June 2012
Intermediate to advanced
386 pages
10h 7m
English
Content preview from Web Technology: Theory and PracticeBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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7.5 EJB COMPONENTS
Just as Servlets run in a Servlet Container, EJBs run in an EJB container. The container itself could be either standalone or a part of an (Java EE) Application server. There are three types of EJBs—Session Beans, Entity Beans and Message driven Beans. A Bean, in general EJB parlance, is a component, but different from Java Beans. They are classified into these categories as per their specific functionalities they intend to achieve. Session Beans and Message driven Beans drive business logic (in slightly different ways) and Entity Beans manage persistence. Persistence can be achieved in different ways, but Java uses JPA (Java Persistence API) to deal with persistence, through the EntityManager interface. Most EJB containers ...
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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.