Darrin,

You have it except for 1 important line of code

        kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());

Need to add the built packages to the rule base :)

2009/4/24 Darrin Mison <dmison@redhat.com>

Hi, I'm very new to Drools and I'm trying to get code running based on the first sample code from the QuickStart chapter of the drools-doc-expert.

It compiles and runs (tried on commandline & in JBoss Dev Studio 2.0.0.GA) but does not work, ie it always says "rejected" instead of "accepted".  

I've had to fill out a bit of code to get it to compile so I may be doing something completely wrong. I've included the code (rule, model, main) below.  

Any help would be really appreciated.

Darrin

#Sample.drl

package com.company.license

rule "Is of valid age" 

when 

    $a : Applicant( age > 18);

then 

    $a.setValid( true ); 

System.out.println("true");

end

//Applicant.java

package com.company.license;

public class Applicant 

{ 

    private String name; 

    private int Age; 

    private boolean valid; 

    // getter and setter methods here 

public String getName() { return name; }

public int getAge() { return Age; }

public boolean getValid(){ return valid; }

public void setName(String s){ this.name = s; }

public void setAge(int i){ this.Age = i; }

public void setValid(boolean v){ this.valid = v; }

}

//ruletest.java

package com.company.license;

import org.drools.builder.*;

import org.drools.io.*;

import org.drools.runtime.*;

import org.drools.*;

public class ruletest

{

public ruletest(){}

public static void main(String args[])

{

ruletest rt = new ruletest();

rt.go();

}

public void go()

{

Applicant dude = new Applicant();

dude.setName("Rufus");

dude.setAge(32);

System.out.println(dude.getName());

System.out.println("test: "+dude.getValid());

KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); 

Resource ruleResource = ResourceFactory.newClassPathResource( "Sample.drl", getClass() );

kbuilder.add( ruleResource, ResourceType.DRL ); 

if ( kbuilder.hasErrors() ) 

   System.err.println( kbuilder.getErrors().toString() ); 

KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();

StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession(); 

System.out.println( dude.getValid() ); //should display false

ksession.execute( dude ); 

if (dude.getValid())

   System.out.println("Application approved"); //should display due to hardcoded as of 32

 else

   System.out.println("Application rejected");

} 

}

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