Book Image

EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

By : Deepak Vohra, Deepak Vohra
Book Image

EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

By: Deepak Vohra, Deepak Vohra

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 test client

We have created an entity bean that contains the business logic. We have created a session bean that is a wrapper for the entity bean. Next, we shall create a test client JSP in which we shall invoke the test() method of the session bean. For the web application component, we need to create a web module folder, a WEB-INF folder in the web module folder and a web.xml in the WEB-INF folder. To create a JSP in the webModule folder, right-click on the webModule folder and select New | Other.

In the New window, select Web | JSP and click on Next.

In the New Java Server Page window, select the webModule folder and specify the JSP File name as catalog.jsp. Click on Finish, as shown next:

The catalog.jsp JSP gets added to the webModule folder. The catalog.jsp is shown below, including the JSP code, which we shall discuss next:

We shall create an instance of CatalogTestRemote using JNDI lookup for which we need to create an IntialContext object. We need to set the InitialContext...