Thanks Mike for your comments. I did look at JBoss Rails and it was very interesting.

Out here, we have a core Ruby application that cannot be ported (easily enough) to JRuby. We are planning to introduce a rule engine into the mix.
The idea possibly is to inject the ruby object from the master application via a queue (Stomp?). Another JRuby app (which encapsulates Drools), would pick up the ruby object, use the Spring scaffolding as discussed in this thread to present to the rule engine as a java object.
At the end of rule invocation, the JRuby app would post the object back to the queue to return to the master application.

We could possibly use JBoss Rails for the JRuby app that we would have to build.

Regards,
Prem


2009/3/20 Anstis, Michael (M.) <manstis1@ford.com>
I read that JBoss AS supports JRuby classes running in the JVM...
 
http://oddthesis.org/posts/2009-03-jboss-rails-1-0-0-beta4-in-time-for-the-weekend
 
Whilst I haven't used it nor read about it in detail perhaps this is something that might be of interest.
 
With kind regards,
 
Mike

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli
Sent: 19 March 2009 16:06
To: Rules Users List
Subject: Re: [rules-users] Inserting a JRuby object via Spring JRubyScriptFactory in Drools


   Drools always looks for getters/setters, never for the actual internal attribute.

   As long as you have an instance of a given interface and your rules are written against the interface you should be fine in Drools 5.

   Drools 4 used shadow facts, so, there would be more considerations to make on drools 4.

   []s
   Edson

2009/3/19 Premkumar Stephen <prem18@gmail.com>
Hello Folks,

I have been looking at options of using ruby objects as fact objects in Drool's working memory.

One obvious way is using services.

Another path that I have been researching about is to use Spring as outlined here http://www.jroller.com/habuma/entry/spring_meet_ruby 

Now, in this example, if the Lime ruby object were like a POJO, (contains fields), will I be able to insert this object into the workingMemory?  My Lime interface would have getters and setters. Will the engine look for the fields themselves in an object or can it work with just getters and setters ( as would be declared in the Lime.java interface and defined in the Lime.rb ruby class? 

Are there any drawbacks in doing it this way?

Any comments/pointers will be appreciated.

Thanks!!

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 Edson Tirelli
 JBoss Drools Core Development
 JBoss, a division of Red Hat @ www.jboss.com

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