June 2013
Beginner
608 pages
17h 57m
English
Content preview from Beginning Java EE 7
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CHAPTER 8
Callbacks, Timer Service, and Authorization
In the previous chapter, you learned that session beans are container-managed components. They live in an EJB container, which wraps business code behind the scenes with several services (dependency injection, transaction management, etc.). Three of these services are life-cycle management, scheduling, and authorization.
Life cycle means that a session bean goes through a predefined set of state transitions. Depending on the type of your bean (stateless, stateful, singleton), the life cycle will consist of different states. Each time the container changes the life-cycle state, it can invoke ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.