[rules-users] Entry-Points can cause NullPointerExceptionand/or no rule firing

Fri May 14 10:51:44 EDT 2010

Hi Greg!

Thanks for your quick answer.

I’m having some trouble with absence of events in Drools (I’ve send some emails on the mailing list regarding that) and I personally think it’s some kind of bug (mine or, probably, drools).

So, I’m looking for some help. Instead of explaining all over again, I just point the issue out.

Sorry about this mess, too much time around this problem J

Thanks, once again!

Vítor Mendonça Moreira
Analista / Programador
Direcção de Investigação e Desenvolvimento

Rua Dr. Francisco Sá Carneiro, nº. 4 r/c esq.
2500 - 206 - Caldas da Rainha
Tel: (+351) 262 832 196
Fax: (+351) 262 186 455
Web: www.makewise.pt <http://www.makewise.pt> 
Uma empresa: Grupo Sousa Pedro <http://www.sousapedro.com>  

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Greg Barton
Sent: sexta-feira, 14 de Maio de 2010 15:31
To: Rules Users List
Subject: Re: [rules-users] Entry-Points can cause NullPointerExceptionand/or no rule firing

JIRA issues are for reporting bugs in drools.  Is there a bug you're reporting or do you want help with this particular problem?

--- On Fri, 5/14/10, Makewise - Vitor Rui Mendonça <Vitor.Mendonca at brisa.pt> wrote:

From: Makewise - Vitor Rui Mendonça <Vitor.Mendonca at brisa.pt>
Subject: [rules-users] Entry-Points can cause NullPointerException and/or no rule firing
To: "Rules Users List" <rules-users at lists.jboss.org>
Date: Friday, May 14, 2010, 8:40 AM

Hi again.

First of all, I’m running Drools 5.1.0.SNAPSHOT on Windows and Eclipse 3.4.

I’ve submitted a Jira Issue (https://jira.jboss.org/jira/browse/JBRULES-2511 <https://jira.jboss.org/jira/browse/JBRULES-2511> ):

“

I've got a system that receives transactions. I want to implement the following rules: 
- raise an alarm(alarm event) when there aren't any transaction for an hour (or more); 
- if there's an alarm, no more alarms should be raised; 
- if there's an alarm and the system receives a transaction, that alarm should be retracted and the system should send an recovery event. 

I've implemented the rules this way: 
- ***start*** rule to insert an "EngineStart" event when the rules engine starts 
- ***notrx_after_start*** rule to detect absence of transactions during the first hour 
- ***notrx_after_trx*** rule to detect absence of transactions (during one hour) after last transaction 
- ***rearm*** rule to detect transactions and rearm the system. 

I made a Maven project with junits, which inserts transactions at specific time, in order to raise the desired events. 

Two set of tests were made: 
- the rules defined in "default" entry-point: the correspondent junit gives a NullPointerException in DefaultAgenda 
- the rules defined in "incoming" entry-point: the correspondent junit doesn't activate the ***rearm*** rule

“

The issue has an attachment with junits and rules to play with.

T.I.A.

Vítor Mendonça Moreira
Analista / Programador
Direcção de Investigação e Desenvolvimento

Rua Dr. Francisco Sá Carneiro, nº. 4 r/c esq.
2500 - 206 - Caldas da Rainha
Tel: (+351) 262 832 196
Fax: (+351) 262 186 455
Web: www.makewise.pt <http://www.makewise.pt> 
Uma empresa: Grupo Sousa Pedro <http://www.sousapedro.com>  

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