April 2002
Beginner to intermediate
1128 pages
26h 33m
English
book
Sams Teach Yourself J2EE™ in 21 Days
by Martin Bond, Dan Haywood, Debbie Law, Andy Longshaw, Peter Roxburgh
Content preview from Sams Teach Yourself J2EE™ in 21 Days
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Q&A
| Q1: | What are the major differences between Message-driven beans and Entity or Session beans? |
| A1: | Message-driven beans have no client interface; they have no Home, Local, or Remote interfaces—their methods cannot be called directly. Message-driven beans exist only to consume JMS messages and are controlled by the container. They are anonymous and are called asynchronously. They do not have a passive state. They have no client security context. |
| Q2: | What are the two interfaces a Message-driven bean must implement? |
| A2: | The javax.ejb.MessageDrivenBean interface and the javax.jms.MessageListener interface. |
| Q3: | What is the Method Ready Pool? |
| A3: | The Method Ready Pool is the collection of Message-driven bean instances that are available in the container ... |
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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.
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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.