Book Image

Developing Web Applications with Oracle ADF Essentials

Book Image

Developing Web Applications with Oracle ADF Essentials

Overview of this book

With ADF, Oracle gives you the chance to use the powerful tool used by Oracle's own developers. Modern enterprise applications must be user-friendly, visually attractive, and fast performing. Oracle Fusion Applications are just that; but to get the desired output you need proven methods to use this powerful and flexible tool to achieve success in developing your enterprise applications. "Developing Web Applications with Oracle ADF Essentials" explains all you need to know in order to build good-looking, user-friendly applications on a completely free technology stack. It explains the highly productive, declarative development approach that will literally have your application running within a few hours, as well as how to use Java to add business logic. "Developing Web Applications with Oracle ADF Essentials" tells you how to develop and deploy web application applications based on the highly productive and free Oracle ADF Essentials framework. You will first learn how to build business services on top of database tables, and then how to easily build a web application using these services. You will see how to visually design the flow through your application with ADF task flows, and how to use Java programming to implement business logic. Using this book, you can start building and deploying advanced web applications on a robust, free platform quickly. Towards the end, you will be ready to build real-world ADF Essentials applications and will be able to consider yourself an ADF Essentials journeyman.
Table of Contents (16 chapters)
Developing Web Applications with Oracle ADF Essentials
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Index

Building task flows


A web application consists of a number of pages that must be displayed to the user in a specific sequence. This sequence is not fixed—the user might make a decision as to which page they want to see next, or the application might decide to show a specific page with a warning or a request for more information.

If we did not have a controller layer, each page would have to contain both the actual components on the page as well as the logic to decide where to go next. This intermingling of functionality quickly becomes hard to maintain and is not considered a good programming practice.

That is why we have a controller layer to control the flow through the application. The controller layer manages the logic of what happens in which order so that the individual pages or code elements do not have to worry about this part of the application.

Bounded and unbounded task flows

Every application has one unbounded task flow—we saw that in the simple demo application in Chapter 1, My...