Hi Claude, many thanks for the points...that was exactly what I was looking for
Many thanks again Andrea On 4 Aug 2014 18:12, "Claude Warren" <[email protected]> wrote: > Andrea, > > I am not certain that Cassandra will work for a Jena graph store because of > the requirement for the primary key column. But... > > The easiest mechanism for extension is to extend GraphBase. As the > documentation states: > > GraphBase is an implementation of Graph that provides some convenient base > functionality for Graph implementations. > > Subtypes of GraphBase must provide performAdd(Triple), > performDelete(Triple), graphBaseFind(TripleMatch,TripleAction), and > graphBaseSize(). GraphBase provides default implementations of the other > methods, including the other finds (on top of that one), a simple-minded > prepare, and contains. GraphBase also handles the event-listening and > registration interfaces. > When a GraphBase is closed, future operations on it may throw an exception. > > Once that is working you can override other methods to provide better > performance. > > Claude > > > On Fri, Aug 1, 2014 at 6:57 PM, Andrea Gazzarini <[email protected]> > wrote: > > > Hi devs, > > for a project where I'm working on, I'd need to use Jena over a nosql > > storage for storing and queryjng rdf, specifically using Cassandra. So > > after googling a bit I wasn't able to find something that fits my needs. > > > > On top of that, i'd have the following questions: > > > > - do you know if there's something ready to use? > > > > - in case the answer to the previous question is negative, I'm actively > > participating in the development of CumulusRDF [1], an RDF store that > uses > > Cassandra...but unfortunately is not using Jena :( so, here's the > > question...do you think a jena-cassandra could be a useful contribution? > I > > could reuse something did for that project (appropriately translated > into > > jena domain). In case, could you please give me some advice (e.g. > extension > > points on the jena api) to start? > > > > Best, > > Andrea > > > > [1] https://code.google.com/p/cumulusrdf > > > > > > -- > I like: Like Like - The likeliest place on the web > <http://like-like.xenei.com> > LinkedIn: http://www.linkedin.com/in/claudewarren >
