[rules-users] Problem with Banking Tutorial
Davide Sottara
dsotty at gmail.com
Tue Apr 23 17:37:58 EDT 2013
It is still realistic.. the team is preparing a beta release of 6.x.
When that is done, I hope they will focus on finalizing 5.x..
I am waiting for 5.6.Final myself :)
You may have answered this question before.. could you give a try at
5.5.1-SNAPSHOT?
Thanks for your patience
Davide
On 04/23/2013 01:50 AM, Stefan Schuster wrote:
> Hi all,
>
> thanks a lot for your helpful answers.
>
> I'm looking forward to the update to 5.6.0. Is the mentioned time
> horizon ("a few days") still realistic? I.e. could you recommend me to
> pause the evaluation of drools, instead of downgrading to 5.4.0?
>
> We consider to use drools in a larger project, and I have to
> decide whether I recommend drools, or prefer a simpler design
> developed from scratch. As far it's an fact that I cannot recommend
> drools 5.5.0.
>
> What version is reasonable to use for further evaluation?
>
> Stefan
>
>
>
>
>
> 2013/4/19 Wolfgang Laun <wolfgang.laun at gmail.com
> <mailto:wolfgang.laun at gmail.com>>
>
> On 18/04/2013, Stefan Schuster <stefan.m.schuster at gmail.com
> <mailto:stefan.m.schuster at gmail.com>> wrote:
> >
> > Please don't misunderstand me, I have a deep respect for the
> developer of
> > such complex systems like DROOLS, and I know from my own code
> that bugs
> > simply happen. But I wonder why there is still this version
> without any
> > warning the official release?
> >
>
> Not putting out warnings when some release is known to be broken is a
> rather dark spot on the gloss of Drools. I have urged this before,
> mainly because
> not warning users is a primary cause for them wasting time and effort.
>
> Keep carping...
> Wolfgang
>
>
>
>
> > Is it better to use an older version?
> >
> > best regards
> >
> > Stefan
> >
> >
> >
> >
> > 2013/4/18 Mark Proctor <mproctor at codehaus.org
> <mailto:mproctor at codehaus.org>>
> >
> >> 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 <mailto: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
> <mailto: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
> <mailto: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
> <mailto: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
> <mailto: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
> <mailto:rules-users at lists.jboss.org>
> >> >>> https://lists.jboss.org/mailman/listinfo/rules-users
> >> >>>
> >> >>
> >> > _______________________________________________
> >> > rules-users mailing list
> >> > rules-users at lists.jboss.org <mailto:rules-users at lists.jboss.org>
> >> > https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >>
> >> _______________________________________________
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> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
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