Book Image

Seam 2.x Web Development

Book Image

Seam 2.x Web Development

Overview of this book

The Seam framework from JBoss allows developers to use JSF, Facelets, EJB, and JPA to write conversational web applications. But you will first have to learn how these standard technologies are integrated using Seam and how they can be built upon using additional Seam components. If you need to build a Java web application fast, but don't have time to learn all these complex features, then this book is for you. The book provides a practical approach to developing Seam applications highlighting good development practices. It provides a complete walk through to develop Web applications using Seam, Facelets, and RichFaces and explains how to deploy them to the JBoss Application Server. You can start using key aspects of the Seam framework immediately because this book builds on them chapter by chapter, finally ending with details of enterprise functionality such as PDF report generation and event frameworks. First, the book introduces you to the fundamentals of Seam applications, describing topics such as Injection, Outjection and Bijection. You will understand the Facelets framework, AJAX, database persistence, and advanced Seam concepts through the many examples in the book. The book takes a practical approach throughout to describing the technologies and tools involved. You will add functionality to Seam applications after you learn how to use the Seam Generator RAD tools and how to customize and fully test application functionality. Hints and tips are provided along the way of how to use Seam and the JBoss Application Server.
Table of Contents (17 chapters)
Seam 2.x Web Development
Credits
About the author
About the reviewers
Preface

User authentication


User authentication is the process of establishing user credentials within an application, and verifying that a user is who they claim to be. Typically, within most desktop and web applications, this is performed via a combination of a username and a password that is known only to the user.

Typically, within a Java EE application, JAAS (Java Authentication and Authorization Service) is used to validate user credentials. JAAS is a very powerful framework, but that can come at a cost, as using JAAS can be complicated for novice developers, and can be quite complicated to develop against.

Whilst JAAS is a standard, the method of deploying it on different application servers is different; hence, if you develop an application that uses JAAS on the JBoss Application Server, you will need to make modifications to enable your application to run on the GlassFish application server or on Oracle's Weblogic server. Seam security, on the other hand, can be deployed to different application...