December 2002
Intermediate to advanced
1050 pages
24h 49m
English
Content preview from J2EE™ and Beyond: Design, Develop, and Deploy World-Class Java™ SoftwareBecome 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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Message-Driven Beans
MDBs are a new addition to J2EE. As mentioned previously, these beans provide a mechanism for providing a messaging server within the application server using EJB components. Prior to the inclusion of MDBs in the J2EE specification, application server vendors provided their own messaging services. While having a messaging service available was useful, what was really needed was a facility to perform messaging processing in the context of the EJB container. MDBs provide that capability using the JMS package interface.
The following code provides an example of a minimal implementation of an MDB. The client application creates a message, locates the message queue, and then sends the message. The server component, the MDB, is ...
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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.