Re: [rules-users] Simple JBoss Rules Sample
Hi Robert, Have you tried the drools 4.0.0 examples ? http://labs.jboss.com/ drools/downloads regards Fernando Meyer http://fmeyer.org [EMAIL PROTECTED] PGP: 0xD804DDFB On Aug 3, 2007, at 1:33 AM, Robert Burdick wrote: Hello All: I am brand new to JBoss Rules / Drools development. I have found the examples with the version 3.0.6 download extremely unenlightening. Can anyone point me to a simple starter application to get a feel for how all of this works? A simple thick client GUI or command line application would be great. Preferably not just a collection og JUnit TestCases, but a real application, no matter how simple, that shows how to exercise the rules engine from Java would be very helpful to me. Thanks, Robert ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Simple JBoss Rules Sample
Try rbs.gernotstarke.de, I tried to clarify things a little. feedback welcome, it's just a start, regards, Gernot > Hello All: > > > > I am brand new to JBoss Rules / Drools development. I have found the > examples with the version 3.0.6 download extremely unenlightening. Can > anyone point me to a simple starter application to get a feel for how all > of > this works? A simple thick client GUI or command line application would > be > great. Preferably not just a collection og JUnit TestCases, but a real > application, no matter how simple, that shows how to exercise the rules > engine from Java would be very helpful to me. > > > > Thanks, Robert > > > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Dr. Gernot Starke Willi-Lauf Allee 43, D-50858 Köln Tel. +49 (0) 177 - 728 2570 Mail: [EMAIL PROTECTED] http://www.gernotstarke.de http://www.arc42.de ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Golfer Example: Why will the example get two equal result ?
a half answer: I behaved the same in 3.0.6... imho it's the "unknown" variables that get instantiated differently... but I did not investigate much further... suggestion: ignore - make your own rules behave better :-) Gernot > > > When I test the Golfer example in Drools4.0 environment. I found the rule > was matched twice but print same result. I try to override equals() and > hashCode() method in Golfer Object, but no change happen. Who can tell me > the reason that happened? > > > > Thanks. > > Jason Wang > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Dr. Gernot Starke Willi-Lauf Allee 43, D-50858 Köln Tel. +49 (0) 177 - 728 2570 Mail: [EMAIL PROTECTED] http://www.gernotstarke.de http://www.arc42.de ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Simple JBoss Rules Sample
Hello All: I am brand new to JBoss Rules / Drools development. I have found the examples with the version 3.0.6 download extremely unenlightening. Can anyone point me to a simple starter application to get a feel for how all of this works? A simple thick client GUI or command line application would be great. Preferably not just a collection og JUnit TestCases, but a real application, no matter how simple, that shows how to exercise the rules engine from Java would be very helpful to me. Thanks, Robert ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Golfer Example: Why will the example get two equal result ?
When I test the Golfer example in Drools4.0 environment. I found the rule was matched twice but print same result. I try to override equals() and hashCode() method in Golfer Object, but no change happen. Who can tell me the reason that happened? Thanks. Jason Wang ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to accumulate from objects in a collection?
Felipe, I think you were very close to doing it right. What about this: rule "remove used vacation days" no-loop when vr: VacationRequestVO($days: availableDays , $iniDate: initDate ) $u: UserVO( $vacReqList: vacationRequestList ) Number ($usedDays : intValue > 1) from accumulate ( VacationRequestVO( isAproved == true, endDate < $iniDate, $uDays: usedDays) from $vacReqList, sum($uDays)) then vr.setAvailableDays($days - $usedDays); end So, basically, what we are trying to do from a language perspective is to allow users to optionally provide a source for each pattern. So, if you simply write a pattern without a source, it comes from the working memory: MyClass( ... ) If you want him to come from another source, you use the "from" CE. As you did, it is possible to nest the "from CE" inside the "accumulate CE". Number(...) from accumulate( VacationRequestVO(...) from $vacRequeList ... ) The other change you needed in your rule is that as you are adding up quantities, you want to use the "sum" function instead of "count" function that is used to count occurrences. Try out and let us know... this is a nice rule to show language expressiveness. []s Edson 2007/8/2, Felipe Piccolini <[EMAIL PROTECTED]>: > > Hi, >this is just a dumb question for drools-languaje gurus... like Edson :) > > How ca I write a rule (CE in LHS) for accumulate atributes inside an > object, but this objects are not facts, > they are inside a collection which is an attribute from a fact... pretty > messy right?...lol.. > > well, the business problem is this. > > I need to count (accumulate) vacation days used on previous vacation > requests. > I have an User (which is one fact) having a collection of > oldVacationRequests > and an actual VacationRequest (the another fact). > So the rules is like this: discount to the available days for vacation > those used in previous > vacation request, and those days are the days between initDate and endDate > in each > old vacation request with isAproved seted true and having endDate before > the actual > vacation request initDate. > > did I explain myself?... > > > > so I need to know if this is possible I was trying to do something like > this...but is obviously wrong...:) > rule "remove used vacation days" > no-loop > when > vr: VacationRequestVO($days: availableDays , $iniDate: initDate ) > $u: UserVO( $vacReqList: vacationRequestList ) > $usedDays : Number (intValue > 1) from accumulate ( $ovr: > VacationRequestVO( isAproved == true, endDate < $iniDate, $uDays: usedDays), > from $vacReqList, count($uDays)) > then > vr.setAvailableDays($days - $usedDays); > end > > Thanks... > > *Felipe > Piccolini M.* > [EMAIL PROTECTED] > > > > > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] How to accumulate from objects in a collection?
Hi, this is just a dumb question for drools-languaje gurus... like Edson :) How ca I write a rule (CE in LHS) for accumulate atributes inside an object, but this objects are not facts, they are inside a collection which is an attribute from a fact... pretty messy right?...lol.. well, the business problem is this. I need to count (accumulate) vacation days used on previous vacation requests. I have an User (which is one fact) having a collection of oldVacationRequests and an actual VacationRequest (the another fact). So the rules is like this: discount to the available days for vacation those used in previous vacation request, and those days are the days between initDate and endDate in each old vacation request with isAproved seted true and having endDate before the actual vacation request initDate. did I explain myself?... so I need to know if this is possible I was trying to do something like this...but is obviously wrong...:) rule "remove used vacation days" no-loop when vr: VacationRequestVO($days: availableDays , $iniDate: initDate ) $u: UserVO( $vacReqList: vacationRequestList ) $usedDays: Number (intValue > 1) from accumulate ( $ovr: VacationRequestVO( isAproved == true, endDate < $iniDate, $uDays: usedDays), from $vacReqList, count($uDays)) then vr.setAvailableDays($days - $usedDays); end Thanks... Felipe Piccolini M. [EMAIL PROTECTED] ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] on update
Sergey, I don't think you will get the behavior you described, out of the box. What you can do, is delegate to the engine the actual update work. rule "on updated cost write to archive old value" when $cost : Cost( $oldAmount : amount ) $event : CostUpdateEvent( $newAmount : amount, object == $cost ) then //... write to archive $oldAmount $cost.setAmount( $newAmount ); update( $cost ); retract( $event ); end Right now, shadow facts don't expose it's cache for use in rules in a safe way. So, I believe something like the above is the best approach. []s Edson 2007/8/2, Manukyan, Sergey <[EMAIL PROTECTED]>: > > > Folks, > > I need a rule that will track changes to cost amount and do something > with his old value. > > Like that : > > rule "on updated cost write to archive old value" > when > cost : Cost() > old_cost : Cost(amount != cost.amount) // how can I > specify the OLD cost object before it was updated??? > then > ... write to archive $old_cost.amount > end > > > Is it possible at all? > > Something like in database system triggers, when you have "on update" > and then you have OLD value and NEW values available...? > > Thanks a lot! > > -Sergey > > > > ** > ** LEGAL DISCLAIMER ** > ** > > This E-mail message and any attachments may contain > legally privileged, confidential or proprietary > information. If you are not the intended recipient(s), > or the employee or agent responsible for delivery of > this message to the intended recipient(s), you are > hereby notified that any dissemination, distribution > or copying of this E-mail message is strictly > prohibited. If you have received this message in > error, please immediately notify the sender and > delete this E-mail message from your computer. > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] nested accessors with Sets
Mark, Hmmm, something is going on with mvel integration... bellow must work. There are work arounds (like using plain java code, or using multiple patterns), but I think we need to fix that. Can you please include this info in the ticket. Thanks, []s Edson 2007/8/2, [EMAIL PROTECTED] <[EMAIL PROTECTED]>: > > Edson, > > Thank you for the response. I tried writing the in-line eval as suggested > but get this Exception: > > org.drools.rule.InvalidRulePackage: Unable to determine the used > declarations : [Rule name=State, agendaGroup=MAIN, salience=0, > no-loop=false] >at org.drools.rule.Package.checkValidity(Package.java:408) >at org.drools.common.AbstractRuleBase.addPackage( > AbstractRuleBase.java:288) >at [...] > > This is my rule: > > rule State >dialect "mvel" >when >$ca:CandidateAssociation( eval ( ! > nurseDetails.stateLicensures.contains( patientDetails.state ) ) ) >then >retract( $ca ); > end > > I haven't yet but, plan to open an issue in JIRA as requested > > Thanks for your help. > Mark > > ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] on update
Folks, I need a rule that will track changes to cost amount and do something with his old value. Like that : rule "on updated cost write to archive old value" when cost : Cost() old_cost : Cost(amount != cost.amount) // how can I specify the OLD cost object before it was updated??? then ... write to archive $old_cost.amount end Is it possible at all? Something like in database system triggers, when you have "on update" and then you have OLD value and NEW values available...? Thanks a lot! -Sergey ** ** LEGAL DISCLAIMER ** ** This E-mail message and any attachments may contain legally privileged, confidential or proprietary information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this E-mail message is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this E-mail message from your computer. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] RuleML-2007 Challenge - Extended Deadlines, 7th/17th August
[Apologies for multiple postings] -- Extended Deadlines: August 7th/17th -- RuleML-2007 Challenge: Rule Technology Showcase October, 25th, 2007 - Orlando, Florida http://2007.ruleml.org/index-Dateien/Page787.htm With its unique emphasis on the practical use of rule technologies in distributed Web-based environments, RuleML-2007 will feature a Challenge with a focus on rule applications and rule-based tools. The challenge offers participants a unique possibility to demonstrate their commercial or open source tools, use cases, and applications. Those demo paper submissions that are received by August 7th, and accepted, will participate in the Challenge and be published in the Springer LNCS Proceedings. Those that are received a little later, but by August 17th very latest, and accepted, will participate in the Challenge and may be considered for publication in the Proceedings. Submissions of demo papers (3-5 pages) for the RuleML-2007 Challenge can be sent to ruleml2007 AT easychair.org. The RuleML-2007 Challenge is being held as part of the International RuleML Symposium on Rule Interchange and Applications (RuleML-2007: http://2007.ruleml.org/) - to be held in Orlando, Florida, on 25th/26th October, in co-location with the 10th Business Rules Forum. RuleML-2007 is devoted to practical distributed rule technologies and rule-based applications which need language standards for rules operating in the context of, e.g., the Semantic Web, Web 2.0/3.0, Intelligent Multi-Agent Systems, Event-Driven Architectures and Service-Oriented Computing Applications. For more information please visit: http://2007.ruleml.org/ Sincerely Yours, Adrian Paschke (RuleML-2007 Co-Chair) ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Why does Drools' RuleBase.addPackage() Behave ThisWay?
Mark, Thanks for the prompt response. I will certainly create a simplified program to demonstrate this problem and open a JIRA. As for the "non-optimized test rule set", I meant that I did not even using the new syntax in 4.0GA, such as "in" and "not in", when converting IRL to DRL. I converted all the in conditions to concatenated or's or "!=" for negations. All the rules also created without one condition that has been showing greatly improved performance in JRules. But Drools seems not needing it. The data set is exactly the same. By the way, I also like DRL a lot. -Ming From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Proctor Sent: Thursday, August 02, 2007 2:06 PM To: Rules Users List Cc: Shtarkman, Daniel Subject: Re: [rules-users] Why does Drools' RuleBase.addPackage() Behave ThisWay? Thanks for the feedback, glad it's working out faster for you. Btw have you tried our sequentail mode, thats even faster, especially for large data sets and where as JRule's sequential/fastpath modes limit the rule langauge available to you, we still allow you access to the full language. Also notice how we don't need to pool rule contexts like JRules, our single rulebase can be shared amount working memory sessions, making the management of sessions very light weight which simplifies your over all infrastructure. On the increasing times, that doesn't look good. Probably a bad loop or cache somewhere. Could you make a self contained project showing this behaviour and upload it as a jira, and we will track and hopefully move the bottlebeck. Hopefully JProfiler can shed some light. Btw what do you mean by "non-optimized test rule set and data" - just trying to understand so I can compare apples to apples. Mark Jin, Ming wrote: I am benchmarking Drools 4.0 and received excellent results in rule execution. With our non-optimized test rule set and data, Drools out performed ILOG/JRules by quite a bit. Congratulations to Drools' team for a job well done. I encountered a strange behavior when trying to test the performance of rule registration, meaning to add Package's to a new instance of RuleBase. I ran the same test 5 times in a sequence, and the RuleBase instance was discarded right away. The test ran with different different number of packages, 20, 50, 100, and 200. The results are as the followings: Added 20 packages to rulebase in 0:00:0.15 Added 20 packages to rulebase in 0:00:0.21 Added 20 packages to rulebase in 0:00:0.21 Added 20 packages to rulebase in 0:00:0.301 Added 20 packages to rulebase in 0:00:0.18 Added 20 packages to rulebase 5 times in 0:00:1.051 Added 50 packages to rulebase in 0:00:0.17 Added 50 packages to rulebase in 0:00:1.422 Added 50 packages to rulebase in 0:00:1.252 Added 50 packages to rulebase in 0:00:1.322 Added 50 packages to rulebase in 0:00:1.331 Added 50 packages to rulebase 5 times in 0:00:5.497 Added 100 packages to rulebase in 0:00:0.19 Added 100 packages to rulebase in 0:00:5.278 Added 100 packages to rulebase in 0:00:5.297 Added 100 packages to rulebase in 0:00:5.228 Added 100 packages to rulebase in 0:00:5.327 Added 100 packages to rulebase 5 times in 0:00:21.32 Added 200 packages to rulebase in 0:00:0.22 Added 200 packages to rulebase in 0:00:21.691 Added 200 packages to rulebase in 0:00:21.481 Added 200 packages to rulebase in 0:00:21.642 Added 200 packages to rulebase in 0:00:21.341 Added 200 packages to rulebase 5 times in 0:01:26.385 As you can see, the timing of creating first RuleBase instance is always good, while the subsequent one's were very bad. Is there an attribute I could adjust in configuration to improve the performance for this scenario? Please advise if there is other alternatives. I would be glad to provide details if needed. Your help is greatly appreciated! -Ming ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/li
Re: [rules-users] Why does Drools' RuleBase.addPackage() Behave This Way?
Thanks for the feedback, glad it's working out faster for you. Btw have you tried our sequentail mode, thats even faster, especially for large data sets and where as JRule's sequential/fastpath modes limit the rule langauge available to you, we still allow you access to the full language. Also notice how we don't need to pool rule contexts like JRules, our single rulebase can be shared amount working memory sessions, making the management of sessions very light weight which simplifies your over all infrastructure. On the increasing times, that doesn't look good. Probably a bad loop or cache somewhere. Could you make a self contained project showing this behaviour and upload it as a jira, and we will track and hopefully move the bottlebeck. Hopefully JProfiler can shed some light. Btw what do you mean by "non-optimized test rule set and data" - just trying to understand so I can compare apples to apples. Mark Jin, Ming wrote: I am benchmarking Drools 4.0 and received excellent results in rule execution. With our non-optimized test rule set and data, Drools out performed ILOG/JRules by quite a bit. Congratulations to Drools' team for a job well done. I encountered a strange behavior when trying to test the performance of rule registration, meaning to add Package's to a new instance of RuleBase. I ran the same test 5 times in a sequence, and the RuleBase instance was discarded right away. The test ran with different different number of packages, 20, 50, 100, and 200. The results are as the followings: Added 20 packages to rulebase in 0:00:0.15 Added 20 packages to rulebase in 0:00:0.21 Added 20 packages to rulebase in 0:00:0.21 Added 20 packages to rulebase in 0:00:0.301 Added 20 packages to rulebase in 0:00:0.18 Added 20 packages to rulebase 5 times in 0:00:1.051 Added 50 packages to rulebase in 0:00:0.17 Added 50 packages to rulebase in 0:00:1.422 Added 50 packages to rulebase in 0:00:1.252 Added 50 packages to rulebase in 0:00:1.322 Added 50 packages to rulebase in 0:00:1.331 Added 50 packages to rulebase 5 times in 0:00:5.497 Added 100 packages to rulebase in 0:00:0.19 Added 100 packages to rulebase in 0:00:5.278 Added 100 packages to rulebase in 0:00:5.297 Added 100 packages to rulebase in 0:00:5.228 Added 100 packages to rulebase in 0:00:5.327 Added 100 packages to rulebase 5 times in 0:00:21.32 Added 200 packages to rulebase in 0:00:0.22 Added 200 packages to rulebase in 0:00:21.691 Added 200 packages to rulebase in 0:00:21.481 Added 200 packages to rulebase in 0:00:21.642 Added 200 packages to rulebase in 0:00:21.341 Added 200 packages to rulebase 5 times in 0:01:26.385 As you can see, the timing of creating first RuleBase instance is always good, while the subsequent one's were very bad. Is there an attribute I could adjust in configuration to improve the performance for this scenario? Please advise if there is other alternatives. I would be glad to provide details if needed. Your help is greatly appreciated! -Ming ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] nested accessors with Sets
Edson,
Thank you for the response. I tried writing the in-line eval as suggested but
get this Exception:
org.drools.rule.InvalidRulePackage: Unable to determine the used declarations :
[Rule name=State, agendaGroup=MAIN, salience=0, no-loop=false]
at org.drools.rule.Package.checkValidity(Package.java:408)
at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:288)
at [...]
This is my rule:
rule State
dialect "mvel"
when
$ca:CandidateAssociation( eval ( !
nurseDetails.stateLicensures.contains( patientDetails.state ) ) )
then
retract( $ca );
end
I haven't yet but, plan to open an issue in JIRA as requested
Thanks for your help.
Mark
-- Original message --
From: "Edson Tirelli" <[EMAIL PROTECTED]>
>Mark,
>
>Sorry for not answering before. I was doing some research.
>What you found is a bug. Contains and not contains are supported
> operations in Drools, but the case you are facing is that you are using
> these operators with accessors expressions (e.g.
> nurseDetails.stateLicensures ). When an accessor expression is used, the
> engine converts the whole expression in an inline-eval. So what you are
> doing will be interpreted by the engine as:
>
>$ca:CandidateAssociation( eval ( nurseDetails.stateLicensures not
> contains patientDetails.state ) )
>
> Problem is that "not contains" is not a valid operator for MVEL. May I
> ask you please to open a JIRA for that? I will fix it asap.
>
> Meanwhile, to work around the problem you can either avoid the accessor
> path expression when using "contains/memberOf/matches" and their
> corresponding negations, or write the inline eval yourself, avoid a
> mistranslation by the engine. So, if you are using mvel dialect for your
> rule, you could write:
>
> rule XXX
> dialect "mvel"
> when
>$ca:CandidateAssociation( eval ( ! nurseDetails.stateLicensures.contains(
> patientDetails.state ) ) )
> then
>// do something
> end
>
> Please not that as you are explicitly declaring the mvel dialect for your
> rule, your consequence will also be an MVEL block.
>
> Sorry for the inconvenience. I will fix that for 4.0.1.
>
> Thanks,
> Edson
>
> 2007/8/1, [EMAIL PROTECTED] <[EMAIL PROTECTED]>:
> >
> >
> > Actually, it is still broken.
> >
> > This does not complain but it always executes the consequence, even when
> > the stateLicensures includes the state that in patientDetails.state
> >
> >$ca:CandidateAssociation(nurseDetails.stateLicensures not contains
> > patientDetails.state )
> >
> >
> > I also tried the following but it complains with an Exception
> >
> > $ca:CandidateAssignment(participantDetails.state not memberof
> > nurseDetails.stateLicensures )
> >
> >
> > org.drools.rule.InvalidRulePackage: [13,50]: unknown:13:50 Unexpected
> > token 'not'[13,93]: unknown:13:93 mismatched token:
> > [EMAIL PROTECTED],574:574=')',<13>,13:93]; expecting type LEFT_PAREN
> > at org.drools.rule.Package.checkValidity(Package.java:408)
> > at org.drools.common.AbstractRuleBase.addPackage(
> > AbstractRuleBase.java:288)
> >
> >
> > Is what I am trying to do supported by Drools?
> >
> > Thank you,
> > Mark
> >
> >
> > -- Original message --
> > From: [EMAIL PROTECTED]
> > > My rule now appears to be working after switching from the
> > "excludes" operator
> > > to the newer "not contains".
> > >
> > > This works:
> > > $ca:CandidateAssociation(nurseDetails.stateLicensures not contains
> > > patientDetails.state )
> > >
> > > This does not:
> > > $ca:CandidateAssociation(nurseDetails.stateLicensures excludes
> > > patientDetails.state )
> > >
> > >
> > > Mark
> > >
> > > -- Original message --
> > > From: [EMAIL PROTECTED]
> > > > Hello,
> > > >
> > > > Please excuse me if I have double posted - my first did not seem to
> > appear.
> > > >
> > > > I am wondering if the following is valid rule syntax. I am getting a
> > > stacktrace
> > > > when the rules fire that points to a ClassCastException on a HashSet
> > > >
> > > > I am using v4.0 GA.
> > > >
> > > > Thank you, Mark
> > > >
> > > >
> > > > rule StateMatch
> > > > when
> > > > $ca:CandidateAssociation(nurseDetails.stateLicensures excludes
> > > > patientDetails.state )
> > > > then
> > > > retract( $ca );
> > > > end
> > > >
> > > >
> > > > public class CandidateAssociation {
> > > > private PatientDetails patientDetails;
> > > > private NurseDetails nurseDetails;
> > > > private int overlapHours;
> > > >
> > > > public CandidateAssociation( PatientDetails patientDetails,
> > NurseDetails
> > > > nurseDetails) {
> > > > super();
> > > > this.patientDetails = patientDetails;
> > > > this.nurseDetails = nurseDetails;
> > > > overlapHours =
> > > > participantDetails.get
[rules-users] Why does Drools' RuleBase.addPackage() Behave This Way?
I am benchmarking Drools 4.0 and received excellent results in rule execution. With our non-optimized test rule set and data, Drools out performed ILOG/JRules by quite a bit. Congratulations to Drools' team for a job well done. I encountered a strange behavior when trying to test the performance of rule registration, meaning to add Package's to a new instance of RuleBase. I ran the same test 5 times in a sequence, and the RuleBase instance was discarded right away. The test ran with different different number of packages, 20, 50, 100, and 200. The results are as the followings: Added 20 packages to rulebase in 0:00:0.15 Added 20 packages to rulebase in 0:00:0.21 Added 20 packages to rulebase in 0:00:0.21 Added 20 packages to rulebase in 0:00:0.301 Added 20 packages to rulebase in 0:00:0.18 Added 20 packages to rulebase 5 times in 0:00:1.051 Added 50 packages to rulebase in 0:00:0.17 Added 50 packages to rulebase in 0:00:1.422 Added 50 packages to rulebase in 0:00:1.252 Added 50 packages to rulebase in 0:00:1.322 Added 50 packages to rulebase in 0:00:1.331 Added 50 packages to rulebase 5 times in 0:00:5.497 Added 100 packages to rulebase in 0:00:0.19 Added 100 packages to rulebase in 0:00:5.278 Added 100 packages to rulebase in 0:00:5.297 Added 100 packages to rulebase in 0:00:5.228 Added 100 packages to rulebase in 0:00:5.327 Added 100 packages to rulebase 5 times in 0:00:21.32 Added 200 packages to rulebase in 0:00:0.22 Added 200 packages to rulebase in 0:00:21.691 Added 200 packages to rulebase in 0:00:21.481 Added 200 packages to rulebase in 0:00:21.642 Added 200 packages to rulebase in 0:00:21.341 Added 200 packages to rulebase 5 times in 0:01:26.385 As you can see, the timing of creating first RuleBase instance is always good, while the subsequent one's were very bad. Is there an attribute I could adjust in configuration to improve the performance for this scenario? Please advise if there is other alternatives. I would be glad to provide details if needed. Your help is greatly appreciated! -Ming ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Drools 4.0 StateExampleWithDynamicRules Question
Hello, I am a new Drools user working my way through the examples. To test my understanding of how the rules work, I modified the StateExampleUsingSalience.drl file used in the StateExampleWithDynamicRules example. The result of my change conflicted with my understanding of how the rules should work. I made two modifications in the StateExampleUsingSalience.drl file. The two modifications (shown below) are the commenting out of the two lines in the RHS portion of the "B to D" rule. My understanding of how this would affect the result was: because the "D" State object never changes state to "State.FINISHED" the RHS portion of the "D to E" rule (shown below) would not execute because the first pattern in the LHS would fail to find a State object in working memory that met the criteria of the constraint groups defined within it. My question is: Why does the "D to E" rule in the StateExampleDynamicRules.drl execute the statements in the RHS portion of the rule? >From StateExampleUsingSalience.drl: My changes in this file are the two lines commented out in the RHS portion. rule "B to D" when State(name == "B", state == State.FINISHED ) d : State(name == "D", state == State.NOTRUN ) then //System.out.println(d.getName() + " finished" ); //d.setState( State.FINISHED ); end >From StateExampleDynamicRules.drl: This is the rule where I expected the RHS portion to NOT get executed because there aren't any State objects in working memory that have their name == "D" and its state == State.FINISHED because the setState( State.FINISHED ) was never executed on the "D" state object. rule "D to E" when State(name == "D", state == State.FINISHED ) e : State(name == "E", state == State.NOTRUN ) then System.out.println(e.getName() + " finished" ); e.setState( State.FINISHED ); end After my modifications, the output was: A finished B finished C finished E finished I did not expect the "E finished" message to be printed. Regards, Daren ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Update error: handle not found for object
Hi,
Please note that java.lang.Integer is an immutable class. So, what is
happening when you do:
unEntier++;
update(unEntier);
is that java is actually doing is creating another, different
java.lang.Integer object (using auto-boxing/unboxing).
What you need to do is:
rule "incrementation"
no-loop
when
unEntier : java.lang.Integer()
then
retract( unEntier );
unEntier++;
System.out.println("incrementation firing...");
insert(unEntier);
end
[]s
Edson
2007/8/2, hypnosat7 <[EMAIL PROTECTED]>:
>
>
> hi I have an exception after using an update
>
> This is my rule :
>
> package packageDrlTest
>
> #list any import classes here.
> import java.lang.Integer;
>
>
> #declare any global variables here
>
> rule "incrementation"
> no-loop
> when
> unEntier : java.lang.Integer()
> then
> unEntier++;
> System.out.println("incrementation firing...");
> update(unEntier);
>
> end
>
>
> when I execute my rule on this list of facts :
>
> List integerList = new ArrayList();
> integerList.add(Integer.valueOf(1));
> for (Object fact : integerList )
> {
> session.insert(fact); // session is a StatefulMemory
> }
>
> Update error: handle not found for object: 2. Is it in the working memory?
>
> détails :
>
> incrementation firing...
> org.drools.FactException: Update error: handle not found for object: 2. Is
> it in the working memory?
> at
> org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java
> :93)
> at
> packageDrlTest.Rule_incrementation_0.consequence
> (Rule_incrementation_0.java:9)
> at
> packageDrlTest.Rule_incrementation_0ConsequenceInvoker.evaluate
> (Rule_incrementation_0ConsequenceInvoker.java:22)
> at org.drools.common.DefaultAgenda.fireActivation(
> DefaultAgenda.java:545)
> at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java
> :509)
> at
> org.drools.common.AbstractWorkingMemory.fireAllRules(
> AbstractWorkingMemory.java:430)
> at
> org.drools.common.AbstractWorkingMemory.fireAllRules(
> AbstractWorkingMemory.java:392)
> --
> View this message in context:
> http://www.nabble.com/Update-error%3A-handle-not-found-for-object-tf4206369.html#a11965297
> Sent from the drools - user mailing list archive at Nabble.com.
>
>
> ___
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
--
Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
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Re: [rules-users] correlating two collects
Yury, Correlation can happen in many ways, but I would say your general approach is correct. Answering your questions: 1. Both collect and accumulate work (as it is today) on single patterns. This means whenever you are using collect, you could be using accumulate. Just have in mind that accumulate is more powerful and flexible that collect, but it is also heavier. So, if collect does what you need, go with collect, otherwise fall back to accumulate. 3. Collect is incremental (on 4.0 GA) for all working memory operations: insert/update/retract. Accumulate is always incremental for insert, but for modify and retract it is incremental only if you provide the "reverse" action in case you are using adhoc operations. If you are using accumulate functions, modify and retract are incremental if the function supports reverse calculation. []s Edson 2007/8/1, Yuri de Wit <[EMAIL PROTECTED]>: > > I am finally having some time to use collects. What I basically need > to do is to collect items from a list using a specific criteria, then > collect items from a diff list using another criteria, and finally > compare the groups collected using a 3rd criteria > > Here is what I am thinking: > > i : Item(type==A) > ig : ItemGroup(size>1) > collect Item(a==i.a, b==i.b, ... n==i.n) > > i2: Item(type==B) > ig2 : ItemGroup( size>1, > ga==ig.ga, gb==i.gb, ) > collect Item(a==i.a, b==i.b, ... n==i.n) > > 1) It is quite nice that any implementation of java.util.Collection > can be the resut of collect. ItemGroup here not only keeps hold of all > Items returned but has some aggregate properties (afaik, I cannot use > the aggregate functions with accumulate since I have multiple column > aggregation). > > 2) Am I on the right track? Or is there a better way? > > 3) Is the collect recomputed from scratch or incrementally every time > a new fact is asserted or updated? > > thanks > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Update error: handle not found for object
hi I have an exception after using an update
This is my rule :
package packageDrlTest
#list any import classes here.
import java.lang.Integer;
#declare any global variables here
rule "incrementation"
no-loop
when
unEntier : java.lang.Integer()
then
unEntier++;
System.out.println("incrementation firing...");
update(unEntier);
end
when I execute my rule on this list of facts :
List integerList = new ArrayList();
integerList.add(Integer.valueOf(1));
for (Object fact : integerList )
{
session.insert(fact); // session is a StatefulMemory
}
Update error: handle not found for object: 2. Is it in the working memory?
détails :
incrementation firing...
org.drools.FactException: Update error: handle not found for object: 2. Is
it in the working memory?
at
org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:93)
at
packageDrlTest.Rule_incrementation_0.consequence(Rule_incrementation_0.java:9)
at
packageDrlTest.Rule_incrementation_0ConsequenceInvoker.evaluate(Rule_incrementation_0ConsequenceInvoker.java:22)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:545)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:509)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:430)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:392)
--
View this message in context:
http://www.nabble.com/Update-error%3A-handle-not-found-for-object-tf4206369.html#a11965297
Sent from the drools - user mailing list archive at Nabble.com.
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Re: [rules-users] High Performance Rules Environment
Robert, This is a very complex evaluation to do, since most of the published benchmarks will give you different results for the same rules engine. :) Also, the first and third links you listed bellow, all refer to Drools 2.xseries that were not Rete complete implementations. Just to show you the difference between drools 2.x and 3.x, check this: http://blog.athico.com/2006/11/rush-hour-and-content-based-routing.html Drools 4.x is even faster for complex rules scenarios with lots of partial matches. The testimonies though are good for you to check out as they are recent testimonies. Best thing to do would be, if possible, to build a prototype with a use case closer to what you need and check the numbers out. We are sure that on a face to face performance comparison, you will be pleasant surprised with the power of the Drools rules engine. If you need help on the prototype, just mail the list, or if you want official support for it, just contact Red Hat. Regards, Edson 2007/8/1, Robert Mertens <[EMAIL PROTECTED]>: > > > I would be interested in any feedback from users who have used / are using > the JBoss Rules engine in a high performance environment. > > In order to justify the use of JBoss Rules / Drools, I need to be able to > reference implementations that are using this rule engine in a production > environment. > > The BRMS components that form part of release 4.0 allow it to be evaluated > alongside Ilog Rules and Blaze Advisor; however, I really need some case > studies that detail the numbers of facts and rules that are in production > use, and any related stability issues. > > To date, I have come across the following links : > > http://legacy.drools.codehaus.org/Testimonies > http://lists.jboss.org/pipermail/rules-users/2007-July/002097.html > http://geekswithblogs.net/cyoung/articles/54022.aspx - Microsoft's Rule > Engine Scalability Results - A comparison with Jess and Drools > > Does anybody know of any links to case studies, or performance > /scalability > tests? > > Thanks > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] rule name regular expression
Hi, yes, close to that:
name returns [String name]
: ID { $name = $ID.text; }
| STRING { $name = getString( $STRING.text ); }
;
So, a rule name can be either an ID or a STRING. ID is what you got
already:
ID
:
('a'..'z'|'A'..'Z'|'_'|'$'|'\u00c0'..'\u00ff')('a'..'z'|'A'..'Z'|'_'|'0'..'9'|'\u00c0'..'\u00ff')*
;
A String is a valid Java string... so pretty much anything enclosed in
either " or '.
STRING
: ('"' ( EscapeSequence | ~('\\'|'"') )* '"')
| ('\'' ( EscapeSequence | ~('\\'|'\'') )* '\'')
;
In other words, if you want to allow the user to write rule names and
don't want to bother in validating it, just enclose the rule name in " and
be done with it. The only thing that may be good is to limit the length of
the string... you may want to use a hard limit around 60 characters I guess.
[]s
Edson
[]s
Edson
2007/8/2, hypnosat7 <[EMAIL PROTECTED]>:
>
>
> No I mean how can I check the validity of the rule names before put it in
> a
> DB, maybe I have to look to DRL.g grammar file ?
> is it this :
>
> ID
> :
>
> ('a'..'z'|'A'..'Z'|'_'|'$'|'\u00c0'..'\u00ff')('a'..'z'|'A'..'Z'|'_'|'0'..'9'|'\u00c0'..'\u00ff')*
>
> thanks
>
>
>
> Mark Proctor wrote:
> >
> > There is no regexp for this. Easiest thing to do is make a package with
> > a single rule in it and pass it into a packagebuilder session.
> >
> > Mark
> > hypnosat7 wrote:
> >> Hi,
> >> When can I find the regular expression to check the validity of a
> rule
> >> name ?
> >> thanks
> >>
> >
> > ___
> > rules-users mailing list
> > rules-users@lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/rule-name-regular-expression-tf4201280.html#a11959690
> Sent from the drools - user mailing list archive at Nabble.com.
>
> ___
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
--
Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
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Re: [rules-users] Inheritance
yes.
In that Collect(...) will match anything that implements Collection, be
it List, ArrayList etc.
Mark
Heyns, Juan wrote:
If I have two objects asserted into working memory and the one is
inherited from the other will a rule such as the following fire on
both objects (Person and Employee):
Rule
When
Person( property == "bla" )
Then
[...]
End
Juan
"Employees of Lonmin Platinum ("Lonplats") are not authorised to conclude
electronic transactions or to enter into electronic agreements on behalf
of Lonplats. Any electronic signature (other than an advanced electronic
signature as defined in the Electronic Communications and Transactions
Act of 2003) added to a data message (such as an email or an attachment
to an (email) ostensibly on behalf of Lonplats by a Lonplats employee
shall
not be legally binding on Lonplats and Lonplats shall incur no
liability of
any nature whatsoever, directly or indirectly, arising from such act
on the
part of it's employee. It is further recorded that nothing (other than an
advanced electronic signature) inserted into any data message
emanating from Lonplats shall be construed as constituting an electronic
signature"
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Re: [rules-users] Re: nested accessors with Sets
Arjun, I guess your questions are about 2 different subjects. 1. The non-existence of an object is handled by the NOT CE. So, if you want to say: there is no Bus asserted into working memory, you simply say: not Bus() If you want to say: there is no red bus asserted into working memory, you simply say: not Bus( color == "red" ) In the above case, even if there is a blue bus asserted, but not a red one, the CE will evaluate to true. If you want to say: there is a MyComposedObject whose active attribute is false or none MyComposedObject at all, you could say something like: when MyComposedObject(active == false) or not MyComposedObject() Then //Action End http://labs.jboss.com/file-access/default/members/drools/freezone/docs/4.0.0.13773GA/html/ch06s05.html#d0e3622 2. The use of contains and memberOf constraints. They both work on collections and arrays. The "in" operator only works on explicit lists of values: Composer( this contains "abc" ) // valid Composer( this contains $anotherObject ) // valid Component( this memberOf $composer.components ) // valid Cheese( type in ( "stilton", $muzzarela, Cheese.PROVOLONE ) ) // valid The negation of all of these operators works the same. http://labs.jboss.com/file-access/default/members/drools/freezone/docs/4.0.0.13773GA/html/ch06s05.html#d0e2992 Please, read the docs and suggest improvements for everything that is not clear there. Thanks, Edson 2007/8/2, Arjun Dhar <[EMAIL PROTECTED]>: > > comcast.net> writes: > > > > > My rule now appears to be working after switching from the "excludes" > operator to the newer "not contains". > > > > This works: > > $ca:CandidateAssociation(nurseDetails.stateLicensures not contains > patientDetails.state ) > > > > This does not: > > $ca:CandidateAssociation(nurseDetails.stateLicensures excludes > patientDetails.state ) > > > > Mark > > > I was just about to post a question and I think this may be the answer to > my > problem as well. So let me confirm. > > Question) I hvae a rule > > When > obj: MyComposedObject(active == false) > Then > //Action > End > > .. the problem is, if the above object was never asserted; I still want it > to > execute. Luckily MyComposedObject is composend inside another object, so > can i > use the technique above as> > > When > obj: Composer( this not contains MyComposedObject) > End > > or even obj: Composer( this not in MyComposedObject) > > > ... My Composer simply composes the object and does not contain it in a > list. > > Q1) So would either or both "not contains" or "not in" work? > Q2) Or is "not contains" only for List or Collection type? what about > HashMaps > then? > Q3) Stretching my actual use case to its limits; if I want to write > conditions > over objects that were never asserted into the working memory (need to OR > them > with existing) ones, how do I do that? I understand technically it does > not > make sense to want conditions over objects one never asserted; ... but > please > think a moment. A person asserts Objects and due to some external factor > some > objects do not get asserted. Since he is aware of it, can he trap that > conidtion in the rule itself? > Example: Assertions --> (Object Type) A1, A2, A4 > > RULES: I never got Object type A3 so Do Notify Admin <-- How to write such > a > rule? > > I hope I'm able to express my use case. > > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] nested accessors with Sets
Mark,
Sorry for not answering before. I was doing some research.
What you found is a bug. Contains and not contains are supported
operations in Drools, but the case you are facing is that you are using
these operators with accessors expressions (e.g.
nurseDetails.stateLicensures ). When an accessor expression is used, the
engine converts the whole expression in an inline-eval. So what you are
doing will be interpreted by the engine as:
$ca:CandidateAssociation( eval ( nurseDetails.stateLicensures not
contains patientDetails.state ) )
Problem is that "not contains" is not a valid operator for MVEL. May I
ask you please to open a JIRA for that? I will fix it asap.
Meanwhile, to work around the problem you can either avoid the accessor
path expression when using "contains/memberOf/matches" and their
corresponding negations, or write the inline eval yourself, avoid a
mistranslation by the engine. So, if you are using mvel dialect for your
rule, you could write:
rule XXX
dialect "mvel"
when
$ca:CandidateAssociation( eval ( ! nurseDetails.stateLicensures.contains(
patientDetails.state ) ) )
then
// do something
end
Please not that as you are explicitly declaring the mvel dialect for your
rule, your consequence will also be an MVEL block.
Sorry for the inconvenience. I will fix that for 4.0.1.
Thanks,
Edson
2007/8/1, [EMAIL PROTECTED] <[EMAIL PROTECTED]>:
>
>
> Actually, it is still broken.
>
> This does not complain but it always executes the consequence, even when
> the stateLicensures includes the state that in patientDetails.state
>
>$ca:CandidateAssociation(nurseDetails.stateLicensures not contains
> patientDetails.state )
>
>
> I also tried the following but it complains with an Exception
>
> $ca:CandidateAssignment(participantDetails.state not memberof
> nurseDetails.stateLicensures )
>
>
> org.drools.rule.InvalidRulePackage: [13,50]: unknown:13:50 Unexpected
> token 'not'[13,93]: unknown:13:93 mismatched token:
> [EMAIL PROTECTED],574:574=')',<13>,13:93]; expecting type LEFT_PAREN
> at org.drools.rule.Package.checkValidity(Package.java:408)
> at org.drools.common.AbstractRuleBase.addPackage(
> AbstractRuleBase.java:288)
>
>
> Is what I am trying to do supported by Drools?
>
> Thank you,
> Mark
>
>
> -- Original message --
> From: [EMAIL PROTECTED]
> > My rule now appears to be working after switching from the
> "excludes" operator
> > to the newer "not contains".
> >
> > This works:
> > $ca:CandidateAssociation(nurseDetails.stateLicensures not contains
> > patientDetails.state )
> >
> > This does not:
> > $ca:CandidateAssociation(nurseDetails.stateLicensures excludes
> > patientDetails.state )
> >
> >
> > Mark
> >
> > -- Original message --
> > From: [EMAIL PROTECTED]
> > > Hello,
> > >
> > > Please excuse me if I have double posted - my first did not seem to
> appear.
> > >
> > > I am wondering if the following is valid rule syntax. I am getting a
> > stacktrace
> > > when the rules fire that points to a ClassCastException on a HashSet
> > >
> > > I am using v4.0 GA.
> > >
> > > Thank you, Mark
> > >
> > >
> > > rule StateMatch
> > > when
> > > $ca:CandidateAssociation(nurseDetails.stateLicensures excludes
> > > patientDetails.state )
> > > then
> > > retract( $ca );
> > > end
> > >
> > >
> > > public class CandidateAssociation {
> > > private PatientDetails patientDetails;
> > > private NurseDetails nurseDetails;
> > > private int overlapHours;
> > >
> > > public CandidateAssociation( PatientDetails patientDetails,
> NurseDetails
> > > nurseDetails) {
> > > super();
> > > this.patientDetails = patientDetails;
> > > this.nurseDetails = nurseDetails;
> > > overlapHours =
> > > participantDetails.getNumberOverlapHourCnt(nurseDetails);
> > > }
> > > [...]
> > > }
> > >
> > > public class NurseDetails {
> > > private Set stateLicensures = new HashSet();
> > > [...]
> > > }
> > > public class PatientDetails {
> > > private String state;
> > > [...]
> > > }
> > >
> > > --
> > > Firing Rules
> > > **
> > > org.drools.RuntimeDroolsException: Exception executing predicate
> > > [EMAIL PROTECTED]
> > > at
> > > org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java
> :197)
> > > at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:121)
> > > at
> > >
> > org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject
> (CompositeObje
> > > ctSinkAdapter.java:317)
> > > at
> > > org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:159)
> > > at org.drools.reteoo.Rete.assertObject(Rete.java:175)
> > > at
> > > org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
> > > at
> > > org.drools.reteoo.ReteooWorkingMemory.d
[rules-users] Inheritance
If I have two objects asserted into working memory and the one is
inherited from the other will a rule such as the following fire on both
objects (Person and Employee):
Rule
When
Person( property == "bla" )
Then
[...]
End
Juan
"Employees of Lonmin Platinum ("Lonplats") are not authorised to conclude
electronic transactions or to enter into electronic agreements on behalf
of Lonplats. Any electronic signature (other than an advanced electronic
signature as defined in the Electronic Communications and Transactions
Act of 2003) added to a data message (such as an email or an attachment
to an (email) ostensibly on behalf of Lonplats by a Lonplats employee shall
not be legally binding on Lonplats and Lonplats shall incur no liability of
any nature whatsoever, directly or indirectly, arising from such act on the
part of it's employee. It is further recorded that nothing (other than an
advanced electronic signature) inserted into any data message
emanating from Lonplats shall be construed as constituting an electronic
signature"___
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Re: [rules-users] LHS use of from with a static method
turns out for static fields there was an MVEL regression, this has been
picked up and fixed and will be part of 4.0.1 There where a number of
MVEL regressions, in both the MVEL engine and Tooling. 4.0.1 aims to fix
all of this, which will be out next week.
Mark
Heyns, Juan wrote:
Hello everyone
I have a rule:
rule "my rule name"
no-loop
when
Object1( $property1: property1 );
Object2( testvalue == "Test String" )
from StaticClass.aMethod($property1)
then
aFunction();
end
I cannot seem to get the StaticClass.aMethod to return anything but
null. I have a test case for this method somewhere else and it seems
to work fine. Is this a legal operation? Could it be that the version
I am using (jbossrules-4.0.0.11754MR2-bin) still does not have support
for this?
Regards
Juan
"Employees of Lonmin Platinum ("Lonplats") are not authorised to conclude
electronic transactions or to enter into electronic agreements on behalf
of Lonplats. Any electronic signature (other than an advanced electronic
signature as defined in the Electronic Communications and Transactions
Act of 2003) added to a data message (such as an email or an attachment
to an (email) ostensibly on behalf of Lonplats by a Lonplats employee
shall
not be legally binding on Lonplats and Lonplats shall incur no
liability of
any nature whatsoever, directly or indirectly, arising from such act
on the
part of it's employee. It is further recorded that nothing (other than an
advanced electronic signature) inserted into any data message
emanating from Lonplats shall be construed as constituting an electronic
signature"
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Re: [rules-users] Re: Production rules vs. ECA Rules
If anyone is interestined in creating a drools-eca extension module, to allow for ECA style event creation and handling, let me know, as its definitely something we would like to support. Mark Tomas Olsson wrote: Hi, I think one can say that in ECA there is a conceptually difference between events and conditions. Events are modeled explicitly as a separate concept outside the condition part. This can be a nice for modeling since you can separate the "event" that triggers rule execution from the internal conditions that governs what rules to execute. I have a paper that describes an SLA evaluator in terms of ECA implemented with Drools 2: http://www.sics.se/spot/document/QoS_using_SLA.pdf (see page 8). In short: the evaluator receives notifications and scheduled executions as events and reacts to them. Thus you can use JBoss Drools to implement ECA but you have to create the event model yourself. In an ECA engine this is already done for you and you get a language to somehow express the events. /Tomas [EMAIL PROTECTED] wrote: Hi Mark, in which constellations i should select ECAs? What is the difference between events in ECAs and the occurrence of a certain set of facts in WorkingMemory in case of production rules? In following document they classify ECAs and production rules both as reactive rules, but they state they are somehow different: http://www.pms.ifi.lmu.de/publikationen/PMS-FB/PMS-FB-2007-8/PMS-FB-2007-8-reactive-rules-on-the-web.pdf And they state that JBoss Rules is only for production rules. So can I use JBoss Rules for implementing ECAs? Thanks and best regards, Kioumars Date: Mon, 30 Jul 2007 19:20:51 +0100 From: Mark Proctor <[EMAIL PROTECTED]> Subject: Re: [rules-users] Production rules vs. ECA Rules To: Rules Users List Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=UTF-8; format=flowed ECA is really a specialised subset of Product Rules; focusing more on generic event generation and event handling. Mark [EMAIL PROTECTED] wrote: Dear List, In JBoss Rules documentation it is written that they can be used for production rules. But I frequently read also in other sources about ECA rules. Is there any significant difference between “ECA†and “Production†Rules? If yes, what? Thanks in advance for your feedback and best Regards, Kioumars ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Re: Production rules vs. ECA Rules
Hi, I think one can say that in ECA there is a conceptually difference between events and conditions. Events are modeled explicitly as a separate concept outside the condition part. This can be a nice for modeling since you can separate the "event" that triggers rule execution from the internal conditions that governs what rules to execute. I have a paper that describes an SLA evaluator in terms of ECA implemented with Drools 2: http://www.sics.se/spot/document/QoS_using_SLA.pdf (see page 8). In short: the evaluator receives notifications and scheduled executions as events and reacts to them. Thus you can use JBoss Drools to implement ECA but you have to create the event model yourself. In an ECA engine this is already done for you and you get a language to somehow express the events. /Tomas [EMAIL PROTECTED] wrote: Hi Mark, in which constellations i should select ECAs? What is the difference between events in ECAs and the occurrence of a certain set of facts in WorkingMemory in case of production rules? In following document they classify ECAs and production rules both as reactive rules, but they state they are somehow different: http://www.pms.ifi.lmu.de/publikationen/PMS-FB/PMS-FB-2007-8/PMS-FB-2007-8-reactive-rules-on-the-web.pdf And they state that JBoss Rules is only for production rules. So can I use JBoss Rules for implementing ECAs? Thanks and best regards, Kioumars Date: Mon, 30 Jul 2007 19:20:51 +0100 From: Mark Proctor <[EMAIL PROTECTED]> Subject: Re: [rules-users] Production rules vs. ECA Rules To: Rules Users List Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=UTF-8; format=flowed ECA is really a specialised subset of Product Rules; focusing more on generic event generation and event handling. Mark [EMAIL PROTECTED] wrote: Dear List, In JBoss Rules documentation it is written that they can be used for production rules. But I frequently read also in other sources about ECA rules. Is there any significant difference between “ECA†and “Production†Rules? If yes, what? Thanks in advance for your feedback and best Regards, Kioumars ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] LHS use of from with a static method
Hello everyone
I have a rule:
rule "my rule name"
no-loop
when
Object1( $property1: property1 );
Object2( testvalue == "Test String" )
from StaticClass.aMethod($property1)
then
aFunction();
end
I cannot seem to get the StaticClass.aMethod to return anything but
null. I have a test case for this method somewhere else and it seems to
work fine. Is this a legal operation? Could it be that the version I am
using (jbossrules-4.0.0.11754MR2-bin) still does not have support for
this?
Regards
Juan
"Employees of Lonmin Platinum ("Lonplats") are not authorised to conclude
electronic transactions or to enter into electronic agreements on behalf
of Lonplats. Any electronic signature (other than an advanced electronic
signature as defined in the Electronic Communications and Transactions
Act of 2003) added to a data message (such as an email or an attachment
to an (email) ostensibly on behalf of Lonplats by a Lonplats employee shall
not be legally binding on Lonplats and Lonplats shall incur no liability of
any nature whatsoever, directly or indirectly, arising from such act on the
part of it's employee. It is further recorded that nothing (other than an
advanced electronic signature) inserted into any data message
emanating from Lonplats shall be construed as constituting an electronic
signature"___
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[rules-users] Fwd: correlating two collects
second try... (this is actually happenning too often) -- Forwarded message -- From: Yuri de Wit <[EMAIL PROTECTED]> Date: Aug 1, 2007 9:38 PM Subject: correlating two collects To: Rules Users List I am finally having some time to use collects. What I basically need to do is to collect items from a list using a specific criteria, then collect items from a diff list using another criteria, and finally compare the groups collected using a 3rd criteria Here is what I am thinking: i : Item(type==A) ig : ItemGroup(size>1) collect Item(a==i.a, b==i.b, ... n==i.n) i2: Item(type==B) ig2 : ItemGroup( size>1, ga==ig.ga, gb==i.gb, ) collect Item(a==i.a, b==i.b, ... n==i.n) 1) It is quite nice that any implementation of java.util.Collection can be the resut of collect. ItemGroup here not only keeps hold of all Items returned but has some aggregate properties (afaik, I cannot use the aggregate functions with accumulate since I have multiple column aggregation). 2) Am I on the right track? Or is there a better way? 3) Is the collect recomputed from scratch or incrementally every time a new fact is asserted or updated? thanks ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] drools 4.0 compilation
While drools 2.x was limited to XML, 4.0 preference is for the DRL,
which is a none xml format. It doesn't produce a jar at the moment just
a binary Packaage instance, which you can serialise.
Mark
fuadhamidov wrote:
hi,
i developed my project using drools 2.5. now i want to upgrade to drools
4.0. in my project i
(1) create xml file,
(2) compile xml file & get jar file,
(3) save jar file
(4) and load jar file when i need to run rules
i was able to upgrade xml file to drools 4.0 xml format, but i can not do
necessary modification in code to compile xml and get "jar or any reloadable
file".
There is my code that is developed for drools 2.5. Can you help me to
upgrade it for drools 4.0?
void compile() throws Exception {
// read xml file, returns data in xml format
String rulecontent = readRuleFromFile();
byte[] bytes = null;
// codes for drools 2.5. i want to develop corresponding code for 4
statement bellow that runs with drools 4.0
// RuleSetReader reader = new RuleSetReader();
// RuleSet ruleSet = reader.read(new BufferedReader(new
StringReader(rulecontent)));
// RuleSetCompiler compiler = new RuleSetCompiler(ruleSet, "com.sample",
"knowledgeHelper");
// bytes = compiler.getBinaryDeploymentJar();
// some codes for drools 4.0, but it is not finilized
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromXml(new BufferedReader(new
StringReader(rulecontent)));
Package pkg = builder.getPackage();
//... and then what? how do it get bytecode from package?
//may be 3 statements are not necessary for compilation
// save to disk as a jar file
writeRuleToJar(bytes);
}
void runrule(Object usg) throws Exception {
// runs both, drools 2.5 and drools 4.0
ConflictResolver[] conflictResolvers = new ConflictResolver[] {
SalienceConflictResolver.getInstance(),
ComplexityConflictResolver.getInstance(),
FifoConflictResolver.getInstance() };
CompositeConflictResolver compositeConflictResolver = new
CompositeConflictResolver(conflictResolvers);
byte[] bytecode = readRuleFromJar();
// i can not develope this part also
// RuleBaseLoader loader = new
RuleBaseLoader(compositeConflictResolver);
// loader.addFromByteArray(bytecode);
// RuleBase ruleBase = loader.buildRuleBase();
// modification in code for drools 4.0
// WorkingMemory workingMemory = ruleBase.newWorkingMemory();
WorkingMemory workingMemory = ruleBase.newStatefulSession();
// workingMemory.assertObject(usg);
workingMemory.insert(usg);
workingMemory.fireAllRules();
}
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[rules-users] drools 4.0 compilation
hi,
i developed my project using drools 2.5. now i want to upgrade to drools
4.0. in my project i
(1) create xml file,
(2) compile xml file & get jar file,
(3) save jar file
(4) and load jar file when i need to run rules
i was able to upgrade xml file to drools 4.0 xml format, but i can not do
necessary modification in code to compile xml and get "jar or any reloadable
file".
There is my code that is developed for drools 2.5. Can you help me to
upgrade it for drools 4.0?
void compile() throws Exception {
// read xml file, returns data in xml format
String rulecontent = readRuleFromFile();
byte[] bytes = null;
// codes for drools 2.5. i want to develop corresponding code for 4
statement bellow that runs with drools 4.0
// RuleSetReader reader = new RuleSetReader();
// RuleSet ruleSet = reader.read(new BufferedReader(new
StringReader(rulecontent)));
// RuleSetCompiler compiler = new RuleSetCompiler(ruleSet, "com.sample",
"knowledgeHelper");
// bytes = compiler.getBinaryDeploymentJar();
// some codes for drools 4.0, but it is not finilized
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromXml(new BufferedReader(new
StringReader(rulecontent)));
Package pkg = builder.getPackage();
//... and then what? how do it get bytecode from package?
//may be 3 statements are not necessary for compilation
// save to disk as a jar file
writeRuleToJar(bytes);
}
void runrule(Object usg) throws Exception {
// runs both, drools 2.5 and drools 4.0
ConflictResolver[] conflictResolvers = new ConflictResolver[] {
SalienceConflictResolver.getInstance(),
ComplexityConflictResolver.getInstance(),
FifoConflictResolver.getInstance() };
CompositeConflictResolver compositeConflictResolver = new
CompositeConflictResolver(conflictResolvers);
byte[] bytecode = readRuleFromJar();
// i can not develope this part also
// RuleBaseLoader loader = new
RuleBaseLoader(compositeConflictResolver);
// loader.addFromByteArray(bytecode);
// RuleBase ruleBase = loader.buildRuleBase();
// modification in code for drools 4.0
// WorkingMemory workingMemory = ruleBase.newWorkingMemory();
WorkingMemory workingMemory = ruleBase.newStatefulSession();
// workingMemory.assertObject(usg);
workingMemory.insert(usg);
workingMemory.fireAllRules();
}
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Re: [rules-users] rule name regular expression
No I mean how can I check the validity of the rule names before put it in a
DB, maybe I have to look to DRL.g grammar file ?
is it this :
ID
:
('a'..'z'|'A'..'Z'|'_'|'$'|'\u00c0'..'\u00ff')('a'..'z'|'A'..'Z'|'_'|'0'..'9'|'\u00c0'..'\u00ff')*
thanks
Mark Proctor wrote:
>
> There is no regexp for this. Easiest thing to do is make a package with
> a single rule in it and pass it into a packagebuilder session.
>
> Mark
> hypnosat7 wrote:
>> Hi,
>> When can I find the regular expression to check the validity of a rule
>> name ?
>> thanks
>>
>
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>
>
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