September 2002
Intermediate to advanced
608 pages
14h 20m
English
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Chapter 20. Message-Driven Beans
Message-driven beans are not a big leap from where we have been before. In Chapter 12, “The Java Message Service,” we introduced the JMS, and the idea of a message consumer that is activated by receipt of messages. Message-driven beans simply extend this capability to the EJB world, without changing very much else about the nature of the message consumer.
Where we will see a similarity to other EJB types is in the use of deployment descriptors, rather than embedded code, to configure aspects of our bean's behavior. With the earlier JMS examples, we coded directly into our classes the name of the Topic to which we wanted to connect. With the MDB, this will be configured as part of the deployment descriptor, giving ...
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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.