Re: [rules-users] Class loader problem

[Hemanth kumar]

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
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