September 2002
Intermediate to advanced
608 pages
14h 20m
English
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20.1. Writing a Message-Driven Bean
When we introduced JMS in Chapter 12, we made a version of the Standings class the recipient of the messages. Because we've already reworked the Standings class as a session bean, I decided to focus on the Games class for the message-driven bean example. The net effect is identical: Games can be added to the game list by either object, but the Standings object is always just passing these updates through to the Games object anyway, so having the Games object receive updates directly is actually a small optimization.
Our GamesMessageBean includes both familiar and unfamiliar pieces. What is familiar is the implementation of the javax.jms.MessageListener interface, and the inclusion of an onMessage() call that ...
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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.
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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.