April 2003
Intermediate to advanced
750 pages
16h 53m
English
book
EJB 2.0 Development with WebSphere Studio Application Developer
by Ueli Wahli, Wouter Denayer, Lars Schunk, Deborah Shaddon, Martin Weiss
Content preview from EJB 2.0 Development with WebSphere Studio Application Developer
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Developing a stateful session bean
In this section, we develop the stateful Reports session bean. This example may not be very real as a stateful session bean, but it illustrates some of the concepts.
Design issues
For a stateful session bean, you have to decide what data should be persistent, that is, the data items that are carried from one interaction to the next. These data items have to be serializable so that they can be saved in case the session bean is passivated between invocations of methods. For passivation and activation, see “Activation and passivation” on page 186.
Note that home and EJB references are not serializable, so we cannot keep home references over passivation/activation.
Persistent state
We will keep these data items ...
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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.