EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

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.

EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

Credits

About the Author

About the Reviewers

Preface

Free Chapter

What's New in EJB 3.0

Metadata annotations

Configuration defaults

Environmental dependencies and JNDI Access

Simplified Session Beans

Simplified entity beans

Java Persistence API

Interceptors

Simplified checked exceptions

Callback Interfaces

Summary

Converting an EJB 2.0 Entity to an EJB 3.0 Entity

Setting the environment

Converting the entity class

Developing a session façade for an entity

Summary

EclipseLink JPA Persistence Provider

Specifying the EclipseLink persistence provider

The JPA framework

What is required for JPA?

Types of entity managers

EclipseLink JPA

EclispeLink JPA Persistence unit properties

Summary

Building an EJB 3.0 Persistence Model with Oracle JDeveloper

Setting the environment

Creating a datasource in JDeveloper

Creating an EJB 3 application

Creating an EJB 3 entity bean

Creating a session bean

Creating and testing a test client

Summary

EJB 3.0 Persistence with Oracle Enterprise Pack for Eclipse

Setting the environment

Configuring WebLogic Server with MySQL database

Creating a JPA project in Eclipse

Creating an EJB 3.0 entity bean

Creating a Persistence Configuration file

Creating a session bean

Creating a test client

Deploying the entity in WebLogic Server

Summary

EJB 3.0 with ADF Faces UI

Setting the environment

Creating an EJB 3 entity bean from Oracle database

Creating a session bean

Creating an Oracle ADF Faces client user interface

Testing the Oracle ADF Faces user interface

Summary

Creating EJB 3.0 Entity Relationships

EJB 3.0 entity relationship annotations

Setting the environment

Creating the entity beans

Creating a session bean

Creating the client

Testing the client

Modifying the fetch strategy

Summary

EJB 3.0 Database Persistence with Ajax in the UI

The XMLHttpRequest Object

Setting the environment

Creating an EJB 3.0 application in JDeveloper

Creating an entity bean

Creating a session bean

Creating a servlet client

Creating an Ajax user interface

Deploying the EJB 3 application to WebLogic Server

Testing the Ajax input form

Summary

Using JSF with Entity Relationships

Setting the environment

Creating entity beans from tables

Creating a session bean

Creating JSF user interfaces

Running the JSF user interfaces

Summary

Creating an EJB 3.0 Web Service

Setting the environment

Creating a data source in the WebLogic server

Creating an entity bean

Creating a stateless session bean

Creating a Web Service class

Creating a web service client

Creating and packaging Web Service classes

Testing the web service

Summary

Customer Reviews

5 star

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3 star

2 star

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Creating a web service client

Next, we create a JAX-RPC Java client for the web service. First, create a Java class EJB3WSClient. In the Java client application, create an instance of the EJB3WSImplService service:

EJB3WSImplService service = new EJB3WSImplService();

Obtain a proxy to the service from the service using the getEJB3WSImplPort() method:

EJB3WSImpl port = service.getEJB3WSImplPort();

Invoke the testClient() web service method of the service:

String result = port.testClient();

The Web Service Client class is listed as follows:

package model;
import java.util.Properties;
import javax.naming.InitialContext;
import javax.naming.NamingException;
package model;
public class EJB3WSClient {
public EJB3WSClient() {
}
public static void main(String[] args) {
EJB3WSImplService service = new EJB3WSImplService();
EJB3WSImpl port = service.getEJB3WSImplPort();
String result = port.testClient();
System.out.println(result);
}
}

EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

Overview of this book

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EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g

Creating a web service client