I have a list of `EJB`s, each one may run for more than 1 minute. I would like to run them in loop asynchronously, and then after a timeout of 10 seconds check for results using `Future` output. As I understand, both `ExecutorService` and `@Asynchronous` annotation on method can give me this functionality. When should I use `Asynchronous` annotations, and when it's better to use `ExecutorService`? thank you