[rules-users] setGlobal issue in StatefulSession

[Greg Barton]

Well, we can start out with the fact that this is improper java syntax:

class abstract Base () {}

The () is not in a class declaration.  Does this code compile for you? :)

--- On Mon, 5/4/09, tellkb <tellkb at gmail.com> wrote:

> From: tellkb <tellkb at gmail.com>
> Subject: [rules-users] setGlobal issue in StatefulSession
> To: rules-users at lists.jboss.org
> Date: Monday, May 4, 2009, 12:35 PM
> Hi there,
> 
> I want to set setGlobal in working memory at run time based
> on derived
> class, e.g. DerivedOne or DerivedTwo. But it throws
> following error:
> 
> 	Illegal class for global. Expected
> [org.comp.app.bean.Base], found
> [org.comp.app.bean.DerivedOne].
> 
> 
> It should automatically resolve the derived class. Please
> let me know if I'm
> doing something wrong. I'd appreciate your help.
> 
> 
> Thanks,
> -KB
> 
> Here are the classed I'm using in my test project:
> 
> 
> class abstract Base () {
> 
> 	public void init( StatefulSession workingMemory ) {
> 		this.workingMemory = workingMemory;
> 		workingMemory.setGlobal("app", this);
> 	}
> 	public void logMe() {
> 		System.out.println("From Derived BASE...");
> 	}
> }
> 
> class DerivedOne() extends Base{
> 	public void runRules( Object obj) {
> 		ObjOne obj1 = (ObjOne)obj
> 		workingMemory.insert(obj1);
> 		workingMemory.fireAllRules();   
> 		workingMemory.dispose();
> 	}
> 	public void logMe() {
> 		System.out.println("From Derived ONE...");
> 	}
> }
> 
> class DerivedTwo() extends Base{
> 	public void runRules( Object obj) {
> 		ObjTwo obj2 = (ObjTwo)obj
> 		workingMemory.insert(obj2);
> 		workingMemory.fireAllRules();   
> 		workingMemory.dispose();
> 	}
> 	public void logMe() {
> 		System.out.println("From Derived ONE...");
> 	}
> }
> 
> 
> class Caller() {
> 
> 	RuleBase ruleBase = ruleBaseFactory.open(docRules);
> 	workingMemory = ruleBase.newStatefulSession();
> 
> 	if (sub==1) {
> 		der1 = new DerivedOne();
> 		der1.init(workingMemory);
> 		der1.runRules();
> 	}
> 	else if (sub==1) {					
> 		der2 = new DerivedTwo();
> 		der2.init(workingMemory);
> 		der2.runRules();
> 	}
> }
> 
> //********DRL FILE*****
> package com.sample
>  
> import com.sample.app.RuleCaller.Message;
> 
> global com.sample.app.Base app;
> 
> rule "using a static function"
> when 
>     eval( true )
> then
>     System.out.println( "Message from Rule." );
>     app.logMe();
> end
> //********DRL FILE*****
> -- 
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> Nabble.com.
> 
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