Integrating EJB 3.0 into Web Dynpro Using the EJB Model Importer 

 

Introduction

This tutorial covers all the steps necessary for using existing business functions from within a Web Dynpro application. The business functions are provided in the form of an Enterprise JavaBean (EJB) application where the business logic is implemented through a stateless session bean. In order to use the existing functions in the Web Dynpro application, we will import a model that facilitates its usage.

The current version of the EJB model importer works only with Development Component (DC) based projects in the Developer Studio. The standard projects are not supported so far. To create EJBs for example, you have to set up your project in form of an (local) EJB DC.  

Sample Application

This sample application manages students and their courses. The business logic resides in an EJB 3.0 session bean, while the user interface is developed using Web Dynpro for Java. The goal of this tutorial is to provide a simple Web Dynpro application which allows you to get a student’s details (such as age, address) upon entering the student’s name.

Objectives

By the end of this tutorial, you will be able to:

• Set up DC based projects in the Developer Studio.
• Prepare Java EE 5 DC projects for use by other components (such as in Web Dynpro).
• Generate a model to be used for linking up the business logic of the EJB project from within the Web Dynpro project.
• Create the context in the view controller in such a way so that a connection to the model is defined.
• Define the data binding for the UI elements.
• Add the Java code required when accessing the model in Web Dynpro.

 

Prerequisites

Systems, installed applications, and authorizations

• You have installed the SAP NetWeaver Developer Studio on your desktop.
• To be able to deploy and run the sample application, the application server must be up and running.

Knowledge

• You are experienced in working with the SAP NetWeaver Developer Studio.
• You have acquired some basic experience with Web Dynpro applications.
• You have basic knowledge of the EJB 3.0 programming model.

 

Next Step

Creating EJB Development Component (DC)