Choosing a Business Service for the Oracle ADF Application

Background

Within JDeveloper, application developers can work with data sources based on entirely different business service technologies:

Oracle ADF Business Services is a productive framework that lets you benefit from the many J2EE design patterns this Oracle technology provides.
Oracle ADF TopLink POJO helps you to leverage an existing object model in Java, and integrate it with the database.
Enterprise JavaBeans technology is a non-framework-based alternative to the two Oracle technologies which works with an J2EE-complaint application server to manage transactions .
JavaBeans technology lets you implement your own framework for data retrieval, persistence, and manipulation of Java objects.
Web services is an alternative to the above business services when you do not need to create the back end business service but want to expose existing business services, including ADF Business Components, EJB components, stored procedures in the database, or other business services written in Java or any other language.

When you want to work with a specific business service, you can open the New Gallery and use the provided wizards and dialogs to create or, in the case of web services, expose the entities in your Model project:

If you want to....	Then choose among these New Gallery items...
Use Oracle ADF Business Components in the Model project.	Business Components in the Business Tier category
Use EJB components in the Model project.	Enterprise JavaBeans (EJB) in the Business Tier category.
Use Oracle TopLink in the Model project	TopLink in the Business Tier category
Use web services that were created based on legacy code, software components (such as EJB components), or even PL/SQL in the database and make it accessible through HTTP quickly and easily	Web Services in the Business Tier category
Use JavaBeans in the Model project.	JavaBeans in the General category

Tasks

The procedure for working with business services in JDeveloper and Oracle ADF is the same for most business services.

To prepare your Model project for the business services:

Create the application workspace using the desired application template (does not apply to web services based applications).
Create the entities of the business service.
Register the business services entities with the ADF data control technology.

When you want to work with web services, the procedure differs.

To use web services as your business service: