public class Executer implements Runnable{

  @Override
  public void run(){
    // Here will be the backend-method invocation for firing CDI-Events

    // CDI-Dummy-Event - Does not fire properly. receiveStatusEvent() does not invoke
    BeanManager beanManager = CDI.current().getBeanManager();
    beanManager.fireEvent(new ResultEvent("Result event example"));
  }

}

public class EventReceiver implements LoggingProvider{

  public EventReceiver(){

  }

  public void receiveStatusEvent(@Observes ResultEvent event) {
     this.info("Event received: " + event.toString());
  }

}

public void executeAsynchBackendMethod(){

  // CDI-Dummy-Event works - receiveStatusEvent() invokes correctly
  BeanManager beanManager = CDI.current().getBeanManager();
  beanManager.fireEvent(new ResultEvent("Result event example"));

  /* The following alternative starts a thread, but the events, which are fired in the run() method, do not take any action in the receiveStatusEvent() method */

  // Getting managedExecuterService
  this.managedExecuterService = (ManagedExecutorService) new InitialContext().lookup("java:comp/DefaultManagedExecutorService");

  // Getting Instance of executer-Runnable (for injecting the backend-service afterwards)
  Instance<Executer> executerInstance = CDI.current().select(Executer.class);
  Executer executer = workflowExecuterInstance.get();

  // Start thread
  this.managedExecuterService.submit(executer);
}