How can I create dynamic RuntimeEnvironment in web application?

[c00823ue]

My web application, using jbpm 6.0.0.Final, can run on wildfly-8.1.0.Final.

@Inject
@PerRequest
private RuntimeManager manager;

@Inject
TaskService taskService;

@Produces
    @Singleton
    @PerProcessInstance
    @PerRequest
    public RuntimeEnvironment produceEnvironment(EntityManagerFactory emf) {
    
                KieServices ks = KieServices.Factory.get();
                KieContainer kContainer = ks.getKieClasspathContainer();
       
                KieBase kbase = kContainer.getKieBase();
      
                AbstractAuditLogger auditlogger = null;
     
        RuntimeEnvironmentBuilder a  = RuntimeEnvironmentBuilder
                .getDefault()
                .persistence(true)
                .entityManagerFactory(emf)
                .userGroupCallback(usergroupCallback)
                .registerableItemsFactory(InjectableRegisterableItemsFactory.getFactory(beanManager, auditlogger));
               
        a.addAsset(ResourceFactory.newClassPathResource("rewards.bpmn"),ResourceType.BPMN2);
       
        
        RuntimeEnvironment environment = a.get();
       
      
        ((SimpleRegisterableItemsFactory) environment.getRegisterableItemsFactory()).addWorkItemHandler("xx", handler.TestWorkItemHandler1.class);
      
        return environment;
    }

Now I want to use Kiebase to create RuntimeEnvironment, so I did a little change at function produceEnvironment.

@Produces
    @Singleton
    @PerProcessInstance
    @PerRequest
    public RuntimeEnvironment produceEnvironment(EntityManagerFactory emf) {
    
        KieServices ks = KieServices.Factory.get();
        KieContainer kContainer = ks.getKieClasspathContainer();
        KieBase kbase = kContainer.getKieBase();
      
        AbstractAuditLogger auditlogger = null;
     
        RuntimeEnvironmentBuilder a  = RuntimeEnvironmentBuilder
                .getDefault()
                .persistence(true)
                .entityManagerFactory(emf)
                .userGroupCallback(usergroupCallback)
                .knowledgeBase(kbase)
                .registerableItemsFactory(InjectableRegisterableItemsFactory.getFactory(beanManager, auditlogger));
              
                
        RuntimeEnvironment environment = a.get();
       
      
        ((SimpleRegisterableItemsFactory) environment.getRegisterableItemsFactory()).addWorkItemHandler("xx", handler.TestWorkItemHandler1.class);
      
        return environment;
    }

I did put kmodule.xml under /META-INF.

<kmodule xmlns="http://jboss.org/kie/6.0.0/kmodule"></kmodule>

However, I got error

"{\"JBAS014671: Failed services\" => {\"jboss.deployment.unit.\\\"jbpm-demo-rewards-basic.war\\\".component.ProcessBean.START\" => \"org.jboss.msc.service.StartException in service jboss.deployment.unit.\\\"jbpm-demo-rewards-basic.war\\\".component.ProcessBean.START: java.lang.IllegalStateException: JBAS011048: Failed to construct component instance

    Caused by: java.lang.IllegalStateException: JBAS011048: Failed to construct component instance

    Caused by: javax.ejb.EJBException: java.lang.RuntimeException: Cannot find a default KieBase

    Caused by: java.lang.RuntimeException: Cannot find a default KieBase\"}}"

Moreover, Can kContainer auto scan new bpmn or drl file I add when this web application is already running?

Full server log attached. Thanks!