[rules-users] Problem with Banking Tutorial

[Mark Proctor]

There are a lot of fixes in the 5.x master. Anyone verified their bugs against this? I suspect this is fixed in that.


Mark
On 18 Apr 2013, at 16:21, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:

> Ah, my memory :-)
> 
> http://lists.jboss.org/pipermail/rules-dev/2013-January/004338.html
> 
> Mark has promised a fix for 3 months ago, but of course 5.5.0 remains broken.
> 
> -W
> 
> On 18/04/2013, Stefan Schuster <stefan.m.schuster at gmail.com> wrote:
>> Hi, thank you for your response.
>> I'm using the latest stable release of Drools 5.5.0 final.
>> Eclipse is Juno Service Release 2.
>> 
>> Can you confirm, that the order 1,2,3 is the expected result?
>> 
>> If this is a known bug, is there some kind of jira or bugzilla numer
>> assigned to it?
>> 
>> 
>> 
>> 2013/4/18 Wolfgang Laun <wolfgang.laun at gmail.com>
>> 
>>> IIRC, this was a bug one or two minor versions ago. What version are you
>>> using?
>>> -W
>>> 
>>> On 18/04/2013, Stefan Schuster <stefan.m.schuster at gmail.com> wrote:
>>>> For the sake of  completeness, here is also the RuleRunner class used
>>>> in
>>>> this example:
>>>> 
>>>> package org.drools.tutorials.banking;
>>>> 
>>>> import java.util.Collection;
>>>> 
>>>> import org.drools.KnowledgeBase;
>>>> import org.drools.KnowledgeBaseFactory;
>>>> import org.drools.builder.KnowledgeBuilder;
>>>> import org.drools.builder.KnowledgeBuilderFactory;
>>>> import org.drools.builder.ResourceType;
>>>> import org.drools.definition.KnowledgePackage;
>>>> import org.drools.io.ResourceFactory;
>>>> import org.drools.runtime.StatefulKnowledgeSession;
>>>> 
>>>> public class RuleRunner {
>>>> 
>>>>    public RuleRunner() {
>>>>    }
>>>> 
>>>>    public void runRules(String[] rules,
>>>>                         Object[] facts) {
>>>> 
>>>>        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
>>>>        KnowledgeBuilder kbuilder =
>>>> KnowledgeBuilderFactory.newKnowledgeBuilder();
>>>> 
>>>>        for ( int i = 0; i < rules.length; i++ ) {
>>>>            String ruleFile = rules[i];
>>>>            System.out.println( "Loading file: " + ruleFile );
>>>>            kbuilder.add( ResourceFactory.newClassPathResource(
>>>> ruleFile,
>>>> 
>>>> RuleRunner.class ),
>>>>                                  ResourceType.DRL );
>>>>        }
>>>> 
>>>>        Collection<KnowledgePackage> pkgs =
>>>> kbuilder.getKnowledgePackages();
>>>>        kbase.addKnowledgePackages( pkgs );
>>>>        StatefulKnowledgeSession ksession =
>>>> kbase.newStatefulKnowledgeSession();
>>>> 
>>>>        for ( int i = 0; i < facts.length; i++ ) {
>>>>            Object fact = facts[i];
>>>>            System.out.println( "Inserting fact: " + fact );
>>>>            ksession.insert( fact );
>>>>        }
>>>> 
>>>>        ksession.fireAllRules();
>>>>    }
>>>> }
>>>> 
>>>> 
>>>> 2013/4/18 Stefan Schuster <stefan.m.schuster at gmail.com>
>>>> 
>>>>> Hello,
>>>>> 
>>>>> I have a problem with the banking tutorial number 3, which is part of
>>> the
>>>>> examples of drools expert.
>>>>> It simply adds some Numbers as facts, and retracts them in an
>>>>> increasing
>>>>> order.
>>>>> 
>>>>> It is very short, therefore I post the whole Code:
>>>>> 
>>>>> 
>>>>> BankingExample3.java
>>>>> _________________________________________________
>>>>> package org.drools.tutorials.banking;
>>>>> 
>>>>> public class BankingExample3 {
>>>>>    public static void main(String[] args) {
>>>>>        Number[] numbers = new Number[] {wrap(3), wrap(1), wrap(4),
>>>>> wrap(1), wrap(5)};
>>>>>        new RuleRunner().runRules( new String[] { "Example3.drl" },
>>>>>                                   numbers );
>>>>>    }
>>>>> 
>>>>>    private static Integer wrap(int i) {
>>>>>        return new Integer(i);
>>>>>    }
>>>>> }
>>>>> _________________________________________________
>>>>> 
>>>>> 
>>>>> 
>>>>> Example3.drl:
>>>>> _________________________________________________
>>>>> package org.drools.tutorials.banking
>>>>> 
>>>>> rule "Rule 01"
>>>>>    when
>>>>>        $number : Number()
>>>>>        not Number( intValue < $number.intValue )
>>>>>    then
>>>>>        System.out.println("Number found with value: " +
>>>>> $number.intValue() );
>>>>>        retract( $number );
>>>>> end
>>>>> _________________________________________________
>>>>> 
>>>>> 
>>>>> Output:
>>>>> _________________________________________________
>>>>> Loading file: Example3.drl
>>>>> Inserting fact: 3
>>>>> Inserting fact: 1
>>>>> Inserting fact: 4
>>>>> Inserting fact: 1
>>>>> Inserting fact: 5
>>>>> Number found with value: 1
>>>>> Number found with value: 1
>>>>> Number found with value: 3
>>>>> Number found with value: 4
>>>>> Number found with value: 5
>>>>> _________________________________________________
>>>>> 
>>>>> 
>>>>> that seams absolute logically to me.
>>>>> But now I alter the Numbers in the Java-Part:
>>>>> Number[] numbers = new Number[] {wrap(3), wrap(1), wrap(2)};
>>>>> 
>>>>> and the output destroys everything I thought I understood:
>>>>> Loading file: Example3.drl
>>>>> Inserting fact: 3
>>>>> Inserting fact: 1
>>>>> Inserting fact: 2
>>>>> Number found with value: 1
>>>>> Number found with value: 3
>>>>> Number found with value: 2
>>>>> 
>>>>> 
>>>>> Can someone  reproduce this behavior?? It seams absolutely strange to
>>> me.
>>>>> I would have expected the order 1,2,3. Any explanations?
>>>>> 
>>>>> Thanks in advance for helping me!
>>>>> 
>>>>> 
>>>>> 
>>>> 
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>> 
>> 
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