rules-users June 2014

rules-users@lists.jboss.org

69 participants
116 discussions

Drools-6 WB | Why Database is Required for Indexing When GIT repo is available

by Zahid Ahmed

Hi, In Drools-6 documentation its mentioned that, "Everything is now stored as a file, including meta data. The database is only there to provide fast indexing and search. So importing and exporting is all standard Git and external sites, like GitHub, can be used to exchange repositories." (Reference : drools-docs.pdf : 2.3. New and Noteworthy in KIE Workbench 6.0.0) I want to know that why its required to store indexes in database, when we already have a repository with us, indexes could have been saved in the GIT repository itself. If we need database then now we need a license for database also. After reading this I am looking for database configurations in the documentation but I am not able to find it in the documentation. Where to configure it ? In GIT ? or in Workbench ? Regards, Zahid

11 years, 7 months

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Abstraction between rules and data model?

by Péter Gergely, Horváth

Hi All, We are evaluating Drools 6 for our use case, and face challenges where we would need some ideas from more experienced users of Drools. We have an application with a massive code base and a large number of model (entity) classes. We are in the process of moving away from inherited legacy technologies and refactoring the old code base. As a part of this work we would like extract some of the hard-coded business logic to external rules, that is why we are looking at Drools as a potential solution. What we would like to have is some kind of abstraction or mapping between actual entities and rules the business users can define so that they do not have to know the _exact_ details of the data model (field names, precise relations etc). This would be important for us so that we can refactor the old model classes without affecting business rules; also it would make life easier for the business users. While IDE support might make refactoring easier, we definitely want to have a separation between rules and entities. Given our situation, writing and maintaining "stable" wrapper/adapter classes for the sole purpose of rule processing is out of question. I have checked the documentation of Drools DSL support and for me it seems to be overkill for our use case: we do not really need a custom language, but simply an abstraction between rules and the data model classes. What I could imagine is a piece of code, (a custom property resolver? - no sure how it is called) which maps property expressions to actual properties based on a custom annotation on the entity class or something like that, so that a rule containing "Foo.bars" expression does not have to change even if we decide to rename "Foo.bars" to "Foo.barList" in the model classes. (This was just a simple example of a potential use cases) Could you please share your thoughts on this topic and point me into the right direction? Thanks, Peter

11 years, 7 months

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How to refer values from different sheets in drools decision table?

by Shrinath Managuli

Hi Drools, Requires clarity on referring data in Drools Decision table, Consider a IN case as like below, [cid:image001.png@01CF7E9C.169B05D0] Here the values for IN case are "F" and "M" are mapped from different sheet using the reference CONCATENATE("""", 'user-gender-datasheet'!C15, """, """, 'user-gender-datasheet'!C16, """"). When the values for IN grows, then Excel sheet references would be not maintainable. Is there another approach available to map the values from different sheet in drools decision table? -Shrinath [Aspire Systems] This e-mail message and any attachments are for the sole use of the intended recipient(s) and may contain proprietary, confidential, trade secret or privileged information. Any unauthorized review, use, disclosure or distribution is prohibited and may be a violation of law. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.

11 years, 7 months

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Does generated graph rules is build to respect a disjunctive normal form ?

by Mercier Jonathan

Hi, We use Drools at this time to explore some possibilities. We have an old system, clips based and with clips rules need to be wrote to a disjunctive normal form because they are no internal processing to transform user rule to a disjunctive normal form. As Drools generate a graph (Phreak) i would like to know if this graph try to represent rules as a disjunctive normal form ? if not i would like to know if we should to use disjunctive normal form to write rules ? It seem disjunctive normal form could allow to do some concurrent computation, i would like to know if drools will use this feature? thanks Regards

11 years, 7 months

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"Cannot find KieModule" with kieServices.newKieContainer() with LATEST or RELEASE instead of explicit version number (eg: 0.0.1)

by Matteo Mortari

Hello, in the hope this could save time if someone has been experiencing same issue. Drools 6.0.1.Final I had message "Cannot find KieModule" with kieServices.newKieContainer() with LATEST or RELEASE , instead of explicit version number (eg: 0.0.1) on a application where the KIE module Rule artifact project kjar has been locally-installed from remote Maven repository, that is the right hand side of this diagram: http://docs.jboss.org/drools/release/6.0.1.Final/drools-docs/html_single/... Meaning that before launching Application, I performed mvn org.apache.maven.plugins:maven-dependency-plugin:2.8:get -Dartifact=com.acme:X:LATEST -DrepoUrl= http://nexus-hostname/nexus/content/repositories/releases/ Then: kieServices.newKieContainer() with LATEST, kieServices.newKieContainer() with RELEASE, failed with stack trace: Exception in thread "main" java.lang.RuntimeException: Cannot find KieModule: com.acme:X:RELEASE at org.drools.compiler.kie.builder.impl.KieServicesImpl.newKieContainer(KieServicesImpl.java:86) at (...) But kieServices.newKieContainer() with a fixed version, eg.: 0.0.2 did indeed worked OK, if installed in the local .m2 repository. To avoid this issue, I found only 3 possible workarounds 1 use mvn maven-dependency-plugin:go-offline but did not work all of the time 2 manually ensure maven-metadata-local.xml file is generate in local .m2 repository 3 just download manually .jar and .pom of the remote maven repo, and then install with mvn install:install-file In this case, of workaround kieServices.newKieContainer() works OK with all the version LATEST, RELEASE, and fixed version number. Raise jira DROOLS-419 with more details and example projects, please don't hate me if was just me missing something or not-Drools issue actually =P In my defense I had good intentions saving somebody's else time in case same strange behavior, which is really strange because to me it worked only with explicit fixed version number, and that was really bizarre ;) Hope this helps, Ciao MM

11 years, 7 months

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Re: [rules-users] Question about Fusion pseudoclock

by Wolfgang Laun

This is code that can be used to manipulate the pseudo-clock which is just a pretty face without any works: SessionPseudoClock clock; private void advance( Date eventDate ){ long currentTime = clock.getCurrentTime(); long eventTime = eventDate.getTime(); clock.advanceTime( eventTime - currentTime, TimeUnit.MILLISECONDS ); } Of course, you can use other ways to determine a number of milliseconds for moving the hands of the pseudo-clock. If you use the number of peas in a pot, it'll work just as well, although the data might be closer to 1970. -W On 31/05/2014, Natalia Iglesias de Amunategui <natalia.iglesias(a)casadearriba.net> wrote: > Hello, > > > > I am implementing temporal rules using drools fusión 6.0.1 and the new KIE > services api. I insert facts into the kie session that include some DATE > fields which I later use in the rules. I also insert events using the > pseudoclock, so I guess that means that the timestamp is kept in long > format. > > The consequence is that my temporal rules do not fire at all! I have no > @timestamp annotation in the declare of the event, so Drools internal clock > should be used as timestamp. > > > > I have displayed the value of the pseudoclock getCurrentTime method, and > the output shows a date of 1970: > > > > > > > > I need to understand why the clock.getTime returns dates of 1970, maybe > when > this is solved the rules will fire with the internal event timestamp. > > > > (After that I have tried every possible combination: creating a date or > long > field in the event fact representing the timestamp, converting long to date > and viceversa, but nothing seems to work..). > > > > I enclose here the initialization that I do of the kieContainer and > session: > > > > > > public static void main(final String[] args) { > > try { > > > > // load up the knowledge base > > KieServices ks = KieServices.Factory.get(); > > KieContainer kContainer = > ks.getKieClasspathContainer(); > > > System.out.println(kContainer.verify().getMessages().toString()); > > > > > > // set stream mode as opposite to cloud mode > > KieBaseConfiguration kbconf = > KieServices.Factory.get().newKieBaseConfiguration(); > > kbconf.setOption(EventProcessingOption.STREAM ); > > > > // set clock to pseudo clock to be able to advance it > manually > > KieSessionConfiguration ksconf = > KieServices.Factory.get().newKieSessionConfiguration(); > > ksconf.setOption(ClockTypeOption.get("pseudo")); > > > > > > // returns ksession from kiecontainer as defined in the > kmodule.xml file > > KieSession kSession = > kContainer.newKieSession("VAPSession", ksconf); > > > > > > // Insert test patients and related classes, dates are > in long format to match pseudoclock > > final Patient p1 = new Patient( "MrJones", 45, 1, > true,false,false,35.0, > > 5000,"None","Localized > Infiltrates","Yes","None","S.Aureus",245,false, false, 0, > > true,new > SimpleDateFormat("yyyy-MM-dd").parse("2014-05-31").getTime(),"", > > new > SimpleDateFormat("yyyy-MM-dd").parse("2014-05-31").getTime(),false,false,fal > se,false); > > kSession.insert( p1 ); > > > > > > // Insert test patients and related classes, dates are > long format > > > > final Patient p2 = new Patient( "MissDaisy", 90, 1, > true,false,true,37.0, > > 5000,"Purulent","Diffuse or Patchy > Infiltrates","None","Heavy","S.Aureus",235,false, false, 0, > > true,new > SimpleDateFormat("yyyy-MM-dd").parse("2014-05-31").getTime(),"", > > new > SimpleDateFormat("yyyy-MM-dd").parse("2014-05-31").getTime(),false,false,tru > e,false); > > > > kSession.insert( p2 ); > > > > // define and get a reference to the entry point > > EntryPoint nursingStream = kSession.getEntryPoint( > "NursingStream" ); > > > > // define session clock > > SessionPseudoClock clock = kSession.getSessionClock(); > > > > // insert events > > // then, while inserting events, advance the clock as > necessary: > > > > clock.advanceTime(24, TimeUnit.HOURS); > > CPIScore cpiScore1 = new CPIScore( > p1,"diagnosis",7,ToDate(clock.getCurrentTime()) ); > > nursingStream.insert( cpiScore1 ); > > System.out.println(cpiScore1.getcpiScoreDate()); > > > > // day 2 > > clock.advanceTime( 24, TimeUnit.HOURS ); > > cpiScore1 = new CPIScore( > p1,"follow-up",5,ToDate(clock.getCurrentTime()) ); > > nursingStream.insert( cpiScore1 ); > > System.out.println(cpiScore1.getcpiScoreDate()); > > > > // day 3 > > clock.advanceTime( 24, TimeUnit.HOURS ); > > cpiScore1 = new CPIScore( > p1,"follow-up",5,ToDate(clock.getCurrentTime()) ); > > nursingStream.insert( cpiScore1 ); > > System.out.println(cpiScore1.getcpiScoreDate()); > > > > > > The fact classes have now long fields to represent Dates (I changed to see > if that made a difference, it didn't). The event class has such a long > field > that can be defined as @timestamp but I rather prefer to use the internal > event timestamp managed by Drools. > > So in my .DRL file I'd like to have: > > > > declare CPIScore > > @role(event) > > end > > > > In my rules I compare the patient hospitalization date (defined as Date and > later as Long in the fact class) with a stream of events , and I expect > drools to extract the correct timestamp from the event. This can't happen > if > 1970 is the pseudoclock date. > > > > Please advice as about how to proceed, I'm a bit lost at this point. > > > > Thanks in advance > > Natalia > > > > > > --- > Este mensaje no contiene virus ni malware porque la protección de avast! > Antivirus está activa. > http://www.avast.com >

11 years, 7 months

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rules-users June 2014