February 2007 - rules-users - Jboss List Archives

Need Help: Errors while running FibonacciExample

by venkatesh devalapura nagabhushana

Hi, After successfully compiling the example code FibnacciExample.java, I tried to run it, I get the following error, let me know how to solve it: java FibonacciExample Exception in thread "main" java.lang.ExceptionInInitializerError at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0) at org.drools.semantics.java.RuleBuilder.<clinit>() (Unknown Source) at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0) at org.drools.compiler.PackageBuilder.addRule(… [View More]

17 years, 9 months

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Recursive Running While Using assertLogical()

by Micheal John

17 years, 11 months

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DSL - Calling Java Method , Eval functions

by kingston

Is it possible to write a rule in DSL to check for a value that is returned by a calls to a java method in the Condition part ? Are there any sample codes for using eval in DSL Syntax or for calling java methods ? -- View this message in context: http://www.nabble.com/DSL---Calling-Java-Method-%2C-Eval-functions-tf3307... Sent from the drools - user mailing list archive at Nabble.com.

18 years, 1 month

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can we get the output from getters for two asserted objects using DSL method in drools rules

by vijay nooka

hi, i am setting two inputs through setters and asserting the corresponding objects in to working memory. after firing the rules the error message is setting in a setters method of Errorlist class,when i try to retrieve those err mssges through getters..i am getting only one error message and the other message is Null..i need to print two error messages for two asserted objects..can u plz help in this... Thanks vijay -- View this message in context: http://www.nabble.com/can-we-get-the-… [View More]

18 years, 1 month

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PropertyChangeListeners vs. modify()

by Dirk Bergstrom

Reading through the sources, it looks like property change listeners simply end up calling modify(). This implies that you're better off not using them if you'll be changing more than one property at a time, since you'll just be calling modify() a bunch of times. Better to change all the properties, then call modify() once. Is this a fair reading, or am I missing something? -- Dirk Bergstrom dirk(a)juniper.net _____________________________________________ Juniper Networks Inc.… [View More]

18 years, 1 month

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retracting a fact after all interested rules have fired??

by Justine Hlista

Need some instruction for retraction strategies. We have an application that receives messages about the status of various things in the system, and at the moment I am asserting these messages as facts. The rules are written against these messages. Various rules might be interested in various values in the message, and they all fire independently. The problem is that after all the existing rules that are interested in the message have fired, I want to retract the message. How do I ensure that … [View More]

18 years, 1 month

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Converting this DRL into a Decision Table

by Vargas, Michael E

Hi, I'm currently trying to convert this Rules into a Decision Table: rule "JobLevel" when p : Person( status == Person.NOTRUN, age == "27", person) then System.out.println(p.getJobLevel()); p.setJobLevel("You're a rookie"); p.setStatus(Person.RUN); modify(p); System.out.println(p.getJobLevel()); end The thing I can't seem to figure out is how to bind the p variable to … [View More]

18 years, 1 month

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Newbie: Is this feasible w/ Drools?

by Alexander Richter

Hello, I work in a bioinformatics group and we're interested in using Drools for setting up an assertion engine for biological processes. We have over 300 genomes ( == sets of facts), each with upwards of 10K genes/features with annotations ( == facts). We want to be able to predict whether various biological processes exist, based on presence of the annotated genes that are the components of the process. Asserted processes are not black and white; we may have various levels of … [View More]

18 years, 1 month

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RuleBaseImpl Error - Help needed

by kingston

Hi, I am a beginner. I am using DSL Syntax. I get errrors like org.drools.rule.InvalidRulePackage: unknown:7:48 mismatched token: [@16,48:49='&&',<55>,1:48]; expecting type ')' unknown:8:0 Unable to expand: ;. Due to Expression was not expandable: at org.drools.rule.Package.checkValidity(Unknown Source) at org.drools.reteoo.RuleBaseImpl.addPackage(Unknown Source) at student.DroolsStudent.main(DroolsStudent.java:50) Where can i get the API documentation for RuleBaseImpl … [View More]

18 years, 1 month

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Salience Problem

by Micheal John

18 years, 1 month

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rules-users February 2007