The application I'm working on will use facts which are dynamically generated classes. After reading http://jira.jboss.com/jira/browse/JBRULES-557 I figured out the trick to get this working was to pass the ClassLoader responsible for the dynamic classes to drools. So I set things up something like: PackageBuilderConfiguration pbc = new PackageBuilderConfiguration(); pbc.setCompiler(PackageBuilderConfiguration.JANINO); pbc.setClassLoader(instanceOfDynamicallyGeneratedClass.getClass().getCla ssLoader()); PackageBuilder builder = new PackageBuilder(pbc); Using this approach I am able to execute rules which interact with the properties of the dynamically generated classes. The problem I've run into is that I'd really like to work with the JSR-94 API. I have two questions: 1. Is the code I referenced above using the correct approach? Or am I already headed down the wrong path? 2. Would passing additional configuration details into the properties argument of the call ruleExecutionSetProvider.createRuleExecutionSet(drlStream, properties) be advisable? I have created a proof of concept to test this and included a patch. Using this approach the application code looks something like this: PackageBuilderConfiguration pbc = new PackageBuilderConfiguration(); pbc.setCompiler(PackageBuilderConfiguration.JANINO); pbc.setClassLoader(instanceOfDynamicallyGeneratedClass.getClass().getCla ssLoader()); Map localProperties = new HashMap(); localProperties.put("packageBuilderConfiguration", pbc); RuleExecutionSet ruleExecutionSet = ruleExecutionSetProvider.createRuleExecutionSet(drlStream, localProperties); Obviously this introduces a JBossRules dependency into my application code, but I am otherwise able to stick to the JSR-94 APIs. I have attached a patch to support this new property and welcome comments on this solution. Thanks, Marty Schoch <mschoch(a)reisys.com&gt; ------------------------------------------------------------------------ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users