Wiring Your Web Application with Open Source Java

ONJava.com: Wiring Your Web Application with Open Source Java: "Building non-trivial web applications with Java is no trivial task. There are many things to consider when structuring an architecture to house an application. From a high-level, developers are faced with decisions about how they are going to construct user interfaces, where the business logic will reside, and how to persist application data. Each of these three layers has their own questions to be answered. What technologies should be implemented across each layer? How can the application be designed so that it is loosely coupled and flexible to change? Does the architecture allow layers to be replaced without affecting other layers? How will the application handle container level services such as transactions? "