Re: [rules-users] Class loader problem

swapnil thanx for the reply, this is my modified code try{ System.out.println("Initializing Fact...."); URL[] urls = new URL[]{ new URL("file://"+path) }; ClassLoader loader = new URLClassLoader(urls); Class clazz = loader.loadClass("test.Message"); //Class.forName("test.Message", false, ucl); Object factObj = clazz.newInstance(); String ruleFile = "test/Sample.drl"; Method method = clazz.getMethod("setMessage", new Class[]{String.class}); Method method1 = clazz.getMethod("getMessage"); //System.out.println("facts loaded\n"); method.invoke(factObj, new Object[]{"Hello"}); System.out.println("initializing packageBuilder"); PackageBuilderConfiguration config = new PackageBuilderConfiguration(); config.setClassLoader(loader); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(config); System.out.println("finding Rule"); kbuilder.add(ResourceFactory.newClassPathResource("test/Sample.drl"),ResourceType.DRL); if (kbuilder.hasErrors()) throw new RuntimeException("Unable to compile rules. " + kbuilder.getErrors().toString()); KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(new RuleBaseConfiguration(loader)); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); StatelessKnowledgeSession session = kbase.newStatelessKnowledgeSession(); System.out.println("running rule....... \n"); session.execute(factObj); System.out.println("\nend...\n"); System.out.println(method1.invoke(factObj).toString()); } catch (Throwable t) { t.printStackTrace(); } ------------------------------------------------------------ Added the following JARS in WEB-INF\lib antlr-runtime-3.1.1.jar core-3.4.2.v_883_R34x.jar drools-api-5.0.1.jar drools-core-5.0.1.jar drools-decisiontables-5.0.1.jar mvel2-2.0.10.jar drools-compiler-5.0.1.jar xstream-1.3.1.jar thanx and regards Hemanth -- View this message in context: http://old.nabble.com/Class-loader-problem-tp26160051p26191859.html Sent from the drools - user mailing list archive at Nabble.com.