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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