Hi Gofran,

The trace results are written to the "virtuoso.log" in the database directory 
on the server ... remember to run "trace_off()" to turn it off when done 
otherwise the log can grow quite quickly especially if all tracing is on ...

Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc.      //              http://www.openlinksw.com/
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Universal Data Access, Integration, and Management Technology Providers

On 23 May 2014, at 12:05, Gofran Shukair <gofranshuk...@gmail.com> wrote:

> Hello Hugh,
> I was check the trace_on function, and it seems it does not return values.
> Here is how I am running it:
> 1- I log in to ISQL with DBA.
> 2- I run the command   trace_on ('user_log', 'failed_log');
> but still no results
> 
> 
> 
> 
> 
> 
> On Fri, May 23, 2014 at 11:46 AM, Hugh Williams <hwilli...@openlinksw.com> 
> wrote:
> Hi Gofran,
> 
> If you turn server side tracing on in Virtuoso using the "trace_on()" [1] 
> command is the request actually reaching the server ?
> 
> Best Regards
> Hugh Williams
> Professional Services
> OpenLink Software, Inc.      //              http://www.openlinksw.com/
> Weblog   -- http://www.openlinksw.com/blogs/
> LinkedIn -- http://www.linkedin.com/company/openlink-software/
> Twitter  -- http://twitter.com/OpenLink
> Google+  -- http://plus.google.com/100570109519069333827/
> Facebook -- http://www.facebook.com/OpenLinkSoftware
> Universal Data Access, Integration, and Management Technology Providers
> 
> [1] http://docs.openlinksw.com/virtuoso/fn_trace_on.html
> 
> On 23 May 2014, at 11:11, Gofran Shukair <gofranshuk...@gmail.com> wrote:
> 
>> 
>> Hello all,
>> 
>> I was hoping that you could help me with this issue related to Virtuoso. I 
>> have problem with the update query using HTTP call from Jena. 
>> 
>> Running the same query from the SPARQL interface in the conductor –logged in 
>> as DBA- works fine, but calling the SPARQL endpoint from Java program with 
>> the same credentials does not work. I know that SPARQL conductor runs using 
>> the “SPARQL” user, So I tried both “SPARQL” and “DBA” but still not working. 
>> 
>> There is no error or exception, but the update is not occurring. 
>> 
>> Do you have any idea about what is the right way to run an update query from 
>> Jena against a Virtuoso endpoint?
>> 
>> Here is how I call the endpoint from Java using Jena:
>> 
>> 
>> Context ctx = ARQ.getContext();
>> Map<String, Context> serviceContext = new HashMap<String, Context>();
>> Context authContext = new Context();
>> authContext.put(Service.queryAuthUser, "dba");
>> authContext.put(Service.queryAuthPwd, "pass");
>> serviceContext.put(this.dataSetUpdateURL, authContext);
>> ctx.put(Service.serviceContext, serviceContext);
>> 
>> UpdateRequest update = new UpdateRequest();
>> update.add(queryString);
>> 
>> UpdateProcessRemoteBase ue = (UpdateProcessRemoteBase) 
>> UpdateExecutionFactory.createRemote(update, this.dataSetUpdateURL,ctx);
>> ue.execute();
>> The query is something like:
>> 
>> 
>> With <http:/graph>
>> Delete {
>> ?s ?p ?o.
>> }
>> Insert {
>> ?s ?p ?o2.
>> }
>> Where {
>> ?s ?p ?o.
>> }
>> I tried both http://<ip>:<port>/sparql and http://<ip>:<port>/sparql-auth 
>> for the dataSetUpdateURL and changed the user to have the right group 
>> "SPARQL_UPDATE"
>> 
>> Here are the logs
>> 
>> 2014-05-22 17:19:52,724 DEBUG 
>> [com.hp.hpl.jena.sparql.modify.UpdateProcessRemoteBase]: Endpoint 
>> URIhttp://localhost/sparql-auth has SERVICE Context: 
>> symbol:http://jena.hpl.hp.com/Service#queryAuthPwd = pass_dba 
>> symbol:http://jena.hpl.hp.com/Service#queryAuthUser = dba
>> 
>> 2014-05-22 17:19:52,724 DEBUG 
>> [com.hp.hpl.jena.sparql.modify.UpdateProcessRemoteBase]: Setting basic HTTP 
>> authentication for endpoint URI http://localhost/sparql-auth with username: 
>> dba
>> 
>> Thanks,
>> Gofran
>> 
>> ------------------------------------------------------------------------------
>> "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE
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>> available
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>> http://p.sf.net/sfu/SauceLabs_______________________________________________
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>> Virtuoso-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
> 
> 
> 
> 
> -- 
> Peace,
> Gofran Shukair

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