This book provides a thorough introduction to EJB for the enterprise software developer. It shows you how to develop enterprise Beans to model your business objects and processes. It also shows you how to develop client applications that use the Beans to perform useful work. One powerful advantage of the EJB architecture is that it allows you to partition work appropriately between different parts of the system: the database provides persistence, your Beans model various business entities and the interactions between them, and your client application provides a user interface, but incorporates minimal business logic. The end result is a highly flexible system built from components that can easily be reused, and that can be changed to suit your needs without upsetting other parts of the system. Enterprise JavaBeans teaches you how to take advantage of the flexibility and simplicity that this powerful new architecture provides.
This book covers:
Appendices show in detail how to deploy Beans with the most popular EJB servers....Continua
Ok, let me start by saying that the author of this book is indeed well prepared and able to go into detail in his explanations. If you are really interested in programming with EJB this is one of the books you should check, despite its many flaws.. The first three chapter make
a fully successful attempt to protect the mysteries of J2EE from
profane eyes by putting a deep sleep spell on the reader.
If you survive it you will probably find yourself wondering about the order in which the story is told...
First a hurried example involving a session bean collaborating with an entity bean, then one chapter on the client side (which of course you need to understand how the heck you could have tested the beans just developed), then entity beans get presented again but this time in more detail.. only you get to know first the CMP flavour (which is the more complicated) and the BMP flavour after, totally against what common sense would advice. Then you go into session beans, which , being simpler than entities should have been presented before..and how about a chapter 16 on deployment descriptors? They are the configuration files you need to deploy ANY EJB and you explain them at the end of the book? The impression is this author would be much better if he stopped thinking by compartments
and trying to make things appear much more difficult and deep than what they actually are. Also, the workbooks with the exercises for this text are a joke. You will be presented with
canned code and a few ant scripts to execute, compile, build
deploy and run the code. Very kewl but if you know what you are doing you can do it yourself and if you don't .. well clicking on a few batch files or executing ant scipts won't teach you much I can assure you..