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

[Mark Proctor]

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 <mproctor at codehaus.org>*
> Sent by: rules-users-bounces at lists.jboss.org
>
> 01/23/2009 10:33 AM
> Please respond to
> Rules Users List <rules-users at lists.jboss.org>
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> 	Re: [rules-users] Drools 5 m4 in IRAD/Websphere
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> _kfs2 at chryslerfinancial.com_ <mailto: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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