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

Seam debug page


One of the benefits of using the entire Seam Framework in this manner is that we have full access to all of the facilities provided by Seam, including the Seam debug page. If an unknown exception is thrown within our application (that is, we have not catered for it within the pages.xml file), then the Seam debug page will be displayed. This page can also be accessed at any time by browsing to http://localhost:8080/vacationplanner/debug.seam.

The seam-debug.jar file provides the Seam debug page functionality. Therefore, this type of debug functionality is available only if the JAR file is on the application's classpath. SeamGen automatically adds this JAR file into projects, however, if you are not using SeamGen, you will need to manually add the JAR file into your project's classpath to gain this functionality. The JBoss Seam Debug Page is shown in the following screenshot:

The Seam debug page shows all of the Seam components that are available within the application, including...