I took at look at R2DQ github.
It uses Joseki and has a very old way to integrate with the query
engine. Both of these have gone.
At a quick glance, the Joseki stuff can be just dropped.
It will need a Fuseki adapter but they are much simpler to write
(basically, ensure D2RQ get called to initialize). Fuseki works with
regualr datasets, Josek needed an adapter layer (one of many reasons for
starting again with Fuseki).
That leaves class de.fuberlin.wiwiss.d2rq.jena.D2RQQueryHandler. If I
understand D2RQ, this is not longer needed. Jena does not use it and
D2RQ seems to integrate with a QueryEngine as well (the current way to
plug into ARQ).
I have cloned the project, hacked blindly, and made it compile.
I can't run the server tests (no MySQL DB; don't understand the
requirements for testing).
I don't understand how D2RServer is supposed to initialize inside Fuseki
(or how it initialized in Joseki). D2RQinit needs writing.
It compiles in Eclipse is all I can say about it.
https://github.com/afs/d2rq
Andy
On 05/07/13 17:47, Rob Vesse wrote:
Given how old the D2R dependencies are I suspect you would need to take
the source of D2R and upgrade it manually to the latest Jena versions.
Trying to mix and match dependencies like this (particularly across the
transition to Apache) is just going to lead to class path hell due to all
the refactoring and improvements that have happened in Jena since then.
Rob
On 7/5/13 7:19 AM, "Alex Lee" <[email protected]> wrote:
Hi,
I am trying to get a Fuseki server to interface with D2R Update as its
data
source. My initial attempts have involved including the D2R packages in
the
fuseki-server.jar and running the server with a simple D2R assembler
config
file. Through this method, I've gotten as far as getting the server to
start-up with a data source, but have been unsuccessful in getting any
queries to work. As errors have been coming up, I've simply added or
removed any classes that have been causing problems, but this has been
very
slow and brute-forced. I'm hoping there is a better solution that
preferably doesn't involve modifying source code.
The root of the issue seems to lie in the fact D2R Update uses Jena 2.6.3
and Jena ARQ 2.8.5, while the oldest version of Fuseki uses Jena 2.7.0 and
Jena ARQ 2.9.0. Based on the javadocs for each of these packages, it seems
there has been significant changes in their structures between versions,
such that D2R doesn't play nice with newer Jena/ARQ, and vice versa for
Fuseki with older Jena/ARQ.
My question is: Has anyone been able to successfully implement this setup?
Is it even possible to get this to work with just modifying various
run-time configurations, or is direct modification and re-compilation of
the code necessary?
Thanks,
--
Alex
