Book Image

Digital Java EE 7 Web Application Development

By : Peter Pilgrim
Book Image

Digital Java EE 7 Web Application Development

By: Peter Pilgrim

Overview of this book

Digital Java EE 7 presents you with an opportunity to master writing great enterprise web software using the Java EE 7 platform with the modern approach to digital service standards. You will first learn about the lifecycle and phases of JavaServer Faces, become completely proficient with different validation models and schemes, and then find out exactly how to apply AJAX validations and requests. Next, you will touch base with JSF in order to understand how relevant CDI scopes work. Later, you’ll discover how to add finesse and pizzazz to your digital work in order to improve the design of your e-commerce application. Finally, you will deep dive into AngularJS development in order to keep pace with other popular choices, such as Backbone and Ember JS. By the end of this thorough guide, you’ll have polished your skills on the Digital Java EE 7 platform and be able to creat exiting web application.
Table of Contents (21 chapters)
Digital Java EE 7 Web Application Development
About the Author
About the Reviewers

Flow definitions and lifecycle

Faces Flows use the @FlowScoped beans where the user can enter a single page, which is known as the start page. After entering the flow, the user can navigate the pages, which are associated with the flow. The user can exit the flow at predefined points. A flow can invoke a nested flow.

The lifecycle of the @FlowScoped beans is greater than the @ViewScoped beans, but shorter than that of @SessionScoped. Therefore, we can compare flow scoped beans to their conversational brethren. A @ConversationalScoped bean maintains a state for all the views and web page tabs in a browser. Like their conversation mates, the @FlowScoped beans survive multiple requests; in fact, they are even better, because they have different instances for multiple windows in a session. The flow-scoped bean is not shared between browser tabs.

As the user enters and leaves the flows in the application, Faces Flows has a dedicated CDI scope, which the JSF framework implementation uses to activate...