thanks for the tips for using your library. It may be useful one day. Can I have a look at it? I'm wondering how the n3 graph is read (from a file?) Is it possible to manage an other data source from? like a RDF Store?
For my case, my code is inside a java servlet and I don't manage to set up the application with data from a IHM. So there is no way to use a javascript library (not yet ;-)) Thanks anyway, Brice 2013/6/5 Olivier Rossel <[email protected]> > i have a small javascript that converts a n3 graph into a javascript graph > of objects. > if your problem is related to XML stuff and such a lib could help, let me > know. > (it might be interesting to contribute it directly to exhibit, btw) > > > On Wed, Jun 5, 2013 at 6:13 PM, Brice Sommacal <[email protected] > >wrote: > > > Hello everyone, > > > > I'm facing a "java.lang.OutOfMemoryError: GC overhead limit exceeded" > error > > and I would like an advice about how I could optimize my code. > > > > The aim of this method is to run a SPARQL query, convert it on a XML > format > > and then apply a XSL stylesheet[1] to write a JSON format (readable by > > Exhibit - Scripted [2]). > > > > My piece of code was working well untill today. (I have been trying to > > query a big model and the query returns too much results). > > This makes my program break. > > > > <quote> > > Query queryToExec = QueryFactory.create(query, Syntax.syntaxARQ); > > QueryExecution qexec = QueryExecutionFactory.create(queryToExec, ontoIn); > > ResultSet result = null; > > BufferedOutputStream buf; > > try{ > > result = qexec.execSelect(); > > buf = new BufferedOutputStream(new FileOutputStream(new File(root + > > "XML/JSON_XML/"+qNameClass+".xml"))); > > //Serialization of the resultSet > > ResultSetFormatter.outputAsXML(buf, result); > > buf.close(); > > } > > catch (Exception e) { > > e.printStackTrace(); > > } > > finally{ > > qexec.close(); > > } > > </quote> > > > > I know that writing XML file use loads memory.... > > > > I was thinking of: > > - creating several XML files by tracing the ResullSetFormatter memory > > usage. (is there possible?) > > - avoiding XML intermediate format and write directly in one or several > > JSON file... > > - ... > > > > > > > Is there someone whom find a way to avoid this kind of error (without > > increasing Xms Xmx) ?? > > > > Thanks in advance, > > > > > > Brice > > > > [1] http://data-gov.tw.rpi.edu/wiki/Sparqlxml2exhibitjson.xsl > > [2] http://www.simile-widgets.org/exhibit3/ > > >
