[rules-users] Drools 5 m4 in IRAD/Websphere

[Faron Dutton]

Take a look at Retroweaver (http://retroweaver.sourceforge.net/). It
compiles Java 5 source to JRE 1.4 classes. I remember there being several
open-source tools like this but I could not find them with a quick search.

 

I have not used this myself but have plans to integrate it into my build
scripts.

--Faron.

 

From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Mark Proctor
Sent: Monday, February 02, 2009 12:23 PM
To: Rules Users List
Subject: Re: [rules-users] Drools 5 m4 in IRAD/Websphere

 

kfs2 at chryslerfinancial.com wrote: 


Our application is stuck with Websphere 6/jdk 1.4.  I want to use Guvnor for
our rule management as we have business users editing rules.  Would it be
possible to use drools 4.0.7 compiler in the application which would read
the rules from guvnor as source instead of compiled ?  I realize that we
would have to avoid rule semantics that are new in drools 5.  Could that
work or are we asking for trouble ? 

It won't work out of the box. Given enough time and resources you could
probably make it work.




My fallback option is to stand up a jboss server as a rules server and make
requests to it via webservice calls.  But I was hoping to have tighter
integration between our application and the rules engine. 

Thanks for any input.   

FYI: we trying to migrate away from our Pega rules engine to drools and I
have found drools to be very refreshing in a number of ways.  Thanks for
your excellent work. 






Mark Proctor  <mailto:mproctor at codehaus.org> <mproctor at codehaus.org> 
Sent by: rules-users-bounces at lists.jboss.org 

01/23/2009 10:33 AM 


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Re: [rules-users] Drools 5 m4 in IRAD/Websphere

 

		




kfs2 at chryslerfinancial.com wrote: 

I've read that Drools is compatible with jdk 1.4 but I get the error below
in IRAD 6 which is jdk version: 
java version "1.4.2" 
Drools 4 is JDK1.4 compatible, Drools 5.0 is JDK1.5+ we do not have plans to
backport. 
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2) 
Classic VM (build 1.4.2, J2RE 1.4.2 IBM Windows 32 build cn142ifx-20060307
(142S 
R4-1 + 98226) (JIT enabled: jitc)) 

I searched the archives but could not find anything about this.  Any
suggestions would be appreciated. 

The java class could not be loaded. java.lang.UnsupportedClassVersionError:
org/drools/event/KnowledgeRuntimeEventManager (Unsupported major.minor
version 49.0) 

Thanks 

Kent 

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