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.
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