The EJB 3 (Enterprise Java Beans version 3) specification is a core component of enterprise-level JEE (Java Platform Enterprise Edition) implementations and this improved version is set to simplify the development of Enterprise Java applications.
This book covers the core elements of EJB 3 technology, exploring them in a concise manner with many supporting examples. You will gain a thorough understanding of EJB 3 technology and learn about the most important features of EJB 3 quickly.
This book will teach you the core elements of EJB 3 technology. You will:
Gain a rapid introduction to the EJB 3 essentials while learning about the underlying principles
Create Entities, Message-Driven Beans, Session Beans and their clients
Look at running an EJB client from an application client container
Learn how to package and deploy an EJB
Use JQPL (Java Persistence Query Language)
Explore the entity manager interface
Learn about object/relational mapping with EJB 3
Look at the Java Messaging API and message-driven beans
Look at transactions, interceptors, and EJB timer services
Understand how EJB 3 differs from the 2.x version
Implement EJB 3's security features
This book is a fast-paced tutorial that explores the key features of EJB 3 with many accompanying examples. This book is not a complete reference guide, but a concise exploration of EJB 3's core elements. This book is primarily aimed at professional developers who already have a working knowledge of Java. Enterprise architects and designers with a background in Java would also find this book of use. Previous experience of working with Java is essential and knowledge of relational databases is desirable.
As this book is an introduction to EJB 3, it is aimed at those who are new to EJB 3. As the new version of EJB is so radically different from the previous version (EJB 2.x), the book is suitable for and should be of interest to those who have had experience working with EJB 2.x. The text makes it clear where the differences between the versions of EJB lie, although they are not explored in detail.
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EJB 3 Developer Guide 
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