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

JSF and CDI scopes

There has been some confusion before Java EE 7 about which annotations are correct to declare the managed beans. The issues are that the JavaServer Faces specification predates the later standard from the CDI and the fact that the scoping overlaps. The history of scopes comes from the original design and definition of the servlet container and providing convenience to the application developer. A scope is simply a map collection of name/value pairs. It helps to think of them as java.util.Map type hash map collections. The scopes differ in their life span.

For CDI, the package name is javax.enterprise.context, and for JSF managed beans, the package is javax.faces.bean.

Bean scopes

An @RequestScoped annotation denotes a controller with a lifecycle that has the duration for the Faces request and response. The request-scope is short-lived. It begins when the web client submits an HTTP request and is then processed by the servlet container. The scope ends when the response is...