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

[kfs2 at chryslerfinancial.com]

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 ?

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 <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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