December 2011 - rules-users - Jboss List Archives

Error using drools.net for web application

by rulesengine.eval

I have seen a few posts on this, but nothing that seems to solve it. I have used drools.net working successfully locally in a windows app with the following code: PackageBuilder builder = new PackageBuilder(); Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("MinimalDroolsForm.SimpleRules.drl"); builder.AddPackageFromDrl("MinimalDroolsForm.SimpleRules.drl", stream); Package pkg = builder.GetPackage(); ruleBase = RuleBaseFactory.NewRuleBase(); ruleBase.AddPackage(pkg); workingMemory = ruleBase.NewWorkingMemory(); workingObj = new CustomerRecord(); etc. However, when I try something similar in a web app, I get the following error at builder.AddPackageFromDrl("DroolsApp.SimpleRules.drl", stream); : "The invoked member is not supported in a dynamic assembly" I am using all of the following assemblies: 1) drools-3.0 2) drools-dep 3) drools.dotnet 4) IKVM.GNU.Classpath 5) IKVM.Runtime Additionally, My rule is very simple: package DroolsApp rule "OldCustomer" when cust : CustomerRecord( DaysSinceLastOrder > 90, Status != "Re-Active" ) then true; end I am targeting the .NET Framework 4, and running on Windows7, under IIS7. Please let me know if you need any additional information. Thank you. -- View this message in context: http://drools.46999.n3.nabble.com/Error-using-drools-net-for-web-applicat... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years

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5.3.0.Final throws RuntimeDroolsException: Unable to merge resource attribute for type declaration

by Green, John M (HP Software)

I'm not very experienced with Drools but have some Java code that dynamically loads/unloads rules from a KnowledgeBase. It worked with 5.2 but now throws the following exception with 5.3 org.drools.RuntimeDroolsException: Unable to merge resource attribute for type declaration of class: 'NormalizedEvent' at org.drools.common.AbstractRuleBase.mergeLeft(AbstractRuleBase.java:642) at org.drools.common.AbstractRuleBase.mergeTypeDeclarations(AbstractRuleBase.java:608) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:537) at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:458) at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150) at com.hp.mon.processor.KnowledgeSessionFactory.addRules(KnowledgeSessionFactory.java:181) at com.hp.mon.processor.RuleRunner.runRules(RuleRunner.java:54) at com.hp.mon.processor.RulesTest.test(RulesTest.java:57) at com.hp.mon.processor.RulesTest.testSiteScopeSNMPRules(RulesTest.java:85) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) I have three .drl files. The first is "globals.drl" that simply imports and defines some global variables (e.g, a org.slf4j.Logger, etc.). This globals.drl file also defines NormalizedEvent as follows: declare NormalizedEvent @role( event ) end The second rules file (defaultRules.drl) contains default rules for aging out old / stale events. The third rules file has rules additional rules that are specific to a policy being dynamically deployed to our application. The compilation and loading process treats "globals.drl" as common "header" file. That is, rules files are pre-pended with globals.drl before they are compiled. For example: String globals = readDrlfile("globals.drl"); String newRules = readDrlfile("rulesToAdd.drl"); knowledgeBuilder.add(ResourceFactory.newReaderResource(new StringReader(globals + newRules))); if (knowledgeBuilder.hasErrors()) { throw exception ... } // No exception so compile succeeded --- BTW, it's using JANINO knowledgeBase.addKnowledgePackages(knowledgeBuilder.getKnowledgePackages()); // ERROR The first compile and load (globals.drl + defaultRules.drl) succeeds but I get this exception when I try to compile and load an additional file (globals.drl + additionalRules.drl). This code was also written by someone not very familar with Drools but it was working in 5.2 and now I need to get it working with 5.3 Looks like there were some significant code changes to AbstractRuleBase between these two releases. Any thoughts or suggestion here would be greatly appreciated.

13 years

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Problems with Domain Specific Language in eclipse

by Ronald Albury

I am just trying to learn DSL and have immediately run into issues. I have a simple DSL in the file named XEasyApp.dsl : *[condition][]{value} is an invalid Boolean={value} not in("T","t","1","F","f","0")* and then a simple DSLR in the file named Test.dslr: * package com.onfs.easyapp.rules import com.onfs.easyapp.EasyApp expander XEasyApp.dsl rule "EasyApp Insured is Citizen Validation" when $ea : EasyApp(priIns_eaInsuredIsCitizenInd is an invalid Boolean) then $ea.addError(drools.getRule().getName()); end* I get the expected expansion in the DRL Viewer: package com.onfs.easyapp.rules import com.onfs.easyapp.EasyApp rule "EasyApp Insured is Citizen Validation" when $ea : EasyApp(priIns_eaInsuredIsCitizenInd not in("T","t","1","F","f","0")) then $ea.addError(drools.getRule().getName()); end There are no Red X's when I view Test.dslr in the editor, however a problem shows up in the Problems area below: *Description Resource Path Location Type [13] Unable to expand: $ea.addError(drools.getRule().getName()); Test.dslr /TermXpressRules/src/main/rules Unknown Drools Error*

13 years

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Many to many matching rules implementation in Drools

by Milanello1998

Folks, I am recently working on a BI project which is doing reconciliation between repository and accounting. I'm using Drools 5.1.1 to maintain all these matching rules. One scenario i have no clue to implement in Drools is that I need to find x transactions from repository, to match y transactions from accounting, while existing repository transactions and accounting transactions are bigger than x and y. Does anybody have experience to do similar thing in Drools? Best Abe -- View this message in context: http://drools.46999.n3.nabble.com/Many-to-many-matching-rules-implementat... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years

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Listing all packages present in gunvor repository

by srinivasasanda

Hi, *Listing Packages* KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages(kbuilder1.getKnowledgePackages()); kbase.addKnowledgePackages(kbuilder2.getKnowledgePackages()); int flag=1; for(KnowledgePackage kp :kbase.getKnowledgePackages()) { System.out.println("Package Names are"+kp.getName()); } The code which i had written here can possible to retrieves the list of packages.Here,I added snapshots to kbuilder1,kbuilder2 and through kbase iam retrieving the packages list.Is it is possible to retrieve list of packages without adding package snapshots to kbuilder.???It means i think through repository.xml...How can i achieve that??? Even i referred REST API but unable to retrieve XML nodes from it -- View this message in context: http://drools.46999.n3.nabble.com/Listing-all-packages-present-in-gunvor-... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years

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How Add all packages to KnowledgeBuilder.add(drl or pkg or xsd,..);

by srinivasasanda

Hi All, Thanks in Advance to one and all, U have helped me lot , Please can give me some idea to resolve from this senario.. we are giving (package created in guvnor) as newUrlResource(url,type) to add to kbuilder, ... I have some 100 of packages how can i add all the packages to kbuilder... but by using rest api - http://localhost:8080/guvnor-5.2.0.Final-jboss-as-5.1/rest/packages (if i give this url in browser) i am able to see all the packages.. can i add the all packages with out hot coding the each and every package to kbuilder.add(url,type); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); String url="http://localhost:8080/guvnor-5.2.0.Final-jboss-as-5.1/org.drools.guvnor.G..."; kbuilder.add(ResourceFactory.newUrlResource(url), ResourceType.PKG); -- View this message in context: http://drools.46999.n3.nabble.com/How-Add-all-packages-to-KnowledgeBuilde... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years

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Fact Names in a Model

by srinivasasanda

How to get fact names present in a declarative model of a package.Could you please suggest me the classes available. -- View this message in context: http://drools.46999.n3.nabble.com/Fact-Names-in-a-Model-tp3572234p3572234... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years

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Opportunistic Backward Chaining

by Maciej Gowin

I saw that there is an open issue for Opportunistic Backward Chaining: https://issues.jboss.org/browse/JBRULES-3272 While I want to start working on this topic during my PhD thesis my question is if there is any work done on this? Is there any possibility to contribute in solving this issue? Of course I know that there is already Prolog Style Query Based Backward Chaining implemented.

13 years

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Unclosed string results in NullPointerException

by ronalbury

JBoss Developer Studio The following line in a DRL results in a NullPointerException of unknown location EasyApp(eaPremiumMode not in ("A", "S", "Q", "ABC", "SS)) Note that the last string on the line is not closed. The eclipse plug-in didn't show the problem clearly (by turning subsequent lines green) - it took a long time to track down (commenting out rules until the error went away). Should I submit a bug on this? -- View this message in context: http://drools.46999.n3.nabble.com/Unclosed-string-results-in-NullPointerE... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years

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Can I put java code in dslr file?

by Zhao Yi

I want to convert my drl to dsl and dslr. I found that if I choose using dsl, I couldn't write java code in rules any more. I must translate everything in dsl file. Can I combine dsl and drl in dslr file, like below rule. when I am using dsl, I will get an error: "[10] Unable to expand: System.out.println("add caculation start");" rule "add caculation" agenda-group "add" no-loop true dialect "java" lock-on-active when $m: Whether exist event then System.out.println("add caculation start"); System.out.println("add caculation end"); end -- View this message in context: http://drools.46999.n3.nabble.com/Can-I-put-java-code-in-dslr-file-tp3578... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years

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rules-users December 2011