EJB Examples

This sample database contains a collection of live code examples that illustrates techniques for implementing Enterprise JavaBeans (EJBs) in your applications.

These examples reside in the Examples3_EJB database.

This page covers the following topics:

• Description of the Examples3_EJB database
• How to get started
• EJB techniques
• Where to find more information

Description of the Examples3_EJB database    

The Enterprise JavaBeans Specification provides a framework that allows you to build reusable Java-based components that are remotely accessible, transactional, and secure.

In the Examples3_EJB database, you will find examples that demonstrate the following techniques for implementing EJBs in real-world applications:

• Using a stateful session bean to implement persistence across client calls.
• Developing an entity bean with container-managed persistence that shows entity bean methods and database interactions, such as creating, deleting, and modifying rows. This example also illustrates expression and method-style finders.
• Performing a tax calculation using different technologies: a session bean, an entity bean, and an invoked object.
• Implementing an ATM simulation using different technologies: an entity bean with container-managed persistence, an entity bean with bean-managed persistence, and a session object (without EJBs).

How to get started    

To begin exploring these examples, follow these steps:

1. Install and run the Examples3_EJB database.
   
   The application starts up in your browser, as shown:
   
   
2. Browse through the list in the left navigation pane and select examples of interest.
   
   The example you select opens in the right pane, where you can interact with its controls, as shown in this display:
   
   

EJB techniques    

    To learn how to implement EJB technologies and access sample code that you can incorporate in your applications, go to Application Techniques in the help system: Enterprise JavaBean Techniques.

Where to find more information    

    For introductory information about EJBs, see the following chapters in Getting Started in the help system:

• EJB Entity Bean Quick Start
• EJB Session Bean Quick Start

    For technical information about implementing EJBs, see the following chapters in the Programmer's Guide:

• Using EJBs with SilverStream Applications
• Writing Entity Beans
• Writing Session Beans
• Deploying EJBs
• Understanding Deployment Descriptors
• Calling EJBs