[rules-users] How to write Drools rule basing on a changed property?
Requirement: 1) Rule When Person.address.address1 is changed THEN 2) Ideally we should have 2 objects, 1 for the old person instance, the other for the new person instance so contextually the LHS equals to oldPerson.address.address1 != newPerson.address.address1. A properties change listener might not be the best solution as it might span multiple calls and the property change could be done on the web layer which is out of the JBoss Drools knowledge session. Ivan -- View this message in context: http://drools.46999.n3.nabble.com/How-to-write-Drools-rule-basing-on-a-changed-property-tp3492926p3492926.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to write Drools rule basing on a changed property?
The agent that is responsible for the address change must take care to provide information about what it does. This could be done by creating an UpdateEvent fact referencing the Person fact and indicating the attribute (address). Or a listener reacts to the change and insert the UpdateEvent fact. Or you follow your ideally-we-should-have-2 idea. -W On 9 November 2011 09:29, kapokfly ivan.jiang...@foxmail.com wrote: Requirement: 1) Rule When Person.address.address1 is changed THEN 2) Ideally we should have 2 objects, 1 for the old person instance, the other for the new person instance so contextually the LHS equals to oldPerson.address.address1 != newPerson.address.address1. A properties change listener might not be the best solution as it might span multiple calls and the property change could be done on the web layer which is out of the JBoss Drools knowledge session. Ivan -- View this message in context: http://drools.46999.n3.nabble.com/How-to-write-Drools-rule-basing-on-a-changed-property-tp3492926p3492926.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ 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] Data Modeling for medical expert system
Hi Dirk, you might want to take a look at this: http://www.jboss.org/tohu This is an interesting but rather old project. We're also working on a slightly refactored version here: https://github.com/droolsjbpm/drools-chance/tree/master/drools-informer The project provides a dynamic question/answer framework and supports GUI interfaces. As for the /content/ of the questions, it seems that you need some medical vocabulary. Hand-coding enum-equivalent lists may be an overwhelming task, depending on how realistic your system has to be. We're dealing with similar problems in another project, including the predictive modelling techniques for the actual inference. If you want to share thoughts, let me know. Cheers Davide -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Data-Modeling-for-medical-expert-system-tp3490855p3492965.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to write Drools rule basing on a changed property?
Thanks, when I am saying person address is changed, our app only concerns about its initial value and its final value, any change in the middle, we don't care. Examples: person.address.address1 starts with 'my addr1' later a couple of changes were made, say its final value is 'my addr1', we treat it as no change and no middle rules should be fired. Even for the 2 objects approach, how I can write the rules to get the old and new object matched correctly? They are both Person instances without any identity to tell which one is the old which one is the new one, unless I enable some kinds of map/or list in the rule and one structure to host only new objects and the other one hosts only the old values? -- View this message in context: http://drools.46999.n3.nabble.com/How-to-write-Drools-rule-basing-on-a-changed-property-tp3492926p3492979.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Issues with Eclipse Excel Plugin for Drools Decision Tables
Don't use eclipse to edit Excel files. Use Excel. I've never managed to make this OLE editor works well (but it is a long long time I did not retry, although I don't think there is any major evolution of this editor since then) . You can instruct Eclipse to use Excel to edit your .xls files (see configuration of File Types in WindowPreferences), or rigth-click + open with system editor. The only thing to remember is to refresh your project if the Excel file is in a source folder. But the OLE Excel Eclipse editor is not a part of drools plugin (not sure your question should be here). You can find dozen of OLE editor for Eclipse on the net, if you really want to charge you with problems ... - Mail original - De: Schlüter Dr. Andreas andreas.schlue...@cirquent.de À: rules-users@lists.jboss.org Envoyé: Mardi 8 Novembre 2011 19:43:27 Objet: [rules-users] Issues with Eclipse Excel Plugin for Drools Decision Tables Hi all, I am trying out Drools with JBoss Tooling in Eclipse. Actually, much of it does not work for me, but since there were not many complaints about that, I think it must be due to my missing experience. But now I have a couple of things that seem like bugs to me. (BTW, I mainly use Eclipse 3.7, but I also installed 3.6 to see whether anything is better with that - which generally it isn't. I upgraded Jboss tools to one of the newest nightly builds which I do not like, but only that solved the issue that the rules language dialects could not be found. I am using drools 5.2.0) I gave up on the Audit trail which always said The selected audit log is empty... (but it isn't and this should have been resolved two years ago according to some mails, but I simply avoid using that view). What bothers me most is that the Excel Plugin shows really erratic behavior in my Eclipse (both versions of eclipse). It opens the Excel file once (I converted to Excel 2003 (*.xls) from my newer version), but on the second time it says Cannot create the in-place editor Reason: This is probably because there is no OLE editor registered against the type of file you were trying to access Details say: File does not exist, is not accessible to user or does not have the correct format. result=-2147287008.) Sometimes later on it will work again, sometimes it won't and Excel complains about another Application needing to complete its OLE requests (until I shut it down using task manager since there is no alternative since it does not accept any input anymore). Sometimes even saving changes fails, leaving a corrupt file. Is that common behavior that others experience as well or is it just a local configuration issue? (Usually, I have no issues with my installation and I am not aware of configuring anything apart from using the Eclipse update sites.) Thanks in advance for any hints, Andreas ___ 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] Data Modeling for medical expert system
Hi Davide and the other users too, thank you all for your interesting links. I´ll think that 'tohu' really seams the solution for that problem. I think it is rather interesting that after spending my first weeks on Drools reading the documentation I never saw any link pointing to 'tohu'. :) Thanks very much, I´ll share my experiences. Despite from being interested in this aproach, I have to adjust my tasks for being able to finish my Bachelor Thesis in the given amount of time. On Wed, 9 Nov 2011 00:53:18 -0800 (PST), Davide Sottara wrote: Hi Dirk, you might want to take a look at this: http://www.jboss.org/tohu This is an interesting but rather old project. We're also working on a slightly refactored version here: https://github.com/droolsjbpm/drools-chance/tree/master/drools-informer The project provides a dynamic question/answer framework and supports GUI interfaces. As for the /content/ of the questions, it seems that you need some medical vocabulary. Hand-coding enum-equivalent lists may be an overwhelming task, depending on how realistic your system has to be. We're dealing with similar problems in another project, including the predictive modelling techniques for the actual inference. If you want to share thoughts, let me know. Cheers Davide -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Data-Modeling-for-medical-expert-system-tp3490855p3492965.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Dirk Conzelmann IT-Services Telefon: +49.179.2237995 Email: i...@dirk-conzelmann.de Web: www.dirk-conzelmann.de ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Data Modeling for medical expert system
Hi Bruno, On Tue, 08 Nov 2011 18:46:45 +0100, Bruno Freudensprung wrote: Hi Dirk, Good to see that I am not the only one fighting with that question :-). I guess the general answer is: it depends on how large your enums might grow. For instance if your application is eventually supposed to help diagnosing (say) all MeSH diseases based on all MeSH symptoms, then an approach where every symptom and disease is a Java class is not an option; this would lead to so many classes that I doubt Drools user interface will handle that, or will be useful anyway (drop-down lists with thousands of items). Yes, Exactly! The opposite approach consists in creating a few root Java classes like (say) Disease and Symptom and to store the MeSH hierarchy into a name attribute. The obvious drawback of the approach is that when your end-users will have to write the rules, they will be left with problems like: when Symptom(name == well... what's the name of this MeSH category??) then Disease(name == hmmm... can't remember the exact name of the disease as normalized in MeSH...) end hehe yes, yes :) I've posted a message on this topic (subject: Thoughts about rule authoring) and Michael Anstis kindly suggested a technical answer. I am afraid it did not fit my needs, but it could fit yours :-). Ok, i'll search for that later. For the moment I have no solution (like an intermediate approach) to my problem: I am stuck with approach #2. I have the impression that my problem requires a very tight integration between my database (MeSH) and the Drools suggestion engine. If you have another approach, I would love to know it ;-). Yes, i'll let you know. btw. i received a pretty interesting message from 'davide' a few moments ago. http://www.jboss.org/tohu https://github.com/droolsjbpm/drools-chance/tree/master/drools-informer Maybe this will help you too :) Best regards, Bruno. Le 08/11/2011 17:43, Dirk Conzelmann a écrit : Hi everybody, I am using Drools as a part of my Bachelor Thesis. My job is to build an expert system for medical diagnoses. My Question: Is there a best practice known in modeling a variable list of questions and answers in Drools? Up to now I modeled the list of questions implementing Java Classes and Enums for each question/answer pair. But to be able to change those options easyly I need a higher abstraction level than simple Java Classes and Enums. Could someone show me an example how to implement this? I hope I have explained my question understandable :) ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Dirk Conzelmann IT-Services Telefon: +49.179.2237995 Email: i...@dirk-conzelmann.de Web: www.dirk-conzelmann.de ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Human Task - ERROR : JPAKnowledgeService.newStatefulKnowledgeSession ...
Hello all,
I get an exception while last line of below method executed :
public StatefulKnowledgeSession createSession() throws Exception {
/*
* Create the knowledgebase using the required bpmn and drl files
*/
KnowledgeBase kbase = readKnowledgeBase(HumanTask.bpmn);
EntityManagerFactory emf = Persistence.createEntityManagerFactory(
org.jbpm.persistence.jpa );
Environment env = KnowledgeBaseFactory.newEnvironment();
env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );
env.set( EnvironmentName.TRANSACTION_MANAGER,
TransactionManagerServices.getTransactionManager() );
env.set( EnvironmentName.GLOBALS, new MapGlobalResolver() );
Properties properties = new Properties();
properties.put(drools.processInstanceManagerFactory,
org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory);
properties.put(drools.processSignalManagerFactory,
org.jbpm.persistence.processinstance.JPASignalManagerFactory);
KnowledgeSessionConfiguration config =
KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);
return JPAKnowledgeService.newStatefulKnowledgeSession(kbase, config,
env);
}
its stack-trace is :
14:26:13,111 WARN [JtaTransactionManager] Participating in existing JTA
transaction, but no JTA TransactionManager or TransactionSychronizationRegistry
available:
java.lang.NullPointerException
at
org.drools.persistence.jta.JtaTransactionManager.registerTransactionSynchronization(JtaTransactionManager.java:221)
at
org.drools.persistence.SingleSessionCommandService.registerRollbackSync(SingleSessionCommandService.java:333)
at
org.drools.persistence.SingleSessionCommandService.init(SingleSessionCommandService.java:123)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)...
Can anyone help me to solve this problem ?
Thanks in advance
S.M.H.Jamali___
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rules-users@lists.jboss.org
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Re: [rules-users] How to write Drools rule basing on a changed property?
It seems that this is more of a technical problem on the Java side: how to register the fact that a certain property of an element has changed. You'll need somthing like a clone method. The old version of Person need and should not remain in Working Memory, but a simple wrapper fact referencing to the cloned Person object (not a fact!) would be required. Then you might do Person( $adress: adress ) Wrapper( $person: person, eval( $adress != $person.getAddress() ) ) -W On 9 November 2011 09:57, kapokfly ivan.jiang...@foxmail.com wrote: Thanks, when I am saying person address is changed, our app only concerns about its initial value and its final value, any change in the middle, we don't care. Examples: person.address.address1 starts with 'my addr1' later a couple of changes were made, say its final value is 'my addr1', we treat it as no change and no middle rules should be fired. Even for the 2 objects approach, how I can write the rules to get the old and new object matched correctly? They are both Person instances without any identity to tell which one is the old which one is the new one, unless I enable some kinds of map/or list in the rule and one structure to host only new objects and the other one hosts only the old values? -- View this message in context: http://drools.46999.n3.nabble.com/How-to-write-Drools-rule-basing-on-a-changed-property-tp3492926p3492979.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ 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] Bugs in Drools 5.3.0 break Fusion event processing
Richard,
This is great info. Yes, please open JIRA's for all 3 issues and we will
make sure this is fixed for the next release.
Thank you,
Edson
2011/11/9 Richard Calmbach rcalm...@gmail.com
I am making extensive use of the event processing features of the Drools
rule engine. Upgrading from Drools 5.2.0.Final to Drools 5.3.0.Final broke
47 of my unit tests and also broke my functional tests. There seem to be
multiple changes in Drools 5.3.0 that cause incorrect behavior and/or break
backward compatibility. Here are the results of my investigation so far.
Issue F1:
While tracking down the failures of my unit tests, I experimented with the
Broker example, and while probably not finding the root cause of the broken
unit tests, I nonetheless came across what clearly seems to be incorrect
behavior in the DefaultTimerJobInstance.call() method. The bug only reveals
itself after all input has been processed, so it is masked by the fact that
running the Broker demo through the entire sequence in stocktickstream.dat
(1100 lines) takes a long time. In order to reveal the problem more
quickly, run the demo with only the first 14 lines in stocktickstream.dat.
Do so for both the 5.2.0 Broker demo (against Drools 5.2.0) and the 5.3.0
Broker demo (against Drools 5.3.0). The Broker example code in both
versions is identical, so only the Drools-internal code changes matter.
When running the 5.2.0 Broker demo to the end, you get one
java.text.ParseException (given the structure of the example code, that's
expected, albeit not elegant, and not the focus of our investigation). In
particular, no matter how many lines stocktickstream.dat contains, you
always get exactly one ParseException at the end.
Contrast this with running the 5.3.0 Broker demo: At the end you get N
occurrences of java.text.ParseException, where N is the number of lines in
stocktickstream.dat. So for 14 lines you get 14 occurrences of
ParseException. Looking at two specific methods shows us why:
Method
org.drools.examples.broker.events.EventFeeder.FeedJob.execute(JobContext):
public void execute(JobContext context) {
this.sink.receive( ((FeedContext) context).event );
if ( this.source.hasNext() ) {
((FeedContext) context).setEvent( this.source.getNext() );
this.trigger.setNextFireTime( ((FeedContext)
context).getEvent().getDate() );
clock.scheduleJob( this,
context,
trigger );
}
}
Note in particular how this method already takes care of scheduling the
next job execution by updating the next fire time of the job's existing
FeedTrigger instance. Unfortunately, in Drools 5.3.0,
DefaultTimerJobInstance.call() does a duplicate scheduling of the same job:
Method org.drools.time.impl.DefaultTimerJobInstance.call():
public Void call() throws Exception {
this.trigger.nextFireTime(); // need to pop
if ( handle.isCancel() ) {
return null;
}
this.job.execute( this.ctx );
if ( handle.isCancel() ) {
return null;
}
// our triggers allow for flexible rescheduling
Date date = this.trigger.hasNextFireTime();
if ( date != null ) {
scheduler.internalSchedule( this );
}
return null;
}
So, every job is duplicated and that's why there are 2*N calls to
org.drools.examples.broker.events.StockTickPersister.load() instead of N.
I think the rescheduling inside DefaultTimerJobInstance.call() is
incorrect. For one, it breaks backward compatibility, and it is unexpected.
The job should be in charge of deciding whether there is another job to
schedule or what to do. Implicitly scheduling the next job just by updating
the trigger time is a little too much magic.
Issue F2:
This is the bug that causes my unit tests to fail. I have not pinpointed
the root cause, but it seems to have to do with the event scheduling Drools
does as part of its job execution mechanism. Its symptom is a
NullPointerException during insertion of an event. What makes it so tricky
is that with the out-of-the-box configuration, Drools catches such
exceptions in org.drools.time.impl.PseudoClockScheduler.runCallBacks() and
passes them to the aptly named DoNothingSystemEventListener, which
literally does nothing, not so much as logging (the methods are empty). So
you don't actually know that the event insertion failed, you only wonder
why your mock WorkingMemoryEventListener is telling you that your
expectations are not met. The stack trace (as copied from the Eclipse Debug
view, hence the unusual formatting) inside Drools is:
Date.getMillisOf(Date) line: 939
Date.compareTo(Date) line: 959
DefaultTimerJobInstance.compareTo(DefaultTimerJobInstance) line: 38
DefaultTimerJobInstance.compareTo(Object) line: 13
[rules-users] variables confusion Java/MVEL
Hi, I'm confused about when en where to use Java or MVEL in a rule. In the example below I want to replace openRes.getMasterExemplaar().getBruikbareExemplaren() with a variable. RHD: works with JAva expression: ListExemplaar bruikEx = openRes.getMasterExemplaar().getBruikbareExemplaren(); but I prefer to create the variable in the LHS, but Java doesn't work here. Should this be a MVEL expression or should JAVA allways be possible? rule GarandeerReservaties when garRes : GarandeerReservatieTaak(); openRes : Reservatie() from repFact.getReservatieRepository().findVandaagOpenstaandeReservaties(); ListExemplaar bruikEx =openRes.getMasterExemplaar().getBruikbareExemplaren(); eval(Reservatie.getVandaagOpenstaandeReservaties().size() 0 openRes.getMasterExemplaar().getBruikbareExemplaren().size() != 0) then //ListExemplaar bruikEx = openRes.getMasterExemplaar().getBruikbareExemplaren(); bruikEx.get(0).setStatus(ExemplaarStatus.MOMENTEEL_GERESERVEERD); openRes.setStatus(ReservatieStatus.GEGARANDEERD); System.out.println( Drools +drools.getRule().getName()+: ocr: +openRes.getAantalVandaagOpenstaandeConcurReservaties() + bruikex: +bruikEx.size() ); end (written in Dutch, but I think it will be ok to understand) br, Els -- View this message in context: http://drools.46999.n3.nabble.com/variables-confusion-Java-MVEL-tp3493632p3493632.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Bugs in Drools 5.3.0 break Fusion event processing
Just wondering : does these problems happends because you use clocks and jobs,
or is it general to fusion 5.3 ?
Did not migrate my project on 5.3 for now.
So do you think there is a risk, knowing that I only use very basic fusion
features ?
- Mail original -
De: Edson Tirelli ed.tire...@gmail.com
À: Rules Users List rules-users@lists.jboss.org
Envoyé: Mercredi 9 Novembre 2011 14:53:00
Objet: Re: [rules-users] Bugs in Drools 5.3.0 break Fusion event processing
Richard,
This is great info. Yes, please open JIRA's for all 3 issues and we will make
sure this is fixed for the next release.
Thank you,
Edson
2011/11/9 Richard Calmbach rcalm...@gmail.com
I am making extensive use of the event processing features of the Drools rule
engine. Upgrading from Drools 5.2.0.Final to Drools 5.3.0.Final broke 47 of my
unit tests and also broke my functional tests. There seem to be multiple
changes in Drools 5.3.0 that cause incorrect behavior and/or break backward
compatibility. Here are the results of my investigation so far.
Issue F1:
While tracking down the failures of my unit tests, I experimented with the
Broker example, and while probably not finding the root cause of the broken
unit tests, I nonetheless came across what clearly seems to be incorrect
behavior in the DefaultTimerJobInstance.call() method. The bug only reveals
itself after all input has been processed, so it is masked by the fact that
running the Broker demo through the entire sequence in stocktickstream.dat
(1100 lines) takes a long time. In order to reveal the problem more quickly,
run the demo with only the first 14 lines in stocktickstream.dat. Do so for
both the 5.2.0 Broker demo (against Drools 5.2.0) and the 5.3.0 Broker demo
(against Drools 5.3.0). The Broker example code in both versions is identical,
so only the Drools-internal code changes matter.
When running the 5.2.0 Broker demo to the end, you get one
java.text.ParseException (given the structure of the example code, that's
expected, albeit not elegant, and not the focus of our investigation). In
particular, no matter how many lines stocktickstream.dat contains, you always
get exactly one ParseException at the end.
Contrast this with running the 5.3.0 Broker demo: At the end you get N
occurrences of java.text.ParseException, where N is the number of lines in
stocktickstream.dat. So for 14 lines you get 14 occurrences of ParseException.
Looking at two specific methods shows us why:
Method
org.drools.examples.broker.events.EventFeeder.FeedJob.execute(JobContext):
public void execute(JobContext context) {
this.sink.receive( ((FeedContext) context).event );
if ( this.source.hasNext() ) {
((FeedContext) context).setEvent( this.source.getNext() );
this.trigger.setNextFireTime( ((FeedContext) context).getEvent().getDate() );
clock.scheduleJob( this,
context,
trigger );
}
}
Note in particular how this method already takes care of scheduling the next
job execution by updating the next fire time of the job's existing FeedTrigger
instance. Unfortunately, in Drools 5.3.0, DefaultTimerJobInstance.call() does a
duplicate scheduling of the same job:
Method org.drools.time.impl.DefaultTimerJobInstance.call():
public Void call() throws Exception {
this.trigger.nextFireTime(); // need to pop
if ( handle.isCancel() ) {
return null;
}
this.job.execute( this.ctx );
if ( handle.isCancel() ) {
return null;
}
// our triggers allow for flexible rescheduling
Date date = this.trigger.hasNextFireTime();
if ( date != null ) {
scheduler.internalSchedule( this );
}
return null;
}
So, every job is duplicated and that's why there are 2*N calls to
org.drools.examples.broker.events.StockTickPersister.load() instead of N.
I think the rescheduling inside DefaultTimerJobInstance.call() is incorrect.
For one, it breaks backward compatibility, and it is unexpected. The job should
be in charge of deciding whether there is another job to schedule or what to
do. Implicitly scheduling the next job just by updating the trigger time is a
little too much magic.
Issue F2:
This is the bug that causes my unit tests to fail. I have not pinpointed the
root cause, but it seems to have to do with the event scheduling Drools does as
part of its job execution mechanism. Its symptom is a NullPointerException
during insertion of an event. What makes it so tricky is that with the
out-of-the-box configuration, Drools catches such exceptions in
org.drools.time.impl.PseudoClockScheduler.runCallBacks() and passes them to the
aptly named DoNothingSystemEventListener, which literally does nothing, not
so much as logging (the methods are empty). So you don't actually know that the
event insertion failed, you only wonder why your mock
WorkingMemoryEventListener is telling you that your expectations are not met.
The stack trace (as copied from the Eclipse Debug view, hence the unusual
formatting) inside Drools is:
Date.getMillisOf(Date) line: 939
Re: [rules-users] variables confusion Java/MVEL
You cannot create variables on the Left Hand Side; there you can only bind (!) variable names (!) to matched facts or their attributes. -W On 9 November 2011 15:14, elsdestickere elsdestick...@yahoo.com wrote: Hi, I'm confused about when en where to use Java or MVEL in a rule. In the example below I want to replace openRes.getMasterExemplaar().getBruikbareExemplaren() with a variable. RHD: works with JAva expression: ListExemplaar bruikEx = openRes.getMasterExemplaar().getBruikbareExemplaren(); but I prefer to create the variable in the LHS, but Java doesn't work here. Should this be a MVEL expression or should JAVA allways be possible? rule GarandeerReservaties when garRes : GarandeerReservatieTaak(); openRes : Reservatie() from repFact.getReservatieRepository().findVandaagOpenstaandeReservaties(); ListExemplaar bruikEx =openRes.getMasterExemplaar().getBruikbareExemplaren(); eval(Reservatie.getVandaagOpenstaandeReservaties().size() 0 openRes.getMasterExemplaar().getBruikbareExemplaren().size() != 0) then //ListExemplaar bruikEx = openRes.getMasterExemplaar().getBruikbareExemplaren(); bruikEx.get(0).setStatus(ExemplaarStatus.MOMENTEEL_GERESERVEERD); openRes.setStatus(ReservatieStatus.GEGARANDEERD); System.out.println( Drools +drools.getRule().getName()+: ocr: +openRes.getAantalVandaagOpenstaandeConcurReservaties() + bruikex: +bruikEx.size() ); end (written in Dutch, but I think it will be ok to understand) br, Els -- View this message in context: http://drools.46999.n3.nabble.com/variables-confusion-Java-MVEL-tp3493632p3493632.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ 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
[rules-users] newbie: Can rules planner provide me with the single-steps to the optimal binpacking solution ?
Hello, I would like to solve a 2D binpacking problem. I have an existing bin-packing solution and would like to make it more optimized. Each change (movement of items between bins) has a certain cost, and I would like to have a list of the least-cost path. There is more than one solution that is optimal. Given an existing bin-packing solution I can tell if it is the optimal solution, and if not I can have a gross estimate to the distance to the optimal solution (although it is not guaranteed to be less than the actual distance). It sounds to me that I need something like the A-Star algorithm. Can Drools help me in solving this problem ? Thanks, Itai ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Issues with Eclipse Excel Plugin for Drools Decision Tables
Thanks for the feedback, I'll do it as you propose (although it is convenient for debugging the decision table to be able to stay in Eclipse). It looked to me as if it were part of the drools tooling since the editor opened up directly after creation of the decision table using the drools plugin, but you are right, it is probably not an issue of the JBoss tool itself. Andreas -- View this message in context: http://drools.46999.n3.nabble.com/Issues-with-Eclipse-Excel-Plugin-for-Drools-Decision-Tables-tp3491115p3493768.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Rule Flow: Diverge/Converge Issue with one-to-many paths being exected
Drools Version: 5.1 (We are looking into upgrading, but not an option at this time) I have need of a rule flow that will allow a diverge on one-to-many paths and then converge and continue on only once the paths that were executed have all finish. Say I have path A, B, C. The constraints on the diverge node indicate that A C should be executed simultaneously, but B should not. Then the converge node should wait for A and C to finish, but not care about B as it was not executed by the diverge. Initial attempt was to use Diverge(OR) and Converge(AND). The problem is that the Converge (I think) waits on B indefinitely and so the process exits out with no error message. It looks like n-of-m is kind of what I want, except I have no way to know how many paths the Diverge kicked off. Any thoughts on how this could be done? Much Appreciated! -- View this message in context: http://drools.46999.n3.nabble.com/Rule-Flow-Diverge-Converge-Issue-with-one-to-many-paths-being-exected-tp3493775p3493775.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Rule Flow: Diverge/Converge Issue with one-to-many paths being exected
Can you split it into two separate diverges? Diverge to B first and always follow the other path which then does the A C, Similarly at the other end wait for A C and then a second wait to add in the condition for B. Thomas -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users- boun...@lists.jboss.org] On Behalf Of dcrissman Sent: 09 November 2011 15:05 To: rules-users@lists.jboss.org Subject: [rules-users] Rule Flow: Diverge/Converge Issue with one-to-many paths being exected Drools Version: 5.1 (We are looking into upgrading, but not an option at this time) I have need of a rule flow that will allow a diverge on one-to-many paths and then converge and continue on only once the paths that were executed have all finish. Say I have path A, B, C. The constraints on the diverge node indicate that A C should be executed simultaneously, but B should not. Then the converge node should wait for A and C to finish, but not care about B as it was not executed by the diverge. Initial attempt was to use Diverge(OR) and Converge(AND). The problem is that the Converge (I think) waits on B indefinitely and so the process exits out with no error message. It looks like n-of-m is kind of what I want, except I have no way to know how many paths the Diverge kicked off. Any thoughts on how this could be done? Much Appreciated! -- View this message in context: http://drools.46999.n3.nabble.com/Rule-Flow- Diverge-Converge-Issue-with-one-to-many-paths-being-exected- tp3493775p3493775.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmas...@nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 ** ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Rule Flow: Diverge/Converge Issue with one-to-many paths being exected
Swindells, Thomas wrote: Can you split it into two separate diverges? Diverge to B first and always follow the other path which then does the A C, Similarly at the other end wait for A C and then a second wait to add in the condition for B. Thomas I am not sure I entirely follow your suggestion. A, B, C could fire in any combination, but always at least one. -- View this message in context: http://drools.46999.n3.nabble.com/Rule-Flow-Diverge-Converge-Issue-with-one-to-many-paths-being-exected-tp3493775p3493884.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] newbie: Can rules planner provide me with the single-steps to the optimal binpacking solution ?
Drools Planner can solve this problem for you. Here's a presentation that shows the code for a 3D bin packing problem: http://www.slideshare.net/ge0ffrey/judcon-london-2011-bin-packing-with-drools-planner-by-example To try it yourself, download the planner zip and run the example CloudBalance. Note that A* can't solve bin packing in scalable manner, because bin packing is np complete. Each change (movement of items between bins) has a certain cost, and I would like to have a list of the least-cost path. The roaddef2012 machinereassignement example (new on master) has the same problem. The trick is that each Assignment holds the time, changeCost, the originalBin and the newBin. The newBin is the planning variable. Then just add score rules that add the changeCost to the score when originalBin != newBin. Op 09-11-11 15:45, Itai Frenkel schreef: Hello, I would like to solve a 2D binpacking problem. I have an existing bin-packing solution and would like to make it more optimized. Each change (movement of items between bins) has a certain cost, and I would like to have a list of the least-cost path. There is more than one solution that is optimal. Given an existing bin-packing solution I can tell if it is the optimal solution, and if not I can have a gross estimate to the distance to the optimal solution (although it is not guaranteed to be less than the actual distance). It sounds to me that I need something like the A-Star algorithm. Can Drools help me in solving this problem ? Thanks, Itai ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- With kind regards, Geoffrey De Smet ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Rule Flow: Diverge/Converge Issue with one-to-many paths being exected
Hi, I do not reallt know whether there is a native way in jBPM to implement the m out of n-case you are describing. Anyway, imho, the easiest way to roundtrip this is probably this: Create a series of simple decision gateways: If(A has to execute), fire A; else do nothing; If (B has to execute); fire B; else do nothing;... Each time a task is not to be execute, the token will follow an empty path. You can use the or convergence to join the branches together again and lead them to the next divergence. Hope this helps. Regards, Frank dcrissman wrote: Swindells, Thomas wrote: Can you split it into two separate diverges? Diverge to B first and always follow the other path which then does the A C, Similarly at the other end wait for A C and then a second wait to add in the condition for B. Thomas I am not sure I entirely follow your suggestion. A, B, C could fire in any combination, but always at least one. -- View this message in context: http://drools.46999.n3.nabble.com/Rule-Flow-Diverge-Converge-Issue-with-one-to-many-paths-being-exected-tp3493775p3493922.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to write Drools rule basing on a changed property?
Yes, that is a Map base approach I am thinking. Now more questions: global MapObject, Object oldObjectContext WHEN $person: Person() eval(((Person)oldObjectContext[$name]).jobTitle == $person.name) THEN Q1: without eval, the compiler will report error Q2: without type cast, the compiler will also report error Any suggestion how we can make it easier? Thanks... -- View this message in context: http://drools.46999.n3.nabble.com/How-to-write-Drools-rule-basing-on-a-changed-property-tp3492926p3493956.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] rule does not fire at first event
Hi there, we use drools fusion 5.3. Final. In a drl-file, a fact and an event and the following rules are declared package ... etc declare ActivityState @role(fact) state : StateType end rule set initial state dialect java salience 100 when not (exists KFActivityState()) then ActivityState $actState = new ActivityState(); $actState.setState(StateType.STANDBY); insert($actState); System.out.println(ActivityState inserted + new Date()); end declare Command @role (event) end rule request information dialect java when Command(commandType == CommandType.REQUEST_INFORMATION) from entry-point XXX $s: ActivityState(state == ComponentStateType.ACTIVE||state == ComponentStateType.PASSIVE||state == ComponentStateType.STANDBY) then System.out.println(Send Report); end The rule request information doesn't fire with the first command event, but from the second one it fires always. What's wrong with my code? Thanks in advance Ulrich -- View this message in context: http://drools.46999.n3.nabble.com/rule-does-not-fire-at-first-event-tp3494056p3494056.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Security test cases for Drools
Not sure if anyone can share their experiences what kind of test cases on Drools security should be developed and ensured? As the rule is just a piece of codes in String format which can be hooked into JVM, we can assume that might open some holes and necessary security test cases need to be designed against. Anyone can share their experiences on this? Thanks... -- View this message in context: http://drools.46999.n3.nabble.com/Security-test-cases-for-Drools-tp3494072p3494072.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] integrate guvnor UI into your own application
Anyone tried to integrate the guvnor UI into your own application？ Basically we want to have a integrated, uniformed UI with our application rather than a separate one like Drools Guvnor does... -- View this message in context: http://drools.46999.n3.nabble.com/integrate-guvnor-UI-into-your-own-application-tp3494093p3494093.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Human Task - ERROR : JPAKnowledgeService.newStatefulKnowledgeSession ...
You will need to solve that problem. looks like a configuration problem,
can you share the persistence.xml file? did you configure persistence with
JTA?
Cheers
2011/11/9 S.M.H.Jamali cpp...@yahoo.com
Hello all,
I get an exception while last line of below method executed :
public StatefulKnowledgeSession createSession() throws Exception {
/*
* Create the knowledgebase using the required bpmn and drl files
*/
KnowledgeBase kbase = readKnowledgeBase(HumanTask.bpmn);
EntityManagerFactory emf = Persistence.createEntityManagerFactory(
org.jbpm.persistence.jpa );
Environment env = KnowledgeBaseFactory.newEnvironment();
env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );
env.set( EnvironmentName.TRANSACTION_MANAGER,
TransactionManagerServices.getTransactionManager() );
env.set( EnvironmentName.GLOBALS, new MapGlobalResolver() );
Properties properties = new Properties();
properties.put(drools.processInstanceManagerFactory,
org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory);
properties.put(drools.processSignalManagerFactory,
org.jbpm.persistence.processinstance.JPASignalManagerFactory);
KnowledgeSessionConfiguration config =
KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);
return JPAKnowledgeService.newStatefulKnowledgeSession(kbase,
config, env);
}
its stack-trace is :
14:26:13,111 WARN [JtaTransactionManager] Participating in existing JTA
transaction, but no JTA TransactionManager or
TransactionSychronizationRegistry available:
java.lang.NullPointerException
at
org.drools.persistence.jta.JtaTransactionManager.registerTransactionSynchronization(JtaTransactionManager.java:221)
at
org.drools.persistence.SingleSessionCommandService.registerRollbackSync(SingleSessionCommandService.java:333)
at
org.drools.persistence.SingleSessionCommandService.init(SingleSessionCommandService.java:123)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)...
Can anyone help me to solve this problem ?
Thanks in advance
S.M.H.Jamali
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Re: [rules-users] integrate guvnor UI into your own application
If your application is a web application then you can try this solution: http://ilesteban.wordpress.com/2010/11/23/guvnor-embed-assets-editor-in-your-application/ Best Regards, Esteban Aliverti - Developer @ http://www.plugtree.com - Blog @ http://ilesteban.wordpress.com On Wed, Nov 9, 2011 at 5:48 PM, kapokfly ivan.jiang...@foxmail.com wrote: Anyone tried to integrate the guvnor UI into your own application？ Basically we want to have a integrated, uniformed UI with our application rather than a separate one like Drools Guvnor does... -- View this message in context: http://drools.46999.n3.nabble.com/integrate-guvnor-UI-into-your-own-application-tp3494093p3494093.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ 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] Security test cases for Drools
Against external attacks, Drools supports knowledge base signing and checking using standard asymmetric keys infrastructure. Regarding the web application, I will let one of the guvnor guys to talk about. Against internal attacks, i.e., someone deliberately adding a malicious rule into the application, the only way is through company policies and processes that ensure a workflow for rule approval. Drools offers audit logs (runtime) and standard versioning history (in guvnor, authoring time) to track changes. Edson On Wed, Nov 9, 2011 at 11:42 AM, kapokfly ivan.jiang...@foxmail.com wrote: Not sure if anyone can share their experiences what kind of test cases on Drools security should be developed and ensured? As the rule is just a piece of codes in String format which can be hooked into JVM, we can assume that might open some holes and necessary security test cases need to be designed against. Anyone can share their experiences on this? Thanks... -- View this message in context: http://drools.46999.n3.nabble.com/Security-test-cases-for-Drools-tp3494072p3494072.html Sent from the Drools: User forum 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 JBoss Drools Core Development JBoss by 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 does not fire at first event
Are you calling the fireAllRules() method after inserting the events? or using fireUntilHalt()? You can activate the log to see what is happening with: KnowledgeRuntimeLoggerFactory.newConsoleLogger(session); Cheers On Wed, Nov 9, 2011 at 1:37 PM, ukriegel ulrich.krie...@isst.fraunhofer.dewrote: Hi there, we use drools fusion 5.3. Final. In a drl-file, a fact and an event and the following rules are declared package ... etc declare ActivityState @role(fact) state : StateType end rule set initial state dialect java salience 100 when not (exists KFActivityState()) then ActivityState $actState = new ActivityState(); $actState.setState(StateType.STANDBY); insert($actState); System.out.println(ActivityState inserted + new Date()); end declare Command @role (event) end rule request information dialect java when Command(commandType == CommandType.REQUEST_INFORMATION) from entry-point XXX $s: ActivityState(state == ComponentStateType.ACTIVE||state == ComponentStateType.PASSIVE||state == ComponentStateType.STANDBY) then System.out.println(Send Report); end The rule request information doesn't fire with the first command event, but from the second one it fires always. What's wrong with my code? Thanks in advance Ulrich -- View this message in context: http://drools.46999.n3.nabble.com/rule-does-not-fire-at-first-event-tp3494056p3494056.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - CTO @ http://www.plugtree.com - MyJourney @ http://salaboy.wordpress.com - Co-Founder @ http://www.jugargentina.org - Co-Founder @ http://www.jbug.com.ar - Salatino Salaboy Mauricio - ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] integrate guvnor UI into your own application
Nice, will give a try. Another 2 questions you might be able to help: 1) The Guvnor UI is basing on technical models which is hard for a business user to understand, especially when the current technical models implementation is not so good (for example, not straightforward relationship etc), is it possible to plugin another translation layer which allows business user to see a nice business model and define rules as they like, the system internally map to the technical models? 2) Looks like the Guvnor UI editor does not support field expression in value field, for example, person.name == person.aliasName, are we able to enhance that? With your experience, do you see any major functionality Drools Guvnor is missing? Thanks again... -- View this message in context: http://drools.46999.n3.nabble.com/integrate-guvnor-UI-into-your-own-application-tp3494093p3494161.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Security test cases for Drools
Thanks Edson. We are developing a web based UI (if possible embed guvnor into our application) and open the ability to customers to define their own rules, so a company policy on this won't work. Will evaluate other concern points and have more discussions on this. Ivan -- View this message in context: http://drools.46999.n3.nabble.com/Security-test-cases-for-Drools-tp3494072p3494170.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Issues with Eclipse Excel Plugin for Drools Decision Tables
Actually, your proposal does not work as expected: While Eclipse is open, it locks the file. If I edit it with Excel, be it directly from the OS or via configuration of the filetype, I therefore cannot save it. So it is like change the excel file-startup eclipse -click refresh - get compilation Error - shutdown eclipse - correct error in excel - startup eclipse - click refresh -... Is this really the way it is supposed to work? Is anybody at all using the Excel spreadsheet feature in a real application? How do they do it? I am using OOTB Eclipse, Drools, etc., and this is the first effect that I receive. How can that be the case if people are using this? Probably I need a commercial training course to start using the Eclipse Drools editors, does anyone have a recommendation where to get this? (Or is it just an Eclipse training course?) Thanks again, Andreas -- View this message in context: http://drools.46999.n3.nabble.com/Issues-with-Eclipse-Excel-Plugin-for-Drools-Decision-Tables-tp3491115p3494332.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Enumerations for nested classes
Hi all, I have a problem with data enumeration for nested classes in BRLs. I have two classes, Promotion and Program. Promotion has a property named program of type Program, which has a string property called code. I did a couple of enumeration in this way: [Program.code] = ['ABC=First Program','XYZ=Second Program'] [Promotion.program.code] = ['ABC=First Program','XYZ=Second Program'] With decision table they work as expected, but in BRL rules only the first works (the one with no nested classes), while in the other case the drop-down list doesn't appear and it's shown only a free editable field. How can it be? Should I write something in a different way? Is it a bug? I'm using version 5.2. Thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/Enumerations-for-nested-classes-tp3494392p3494392.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Issues with Eclipse Excel Plugin for Drools Decision Tables
Eclipse does not lock files, none of them, including xls ... May be you have an excel process still in execution (not killed by buggy OLEEditor) that keeps some locks ? OOTB Eclipse ? don't know what it is, but may be the problem is here ? I do use Excel spreadsheet in real applications. But in real applications, real users are not under eclipse... And me, under Eclipse, never experienced such boring procedures, as soon as I banned OLEEditor ... and put my XLS outside source code to avoid refreshing (put them in a resource dir, something external to intern code, because rules are evolving). And once again, XLS eclipse editor is part of eclipse, not drools plugin. In fact, I am pretty sure that this OLE Editor is more there as a demo to embed OLE components (still not understand the utility to transform something portable to win-specific ...), rather than a real supported feature ... but it is my opinion. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Enumerations for nested classes
bug : https://issues.jboss.org/browse/GUVNOR-1573 fixed in 5.3 But I think you does not need your second enum. Guvnor will infer that (in 5.3). - Mail original - De: gab acque_profo...@yahoo.it À: rules-users@lists.jboss.org Envoyé: Mercredi 9 Novembre 2011 19:26:00 Objet: [rules-users] Enumerations for nested classes Hi all, I have a problem with data enumeration for nested classes in BRLs. I have two classes, Promotion and Program. Promotion has a property named program of type Program, which has a string property called code. I did a couple of enumeration in this way: [Program.code] = ['ABC=First Program','XYZ=Second Program'] [Promotion.program.code] = ['ABC=First Program','XYZ=Second Program'] With decision table they work as expected, but in BRL rules only the first works (the one with no nested classes), while in the other case the drop-down list doesn't appear and it's shown only a free editable field. How can it be? Should I write something in a different way? Is it a bug? I'm using version 5.2. Thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/Enumerations-for-nested-classes-tp3494392p3494392.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ 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] Data Modeling for medical expert system
Tohu is a relatively old, unofficial and inactive project. We're refactoring that as drools-informer, but that's work in progress and I'm not sure the jQuery web client that comes with tohu would still work. So I'd recommend to stick to tohu for your thesis (especially giving your time constraints :)) Feel free to contact me (dso...@gmail.com) if you have questions. I'm sort-of-in-co-charge of monitoring drools research and I normally tutor bachelor/master students at the university. So, I'd be happy to share advice in exchange for information on where and how drools is being used as a research platform ;) -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Data-Modeling-for-medical-expert-system-tp3490855p3494429.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] integrate guvnor UI into your own application
1) You can put a bridge\adapter layer in between your object model and that used in Guvnor, but there is nothing in Guvnor itself. 2) Guvnor does support field expressions in the BRL (Business Rule - Guided Editor). When defining a field constraint select Expression. There were some good improvements for 5.2 and 5.3. On 9 November 2011 17:07, kapokfly ivan.jiang...@foxmail.com wrote: Nice, will give a try. Another 2 questions you might be able to help: 1) The Guvnor UI is basing on technical models which is hard for a business user to understand, especially when the current technical models implementation is not so good (for example, not straightforward relationship etc), is it possible to plugin another translation layer which allows business user to see a nice business model and define rules as they like, the system internally map to the technical models? 2) Looks like the Guvnor UI editor does not support field expression in value field, for example, person.name == person.aliasName, are we able to enhance that? With your experience, do you see any major functionality Drools Guvnor is missing? Thanks again... -- View this message in context: http://drools.46999.n3.nabble.com/integrate-guvnor-UI-into-your-own-application-tp3494093p3494161.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ 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] variables confusion Java/MVEL
Thanks for the insight, br, Els --- On Wed, 11/9/11, Wolfgang Laun wolfgang.l...@gmail.com wrote: From: Wolfgang Laun wolfgang.l...@gmail.com Subject: Re: [rules-users] variables confusion Java/MVEL To: Rules Users List rules-users@lists.jboss.org Date: Wednesday, November 9, 2011, 3:35 PM You cannot create variables on the Left Hand Side; there you can only bind (!) variable names (!) to matched facts or their attributes. -W On 9 November 2011 15:14, elsdestickere elsdestick...@yahoo.com wrote: Hi, I'm confused about when en where to use Java or MVEL in a rule. In the example below I want to replace openRes.getMasterExemplaar().getBruikbareExemplaren() with a variable. RHD: works with JAva expression: ListExemplaar bruikEx = openRes.getMasterExemplaar().getBruikbareExemplaren(); but I prefer to create the variable in the LHS, but Java doesn't work here. Should this be a MVEL expression or should JAVA allways be possible? rule GarandeerReservaties when garRes : GarandeerReservatieTaak(); openRes : Reservatie() from repFact.getReservatieRepository().findVandaagOpenstaandeReservaties(); ListExemplaar bruikEx =openRes.getMasterExemplaar().getBruikbareExemplaren(); eval(Reservatie.getVandaagOpenstaandeReservaties().size() 0 openRes.getMasterExemplaar().getBruikbareExemplaren().size() != 0) then //ListExemplaar bruikEx = openRes.getMasterExemplaar().getBruikbareExemplaren(); bruikEx.get(0).setStatus(ExemplaarStatus.MOMENTEEL_GERESERVEERD); openRes.setStatus(ReservatieStatus.GEGARANDEERD); System.out.println( Drools +drools.getRule().getName()+: ocr: +openRes.getAantalVandaagOpenstaandeConcurReservaties() + bruikex: +bruikEx.size() ); end (written in Dutch, but I think it will be ok to understand) br, Els -- View this message in context: http://drools.46999.n3.nabble.com/variables-confusion-Java-MVEL-tp3493632p3493632.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -Inline Attachment Follows- ___ 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
[rules-users] [Planner] CachedMoveFactory drive to Corrupted undo move
Hello,
I'm almost new to Drools Planner, and i run into some problems.
One of them, I really want to understand is that my Planner works well until
i try to use a CachedMoveFactory instead of my MoveFactory, then i've got
Corrupted undo move at step 2.
Assigment are my PlanningEntity, Day are facts
My MoveFactory is like this :
for (final Assigment assigment: mySolution.getAllAssigments()) {
for (final Day day : mySolution.getAllDays()) {
moveList.add(new PlanMove(assigment, day));
}
}
And my doMove is like :
final FactHandle factHandle = workingMemory.getFactHandle(assigment);
assigment.setDay(toDay);
workingMemory.update(factHandle, assigment);
The UndoMove is really simple (new PlanMove(assigment, fromDay)) , so I
pretty sure this part is correct.
I have add a false day(future=true) which mean not plannified yet and all
assigment start at this day.
I have a rule like :
rule notPlannified
when
$assigment: Assigment( day.future )
then
insertLogical(new IntConstraintOccurrence(notPlannified,
ConstraintType.NEGATIVE_SOFT, 50, $assigment));
end
My logs show :
INFO Phase construction heuristic finished: step total (0), time spend
(255), best score (0hard/-18750soft).
DEBUG Step index (0), time spend (2175), score (0hard/-18700soft), new
best score (0hard/-18700soft), accepted move size (1000) for picked step
([A148@[UNAFFECT]] == [12/11]).
Someone can explain me what I miss ?
Thanks.
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Re: [rules-users] Bugs in Drools 5.3.0 break Fusion event processing
Edson: Thanks for the quick reply. I created these JIRA issues: F1: Duplicate job scheduling in org.drools.time.impl.DefaultTimerJobInstance.call() - https://issues.jboss.org/browse/JBRULES-3284 F2: NullPointerException in org.drools.time.impl.DefaultTimerJobInstance.compareTo(DefaultTimerJobInstance) - https://issues.jboss.org/browse/JBRULES-3285 F3: org.drools.time.TimerService.scheduleJob(Job, JobContext, Trigger) suddenly requires non-null JobContext - https://issues.jboss.org/browse/JBRULES-3286 While you are working on the event scheduling system, you may also want to look at these two earlier bug reports for Drools 5.2.0: Long.MAX_VALUE duration for A and not(B after A) type rules causes invalid session clock time in rule RHS when running with pseudo clock - https://issues.jboss.org/browse/JBRULES-3100 A and not(B after A) type rules don't fire when session clock has negative values (pre Unix epoch) - https://issues.jboss.org/browse/JBRULES-3103 I have not checked their status in Drools 5.3.0, but the description should tell you whether they still apply. FWIW, among all of these, F2 (JBRULES-3285) has the highest priority (as it's breaking my unit tests), followed by F1 (JBRULES-3284). Thanks! Vincent: Yes, I think there is risk. Even if you don't use jobs explicitly, Drools uses the same event scheduling system for both internal events and application-defined events and jobs. The main problem is this: How do you establish correctness of your code and the overall system? Well, you make sure your unit tests and functional tests pass. As it stands, I cannot get my tests to pass with Drools 5.3.0, so I cannot put Drools 5.3.0 in production. No matter which version you use, only good test coverage will give you the assurance that your system is functioning properly. I encourage you to try out Drools 5.3.0 (in a test environment) and to report any issues you run into. It can only help make Drools better. 2011/11/9 Vincent LEGENDRE vincent.legen...@eurodecision.com Just wondering : does these problems happends because you use clocks and jobs, or is it general to fusion 5.3 ? Did not migrate my project on 5.3 for now. So do you think there is a risk, knowing that I only use very basic fusion features ? -- *De: *Edson Tirelli ed.tire...@gmail.com *À: *Rules Users List rules-users@lists.jboss.org *Envoyé: *Mercredi 9 Novembre 2011 14:53:00 *Objet: *Re: [rules-users] Bugs in Drools 5.3.0 break Fusion event processing Richard, This is great info. Yes, please open JIRA's for all 3 issues and we will make sure this is fixed for the next release. Thank you, Edson ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] How to dynamically invoke a field or property into a fact and set rule on that field or property
Hello I have a problem please any one help me i have a field product type depending on product type i want to create new field or property or fact, and on the new field i want to give rules... please send me some example or link to lean and practice if we dynamically invoke the fact or add a property will it shows a pattern which is declaring that the rule is looking for a that fact . In advance thanks if any one help ... thanks a lot .. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-dynamically-invoke-a-field-or-property-into-a-fact-and-set-rule-on-that-field-or-property-tp3495811p3495811.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] RulesRepository usage - jar incompatibility issue
Hi,
I am trying to use RulesRepository to create a package and copy required
assets (by using their uuid) into the created package.
Below is the code snippet and the corresponding stack trace of the run-time
exception being thrown.
I would like to know the appropriate lucene-core jar to be used to get rid
of the below exception.
I have tried lucene-core 2.3, 2.4, 2.9 and 3.4 till now, none solved this.
static Repository repository;
/**
* @param args
* @throws RepositoryException
* @throws LoginException
*/
public static void main(String[] args) throws LoginException,
RepositoryException {
repository=getRepositoryHandle();
Session session=repository.login();
RulesRepository rulesRepository=new RulesRepository(session);
PackageItem
packageItem=rulesRepository.createPackage(newPackage,
newPackageDescription);
String
hello=rulesRepository.copyAsset(f51858e0-b9b2-44c7-863c-44e5680bb1b3,
newPackage, newPackage);
System.out.println(packageItem);
System.out.println(hello);
}
private static Repository getRepositoryHandle(){
if (repository == null)
repository = new
TransientRepository(classpath:repository.xml,praveen/repository);
return repository;
}
Exception in thread main java.lang.NoClassDefFoundError:
org/apache/lucene/search/SortComparatorSource
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at
org.apache.jackrabbit.core.config.BeanConfig.newInstance(BeanConfig.java:177)
at
org.apache.jackrabbit.core.config.RepositoryConfigurationParser$1.getQueryHandler(RepositoryConfigurationParser.java:631)
at
org.apache.jackrabbit.core.config.RepositoryConfig.getQueryHandler(RepositoryConfig.java:1032)
at
org.apache.jackrabbit.core.SearchManager.init(SearchManager.java:174)
at
org.apache.jackrabbit.core.RepositoryImpl.getSystemSearchManager(RepositoryImpl.java:630)
at
org.apache.jackrabbit.core.RepositoryImpl.access$100(RepositoryImpl.java:124)
at
org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.getSearchManager(RepositoryImpl.java:1860)
at
org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.doPostInitialize(RepositoryImpl.java:2095)
at
org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.initialize(RepositoryImpl.java:2000)
at
org.apache.jackrabbit.core.RepositoryImpl.initStartupWorkspaces(RepositoryImpl.java:533)
at
org.apache.jackrabbit.core.RepositoryImpl.init(RepositoryImpl.java:342)
at
org.apache.jackrabbit.core.RepositoryImpl.create(RepositoryImpl.java:605)
at
org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:232)
at
org.apache.jackrabbit.core.TransientRepository.startRepository(TransientRepository.java:280)
at
org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:376)
at
org.apache.jackrabbit.commons.AbstractRepository.login(AbstractRepository.java:111)
at TestRepository.main(TestRepository.java:22)
Regards,
Praveen.
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Re: [rules-users] How to dynamically invoke a field or property into a fact and set rule on that field or property
Hi there, can you elaborate a little bit more on what are you trying to achieve. It's almost impossible to help with that generic description. You can write rules on your products that create and insert new facts pretty easily Rule categorize product no-loop when $p:Product(name == Product1) then $p.setCategory(category1); update($p); end This rule will enrich your original product with a category depending on the product name. Are you looking to something similar to this? Cheers On Thu, Nov 10, 2011 at 2:05 AM, srinivasasanda srinivasasa...@gmail.comwrote: Hello I have a problem please any one help me i have a field product type depending on product type i want to create new field or property or fact, and on the new field i want to give rules... please send me some example or link to lean and practice if we dynamically invoke the fact or add a property will it shows a pattern which is declaring that the rule is looking for a that fact . In advance thanks if any one help ... thanks a lot .. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-dynamically-invoke-a-field-or-property-into-a-fact-and-set-rule-on-that-field-or-property-tp3495811p3495811.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - CTO @ http://www.plugtree.com - MyJourney @ http://salaboy.wordpress.com - Co-Founder @ http://www.jugargentina.org - Co-Founder @ http://www.jbug.com.ar - Salatino Salaboy Mauricio - ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] A little suggestion about the 'ResourceFactory', 'DrlParser' API
Would you please provide a method in 'org.drools.io.ResourceFactory' like this: public static Resource newReaderResource(InputStream stream, String encoding); then I can use this method to load drl files as a stream while explicitly specify its ecoding? And in line: 287 of class 'org.drools.compiler.DrlParser': lexer = new DRLLexer( new ANTLRInputStream( is ) ); no encoding specified as well. The ANTLRInputStream has constructors which allows you to specify the encoding, otherwise it would figure out the encoding according to the environment, which is unpredictable some times. I'm using drools 5.3.0, the newest version. Thosse problems exists for quite a while during previous versions. I'm fainting to see they are almost there after upgraded to the new version. -- Regards. Miles. Wen ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to dynamically invoke a field or property into a fact and set rule on that field or property
My requirement is if i select the product type mobile, or dth, or some other , then i will check one more rule if customer credit total is above 1000 etc.. then i want create a new fact or field . and on that field i want to keep rule and give some discount constraint as new rule I am new to drools please help me i have some problem, After creating a pojo class jar, uploads into guvnor , and write rules on that, how can we add new fact at runtime dynamically , where does it comes in guvnor to write rule on new facts generated dynamically. plz can give some brush up on this. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-dynamically-invoke-a-field-or-property-into-a-fact-and-set-rule-on-that-field-or-property-tp3495811p3495891.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to dynamically invoke a field or property into a fact and set rule on that field or property
I suggest you to start simple. Just create a java project add the drools dependencies (knowledge-api, drools-core and drools-compiler), define your POJO classes that will represent your Domain model, for example: Product, Discount, Category, etc and then you can start writing your rules. When you get a set of rules ready you can use the drools APIs to create your knowledge session that will allow you to insert facts and evaluate them with your defined rules. You can check the documentation page for more information on how to do that or you can also check out the examples located here: https://github.com/Salaboy/Drools_jBPM5-Training-Examples/tree/master/drools5 That shows how to create simple maven java projects that contains a set of rules to evaluate very simple scenarios. Cheers On Thu, Nov 10, 2011 at 3:16 AM, srinivasasanda srinivasasa...@gmail.comwrote: My requirement is if i select the product type mobile, or dth, or some other , then i will check one more rule if customer credit total is above 1000 etc.. then i want create a new fact or field . and on that field i want to keep rule and give some discount constraint as new rule I am new to drools please help me i have some problem, After creating a pojo class jar, uploads into guvnor , and write rules on that, how can we add new fact at runtime dynamically , where does it comes in guvnor to write rule on new facts generated dynamically. plz can give some brush up on this. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-dynamically-invoke-a-field-or-property-into-a-fact-and-set-rule-on-that-field-or-property-tp3495811p3495891.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - CTO @ http://www.plugtree.com - MyJourney @ http://salaboy.wordpress.com - Co-Founder @ http://www.jugargentina.org - Co-Founder @ http://www.jbug.com.ar - Salatino Salaboy Mauricio - ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] rule does not fire at first event
After insertion of the event, fireAllRules() is called. In fact, there is in addition a default rule rule default dialect java when Command() from entry-point XXX then System.out.println(No reaction on Command +new Date()); end which fires with the same timestamp as the rule which creates the fact ActivityState -- View this message in context: http://drools.46999.n3.nabble.com/rule-does-not-fire-at-first-event-tp3494056p3495981.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] [Planner] CachedMoveFactory drive to Corrupted undo move
Op 09-11-11 23:31, npiedeloup schreef:
Hello,
I'm almost new to Drools Planner, and i run into some problems.
One of them, I really want to understand is that my Planner works well until
i try to use a CachedMoveFactory instead of my MoveFactory, then i've got
Corrupted undo move at step 2.
Assigment are my PlanningEntity, Day are facts
My MoveFactory is like this :
for (final Assigment assigment: mySolution.getAllAssigments()) {
for (final Day day : mySolution.getAllDays()) {
moveList.add(new PlanMove(assigment, day));
}
}
This is good if the number of assignments and days don't change during
planning.
And my doMove is like :
final FactHandle factHandle = workingMemory.getFactHandle(assigment);
assigment.setDay(toDay);
workingMemory.update(factHandle, assigment);
You're only updating the planning entity (assignment) which is a good thing,
as it allows delta score calculation to work efficiently.
Notice that, during planning, you aren't updating the day or any other
problem fact, which is a good thing.
The UndoMove is really simple (new PlanMove(assigment, fromDay)) , so I
pretty sure this part is correct.
I have add a false day(future=true) which mean not plannified yet and all
assigment start at this day.
I have a rule like :
rule notPlannified
when
$assigment: Assigment( day.future )
The day.future is unusual. It might be ok, but to exclude it from the
possible causes, could you:
Add a method boolean isDayFuture() on the class Assignment and then do
$assigment: Assigment( dayFuture == true )
then
insertLogical(new IntConstraintOccurrence(notPlannified,
ConstraintType.NEGATIVE_SOFT, 50, $assigment));
end
My logs show :
INFO Phase construction heuristic finished: step total (0), time spend
(255), best score (0hard/-18750soft).
DEBUG Step index (0), time spend (2175), score (0hard/-18700soft), new
best score (0hard/-18700soft), accepted move size (1000) for picked step
([A148@[UNAFFECT]] == [12/11]).
Someone can explain me what I miss ?
Thanks.
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Geoffrey De Smet
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