9th Circle of Hell: Betrayal. In this circle resides the author of this book, guilty of having once ported an application from JBoss AS to Oracle Weblogic Server, in exchange for 30 pieces of silver.
The last chapter of this book teaches the reader how to write fast and efficient web applications on the JBoss web server. From a bird's eye view, all web applications can be roughly divided into two broad areas:
Business-to-Consumer (B2C) applications, where the user interacts with legacy systems by means of an interface, usually a browser. The archetype of a B2C application is engineered using dynamic web pages (JSP/Servlets) and/or frameworks based on a component-driven UI design model (JSF).
Business-to-Business (B2B) applications: They typically require exchange of information between businesses and their legacy systems. Common examples of B2B application are web services, which are a common paradigm to integrate heterogeneous systems.