Re: [dotNetRDF-Develop] Stardog 2.2.4 to 3.0 incompatibility

[Rob V. <rv...@do...>]

It is likely a change in the Stardog APIs from 2.x to 3.x that is causing
the issue

I personally haven't even downloaded Stardog 3.x yet so have no idea what
might be causing the issue.  One of our other developers has usually handled
updating the Stardog connectivity more recently but am not sure if he is
still actively doing this.

My guess from what you've described is that the way we determine if a graph
with that name already exists no longer returns an accurate answer for
Stardog 3.x leading to the spurious clear request.

Likely this will get fixed for the next release but we can't give you a time
frame for the fix.  Filed as CORE-443
(http://dotnetrdf.org/tracker/Issues/IssueDetail.aspx?id=443)

Rob

From:  "Nagaraju, Indresh" <Ind...@Ho...>
Reply-To:  dotNetRDF Developer Discussion and Feature Request
<dot...@li...>
Date:  Monday, 6 April 2015 07:25
To:  "dot...@li..."
<dot...@li...>
Subject:  [dotNetRDF-Develop] Stardog 2.2.4 to 3.0 incompatibility

> Hi,
>  
> We were using the below shown code to add a graph into Stardog (version
> 2.2.4). The dotNetRdf version used here is 1.0.6. This was working fine and we
> were able to add the graph.
>  
> using (StardogConnector stardogServer = new
> StardogConnector("http://localhost:5820", databaseName, username, password))
>        {
>           IGraph graph = newGraph();
>            graph.BaseUri = new Uri(graphName);
>           
>            var configuration = new
> StreamReader(@"C:\data\test.ttl").ReadToEnd();
>            graph.LoadFromString(configuration);
>  
>           // Save to Stardog
>            stardogServer.SaveGraph(graph);
>        }
>  
> Now we have upgraded Stardog to version 3.0 and tried to use the same code to
> add the graph. We are getting an error - Unable to save a Named Graph to the
> Store as this requires deleting any existing Named Graph with this name which
> failed, see inner exception for more detail.
>  
> Here are the list of things that we tried to resolve the issue:
>  
> ·        Tried with upgrading to latest dotNetRdf available (1.0.8) with no
> luck in getting this work
> 
>  
> 
> ·        Found out that for Stardog 2.2.4 a graph add request was going while
> for Stardog 3.0 a graph clear request is been sent in both the versions of
> dotNetRdf (1.0.6 and 1.0.8)
> 
>  
> Request generated for Stardog 2.2.4:
>  
> POST http://localhost:5820/testdb/82bbd2f0-5de9-492b-8615-8b5c43269618/add
> HTTP/1.1
> Accept: */*
> SD-Connection-String:
> Content-Type: application/x-trig
> Authorization: Basic YWRtaW46YWRtaW4=
> Host: localhost:5820
> Content-Length: 53102
> Expect: 100-continue
>  
> <http://www.example.com> {
> ...
> }
>  
>  
>  
> Request generated for Stardog 3.0:
>  
> POST 
> http://localhost.:5820/testdb/34204d26-9209-46f7-b2db-0f901b0fa3e6/clear/?grap
> h-uri=http%3a%2f%2fwww.example.com& HTTP/1.1
> Accept: */*
> SD-Connection-String:
> Content-Type: application/x-www-form-urlencoded
> Authorization: Basic YWRtaW46YWRtaW4=
> Host: localhost.:5820
> 
>  
> 
> ·        Made sure that there is no graph existing already in the database
> with this name.
> 
>  
> ·        Found that this error comes when graph.BaseUri is not null. We forced
> the BaseUri to be null and tried, this resulted in an add graph request, but
> received an error - HTTP/1.1 406 Not Acceptable
> 
>  
> ·        Same code works fine even now when used with 2.2.4 version of
> Stardog.
> 
>  
> 
> ·        Contacted Stardog team for help and they mentioned that the issue is
> with the client library that we are using to connect to it (i.e. dotNetRdf).
> 
>  
> 
>  
> Could you let us know what we are missing here and if this is a defect, could
> this be part of next version of dotNetRdf?
>  
> Regards,
> Indresh
> ------------------------------------------------------------------------------
> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own
> process in accordance with the BPMN 2 standard Learn Process modeling best
> practices with Bonita BPM through live exercises
> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_
> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF________
> _______________________________________ dotNetRDF-develop mailing list
> dot...@li...
> https://lists.sourceforge.net/lists/listinfo/dotnetrdf-develop