仅在ejb中启动特定的bean

Question

This is Java EE 6, I need some key beans from the EJB dependency, which is huge. It has a lot of @Startup beans, a lot of @Schedule annotations in there which I don't need to be started in my ear. How it could be achieved?

Answer 1

All the session beans / CDI beans in JavaEE are lazily initialized by default. Hence unless a bean is accessed, it won't be started. @Startup annotation is for @Singleton session beans to initialize them eagerly.

During startup, the container scans for all the @Schedule annotations, as such all the timers are created at startup. But the beans which contain the @Schedule method is only initialized the first time the timer is fired.