Enterprise Java Beans (EJB 3.0) - Tutorials and Articles for EJB 3

Introduction to Enterprise JavaBeans 3.0
The EJB 3.0 specification makes it easier than ever to develop Enterprise JavaBeans, perhaps encouraging you to consider developing EJBs for the first time. If that is the case, congratulations, you have successfully avoided the many pitfalls of EJB developers before you, and can enjoy the ease of EJB 3.0 development. But before you start development, you might want to know what Enterprise JavaBeans are and what purpose they serve. This article explains the basics of EJBs and how you can utilize them in a J2EE application.

Simplifying EJB Development with EJB 3.0
Enterprise JavaBeans (EJB) has been criticized by many developers for its complexity. EJB 3.0, being worked under JSR-220 of the Java Community Process, is designed to simplify development of applications and standardize the persistence API for the Java platform.

Preparing for EJB 3.0
You don't have to look far to see how excited people are about the new direction EJB 3.0 is taking. In fact, the entire J2EE component suite has a mandate to simplify the development process, and we can all look forward to a time when it will be much easier to develop, test and deploy our enterprise applications. EJB 3.0 is taking ease of development extremely seriously and has adjusted its model to offer the kind of POJO (Plain Old Java Object) persistence that TopLink has been doing for a decade.

Migrate J2EE Applications for EJB 3.0
The programming model for Enterprise JavaBeans (EJBs) has been simplified dramatically in EJB 3.0 and is being hailed by Java developers as the new standard of server-side business logic programming. Meanwhile, the existence of thousands of J2EE applications written with earlier versions of the EJB API has raised concerns about both the interoperability of EJB 3.0 with these applications and migrating the applications to use EJB 3.0.

Using Dependency Injection in Java EE 5.0
Dependency injection, or inversion of control (IOC), is today's latest development craze. IOC containers such as Spring have become popular because they simplify the complexities of enterprise Java that come mostly from Java Naming and Directory Interface (JNDI). In this article, I'll discuss how you can use dependency injection in the upcoming Java EE 5.0 specification for resources and services. I migrated the J2EE 1.4 Blueprint application Java Adventure Builder to use EJB 3.0, web services metadata, and dependency injection; I'll use this application to illustrate concepts in this article.

Standardizing Java Persistence with the EJB3 Java Persistence API
Persistence is critical for most enterprise applications because they require access to relational databases such as Oracle Database 10g. If you're developing applications using Java, you're probably responsible for mundane tasks such as database updates and retrieval, which you do by writing JDBC and SQL. Over the last few years, several object-relational (O-R) mapping frameworks such as Oracle TopLink and JBoss Hibernate have become popular because they make persistence challenges simpler, freeing Java developers to write JDBC code and let them concentrate on business logic. Java standards such as EJB 2.x container-managed persistence (CMP) entity beans have also tried to solve persistence challenges but have been less successful.

Accessing EJB 3 Session Beans from a Java SE Client
I was asked a couple of times by various people how can one access session beans from code which is not managed by the Glassfish application server. I didn't know the answer so I went and investigated. I decided to write results of my research down because it seems to be quite a common question.

What's New in EJB 3.0
This article looks at the various new features introduced in the Enterprise JavaBean (EJB) 3.0 specification and how they'll make developing EJBs easier. The main theme of the EJB 3.0 is ease of development, which is the purpose of the new features in this release.