Hmm, okay REST is one option. But I still would prefer to bind the JCR Repository in the JNDI (which is easily possible). This is an option we used already a couple of times for JackRabbit applications. By doing so, everybody in the app server can access it via JNDI, like any other datasource as well (and basically that's what a JCR Repository is).
The only dependency is to have JCR on the classpath, ok. I think for the moment I will create a Servlet which reads it from Seam and binds the Repository to JNDI. What do you think? Having a REST or Webdav API INSIDE of the Appserver to talk from Java to Java just sounds technically unnecessary complicated to me... -----Ursprüngliche Nachricht----- Von: rules-dev-boun...@lists.jboss.org [mailto:rules-dev-boun...@lists.jboss.org] Im Auftrag von Jervis Liu Gesendet: Mittwoch, 3. März 2010 08:55 An: Rules Dev List Betreff: Re: [rules-dev] Accessing JCR repository directly Bernd Rücker wrote: > > Hi Michael. > > Thanks for the quick answer! > > Our use case at the moment is, that we maintain the HEAD version of > the rules in an own table locally in the app, where we have a > specialized GUI for authoring. As soon as they get released we > leveraged the RuleTemplate to generate a DRL file, which we want to > check in Guvnor, from where the deployment snapshots are created, > versioned and so on. So we have to access Guvnor programmatically > (doesnt have to be JCR). > > A second nice use case we face is to hang in the Drools Repository > into a bigger JCR-Content-Tree (in the area of ModeShape), so there > JCR would be nice. Then we could use the JCR Explorer, written from > one of my colleagues, to have a look at the repos as well. But okay, > this is why we want to use JCR. > > But the most important issue is to access the Repository > programmatically from an EJB3. Maybe we could get around classloading > isolation and just access some static stuff for that. Or making the > ServiceImplementation really more generic usable, that would be > wonderful as well. But as it sounds it will take some time and will > not be released pretty soon? Then we have to find another way for now, > since if avoidable I dont want to patch drools. So you mean I should > use the internal Remote Interface the GWT GUI is using? Where can I > find that and how can I create a correct reference? > > Or I have to use Webdav, but this looks pretty cumberstone to use it > internally in one JBoss server instead of pure Java mechanisms? > > Thanks and cheers > > Bernd > Hi Bernd, this might be related: *http://lists.jboss.org/pipermail/rules-users/2009-December/011618.html *Basically the idea is that you expose ServiceImplementation as a remote service. As far as how the remote service is implemented, one way to go is to expose ServiceImplementation as RESTful service. Guvnor already has some Atom/Pub capabilities.It may not match your request yet, but if you have a concrete requirement on what methods in ServiceImplementation you want to expose remotely, we can look into it and get it addressed either by extending Atom/Pub capabilities that Guvnor already has (for this, take a look at http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-guvnor/sr c/main/java/org/drools/guvnor/server/files/) or by providing a truly RESTful service layer on top of Guvnor server. Cheers, Jervis > > *Von:* rules-dev-boun...@lists.jboss.org > [mailto:rules-dev-boun...@lists.jboss.org] *Im Auftrag von *Michael Neale > *Gesendet:* Montag, 1. März 2010 00:27 > *An:* Rules Dev List > *Betreff:* Re: [rules-dev] Accessing JCR repository directly > > Hi Bernd. yes you have it correctly - seam starts things up. > > IN terms of accessing JCR directly, this came up before and one idea > was to use the "remote" JCR interface - that means some refactoring I > guess. > > So the basic design is that there is a JCR server that starts up, and > the "clients" connect remotely (a client in this case is also the > Guvnor server side). > > That way you can access it from multiple places. However, it may be a > bit too low level for this - the question is what do you want to > access JCR for from your external app? > > A better approach, is to make the ServiceImplementation a true remote > interface (at the moment it is, but for GWT clients only) - so ANY > sort of client can connect and access the guvnor services, without > messing with low level data structures - I am thinking the latter is > the superior approach (and someone else was looking at it). > > Michael. > > On Sun, Feb 28, 2010 at 4:53 AM, Bernd Rücker > <bernd.ruec...@camunda.com <mailto:bernd.ruec...@camunda.com>> wrote: > > Hey guys. > > I thought I better ask that question on the dev list, correct me if > that was a bad choice ;-) > > I want to programmatically access the JCR repository from another > application (basically to author rules). I understood the > RulesRepository (which is a nice interface by the way). I tried to > understand how the JCR Session is created and can be accessed. As far > as I found it, it seems that a Seam Bean just starts everything > (RulesRepositoryManager). Now the question is: How can I access this > from another application? Because the workspace is locked, I cannot > create another Session from there. > > Wouldnt it be nice to bind the stuff in JNDI correctly or something > like that? Or if I do that, can I inject it into the Seam application? > Or maybe I can access the seam bean somehow from external? > > I think it would be the easiest and best to access the JCR repos > instead of using WebDav or whatever if I am in another EJB3 application > > Thanks a lot for any hint > > Cheers > > Bernd > > -- > > Blog: _www.bpm-guide.de <http://www.bpm-guide.de>_ > > --------------------------------------------- > > camunda services GmbH - The Business Process Company > > Zossener Straße 55-58 - 10961 Berlin > > www.camunda.com <http://www.camunda.com> - i...@camunda.com > <mailto:i...@camunda.com> > > --------------------------------------------- > > Bernd Rücker > > Geschäftsführer > > Telefon +49 30 664040 901 > > Mobil +49 171 1473461 > > bernd.ruec...@camunda.com <mailto:bernd.ruec...@camunda.com> > > --------------------------------------------- > > Amtsgericht Charlottenburg: HRB 113230 B > > Geschäftsführer: Jakob Freund, Bernd Rücker > > --------------------------------------------- > > BPMN-Buch: http://www.hanser.de/buch.asp?isbn=978-3-446-41768-7 > > EJB-3-Buch: http://www.ejbbuch.de/ > > > _______________________________________________ > rules-dev mailing list > rules-dev@lists.jboss.org <mailto:rules-dev@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/rules-dev > > > > > -- > Michael D Neale > home: www.michaelneale.net <http://www.michaelneale.net> > blog: michaelneale.blogspot.com <http://michaelneale.blogspot.com> > > ------------------------------------------------------------------------ > > _______________________________________________ > rules-dev mailing list > rules-dev@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > _______________________________________________ rules-dev mailing list rules-dev@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev _______________________________________________ rules-dev mailing list rules-dev@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev
