January 2009 - rules-users - Jboss List Archives

by Brad Hadfield

Hi, I am unable to build packages using guvnor - Caused by: java.lang.NullPointerException at org.drools.compiler.PackageBuilder.validateUniqueRuleNames(PackageBuilder.java:826) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:548) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:287) Is there another method for creating deployable packages for loading by the RuleAgent? I'm using a Properties file stipulated directory (until Guvnor becomes a little more stable). Thanks

16 years, 11 months

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Where the declare bugs on guvnor

by Héron Nicolas

Hello, There is a project called guvnor on the JIRA site. Where should we report guvnor issues : in the JRules or in the guvnor project ?

16 years, 11 months

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Reasoning over hierarchies.

by Faron Dutton

I know this has probably been asked before but I cannot find any mention of it. How does one reason over a transitive (recursive) relation in Drools? ----------------------------------------------------------- The classic example from Prolog: -- The relation parent(P,C) says that P is a parent of C. parent(P,C). -- The predicate ancestor(A,B) implies that A is an ancestor -- of B if A is a parent of B or A is a parent of C and C -- is an ancestor of B. ancestor(A,B) :- parent(A,B). ancestor(A,B) :- parent(A,C), ancestor(C,B). -- The query ancestor(bob,frank) asks if bob is an ancestor -- of frank. ?- ancestor(bob,frank). ----------------------------------------------------------- In Drools, I can find the parent using query isParent(String a, String b) p: Person(name = a) c: Person(name = b, parent = p) end likewise, I can find the grandparent using query isGrandparent(String a, String b) g: Person(name = a) p: Person(parent = g) c: Person(name = b, parent = p) end I am unable to formulate the query isAncestor.

16 years, 11 months

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using a dsl in multiple drl files

by Thierry B

Hello, I try to use a dsl in several DRL rule files, but it doesn't work. In my java class, I do that : Reader source1 = new InputStreamReader( DroolsTest.class.getResourceAsStream( "/Test1.drl" ) ); Reader source2 = new InputStreamReader( DroolsTest.class.getResourceAsStream( "/Test2.drl" ) ); //optionally read in the DSL (if you are using it). Reader dsl = new InputStreamReader( DroolsTest.class.getResourceAsStream( "/Exemple.dsl" ) ); builder.addPackageFromDrl( source1, dsl ); builder.addPackageFromDrl( source2, dsl ); Is it possible to use a same dsl file in several drl files or I have to have one dsl for one drl ? Thanks :-) -- View this message in context: http://www.nabble.com/using-a-dsl-in-multiple-drl-files-tp21584358p215843... Sent from the drools - user mailing list archive at Nabble.com.

16 years, 11 months

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Run a set of rules in a group B from a rule in a group A

by Thierry B

Hello, Is it possible to run a rule from a group A, and if conditions of that rule are satisfied that in consequence to tell Drools to run rules of a group B ? And if it's possible, how to do that? Thanks :-) -- View this message in context: http://www.nabble.com/Run-a-set-of-rules-in-a-group-B-from-a-rule-in-a-gr... Sent from the drools - user mailing list archive at Nabble.com.

16 years, 11 months

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how to get CashMemoDtl in my dsrl file.

by manyasri.m

Hi, how to get CashMemoDtl in my dsrl file.once i am calling executeFormRules than rules should be fired. In this case i am getting CashMemoHdr details it's working fine. problem is how to get CashMemoDtl in my rule file. CashMemoHdr hdr = new CashMemoHdr(); hdr.setBillNo(123l); Set<CashMemoDtl> cashMemoDtls = new HashSet<CashMemoDtl>(); CashMemoDtl dtl = new CashMemoDtl(); dtl.setQuantity(11l); cashMemoDtls.add(dtl); hdr.setCashMemoDtls(cashMemoDtls); service.executeFormRules(hdr); give me proper suggestion.ASAP. Thanks, -Manya -- View this message in context: http://www.nabble.com/how-to-get-CashMemoDtl-in-my-dsrl-file.-tp21583114p... Sent from the drools - user mailing list archive at Nabble.com.

16 years, 11 months

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how to get CashMemoDtl in my dsrl file.

by manyasri.m

Hi, how to get CashMemoDtl in my dsrl file.once i am calling executeFormRules than rules should be fired. In this case i am getting CashMemoHdr details it's working fine. problem is how to get CashMemoDtl in my rule file. CashMemoHdr hdr = new CashMemoHdr(); hdr.setBillNo(123l); Set<CashMemoDtl> cashMemoDtls = new HashSet<CashMemoDtl>(); CashMemoDtl dtl = new CashMemoDtl(); dtl.setQuantity(11l); cashMemoDtls.add(dtl); hdr.setCashMemoDtls(cashMemoDtls); service.executeFormRules(hdr); give me proper suggestion.ASAP. Thanks, -Manya -- View this message in context: http://www.nabble.com/how-to-get-CashMemoDtl-in-my-dsrl-file.-tp21583068p... Sent from the drools - user mailing list archive at Nabble.com.

16 years, 11 months

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How to Define Rule on Nested class properties using Drools BRMS 5

by Ashish Soni

Hi , How can i define a rule on a class property which is inside another class using guided editor in Guvnor ( BRMS ) . Thanks, Ashish -- View this message in context: http://www.nabble.com/How-to-Define-Rule-on-Nested-class-properties-using... Sent from the drools - user mailing list archive at Nabble.com.

16 years, 11 months

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KnowledgeBuilderConfiguration

by Steven Williams

Hi guys, It's no biggy but I was wondering whether KnowledgeBuilderConfiguration will get an addAccumulateFunction method, similar to PackageBuilderConfiguration? In our project we use Spring to configure Drools, which means we have a Map<String, Class> available for accumulate functions, so we could previously do: config.addAccumulateFunction(entry.getKey(), entry.getValue()); Now with KnowledgeBuilderConfiguration we had to change the Map to Map<String, String> and do the following: config.setProperty("drools.accumulate.function." + entry.getKey(), entry.getValue()); which seems like a retrograde step. -- Steven Williams Supervising Consultant Object Consulting Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501 steven.williams(a)objectconsulting.com.au www.objectconsulting.com.au consulting | development | training | support our experience makes the difference

16 years, 11 months

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or condition - subrules

by kfs2＠chryslerfinancial.com

I understand that as this rule is written below it will be compiled into 2 subrules which both fire. I searched the archives and found a post where Mark Proctor suggested "Bind each pattern, and do the || field constraints in an eval.". I'm new to Drools, can someone elaborate on how I would do that with the rule below? rule "Test" when (CoApplicant( relationship == "S" ) or (Contract ( state in ("CO", "IL")))) then ... Thanks Kent

16 years, 11 months

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rules-users January 2009