Gerbil on a treadmill

Several years ago, we tried using EJB 1.0 and were utterly underwhelmed. Despite using what was for its time a high powered computer, our clock cycles and memory seemed to get eaten up somewhere in the container. Searching the web revealed that many others had similar complaints.

Sun heavily improved the EJB standard in version 2. The Container Managed Persistence was totally rewritten, and Message Driven Beans were introduced because many users wanted loosely coupled asynchronous applications. Things are much better now, and Sun released this book as part of its official documentation set for EJB 2. As usual, it is clearly written and authoritative.

So the good news is, if you are running EJB 1, you really should jump, and EJB 2 is the logical and easiest destination to get to. If so, you might as well get this book to smooth the transition.

But there is an alternative which this book completely neglects to mention. In the last 3 years, a rival to EJB has arisen. The open source jBoss. In 2000, I heard its founder, Marc Fleury, claim advantages over EJB 1. Since then, in various newsgroups, it does seem that jBoss is at the very least on a par with EJB 2. And given that the jBoss source is available and free, you should seriously consider migrating to it.

You see, Sun had very little real choice but to produce EJB 2, and to write a book like this, in part simply to stay competitive with jBoss and other application servers like IBM's Websphere and BEA's Weblogic. Run and run just to stay in place.

Other Reviews

• A Solid, But Not Exceptional EJB Book
• Example-filled & highly practical
• Gerbil on a treadmill
• New edition is excellent
• Good book, but outdated.