Define "without invoking a bean"? Where else would you put the logic for your initialization task?
It's possible to create a JMX Service object with @Depends on the ObjectName of your EAR, and it'll run through the "start" method after the EAR has deployed.
I was not clear enough :-)
I do not want that the init service is invoked atomatically just after server is started.
I will investigate that with a JMX service. It should be a solution ...