[rules-users] Problem Setting globals in drools session

[Greg Barton]

Does your application use multiple classloaders? It's possible for two instances with the same class definition to not have "equal" classes if the class is loaded twice from different classloaders.

--- On Mon, 7/5/10, djerir smail <1983djerir at gmail.com> wrote:

> From: djerir smail <1983djerir at gmail.com>
> Subject: [rules-users] Problem Setting globals in drools session
> To: "Rules Users List" <rules-users at lists.jboss.org>
> Date: Monday, July 5, 2010, 2:38 PM
> Hello everybody,
> 
> When I try to sett my globals  I get this error
> 
> 2010-07-05 21:26:04,531 ERROR [STDERR]
> java.lang.RuntimeException: 
> Illegal class for global. Expected
> [ulb.mfe.srabre.ra.BREINTERFACE], 
> found [ulb.mfe.srabre.ra.BREINTERFACE].
> 
> Can anyone explain to me what does this error mean please
> .
> 
> MY DRL FILE
> 
> package ulb.mfe.srabre.rule
> 
> import ulb.mfe.srabre.ra.BREINTERFACE;
> import ulb.mfe.srabre.ra.DROOLSSLEEAgent;
> 
> global ulb.mfe.srabre.ra.BREINTERFACE BRERAInterface;
> global ulb.mfe.srabre.ra.DROOLSSLEEAgent DROOLSSLEEAgent;
> 
> rule "MaxBtsAlarmrule"
> dialect "mvel"
> 
> when
> 
>  $B : BREINTERFACE()
> then
>     System.out.println(" HELLO ");
> end
> 
> 
> 
> 
> my code
> 
> 
> public void Insert(Object fact) {
>     try{   
>         KnowledgeSessionConfiguration
> sessConfig = 
> KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
>        
> sessConfig.setOption(ClockTypeOption.get("pseudo"));
>         StatefulKnowledgeSession
> session = 
> knowledgeBase.newStatefulKnowledgeSession();
>        
> session.setGlobal("BRERAInterface", this.breinter);
>        
> session.setGlobal("DROOLSSLEEAgent", this.droolssleeAgent);
>         session.insert(this.breinter);
>         System.out.println("Fact is now
> inserted");
>         session.fireAllRules();
>     } catch (Throwable t) {
>         logger.info("sml couldn't set
> up a session");
>         t.printStackTrace();
>     }
>     }
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