Book Image

EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

Book Image

EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

Overview of this book

EJB (Enterprise JavaBeans) 3.0 is a commonly used database persistence technology in Java EE applications. EJB 3.0 has simplified the development of EJBs with an annotations-based API that eliminates the use of remote/local interfaces, home/local home interfaces, and deployment descriptors. A number of other books are available on EJB 3.0, but none covers EJB 3.0 support in Oracle Fusion Middleware 11g, which is one of the leaders in the application server market.This is the first book that covers all aspects of EJB 3.0 database persistence development using Oracle Fusion Middleware technology. It covers all the best practices for database persistence ensuring that your applications are easily maintainable. Leaving theory behind, this book uses real-world examples to guide you in building your own EJB 3.0 applications that are well integrated with commonly used Java EE frameworks.The book gets going by discussing the new features in the EJB 3.0 specification. As some readers may still be using EJB 2.0, the book explains how to convert your EJB 2.0 entity beans to EJB 3.0. It then goes on to discuss using EJB 3.0 database persistence with JDeveloper, WebLogic Server, and Enterprise Pack for Eclipse, the main Java EE components of Oracle Fusion Middleware 11g. The book also covers EJB 3.0 relationships and integrating EJB 3.0 relationships with JSF user interfaces. EJB 3.0 database persistence with some of the commonly used frameworks such as ADF Faces, AJAX, and Web Services is also discussed in the book. It uses the integrated WebLogic Server 11g in some of the chapters and the standalone WebLogic Server in other chapters. While JDeveloper is the primary Java IDE used in the book, one of the chapters is based on the Oracle Enterprise Pack for Eclipse.By the time you reach the end of this book, you will be well-versed with developing EJB 3.0 applications using the different Java EE components of Oracle Fusion Middleware 11g.
Table of Contents (15 chapters)
EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g
About the Author
About the Reviewers

Creating a stateless session bean

As we already discussed, it's always a good practice to create a session bean façade for an entity bean. This is done to ensure that the entity bean is not directly accessed by a client. To create a session bean, follow the given steps:

  1. 1. Select the EJB3Model project and select File | New.

  2. 2. In the New Gallery window, select Categories | Business Tier | EJB and Items | Session EJB. Click on OK.

  3. 3. Specify the EJB Name as CatalogSessionEJB. Select Session Type as Stateless and Transaction Type as Container. Specify a mapped name (EJB3-SessionEJB). The Generate Session Façade Methods checkbox is selected by default. The Entity Implementation is JPA Entities by default. The persistence unit is em. Click on Next.

  4. 4. Select the default JPA Entity Methods to create and click on Next.

  5. 5. Specify the Bean Class (model. CatalogSessionEJBBean) and click on Next.

  6. 6. Select the EJB business interface to implement. Select the Implement a Remote Interface checkbox, and specify...