Foreword
In recent years, a large amount of software development activity has migrated from
the client to the server. The client-centric model, in which a client executes complex
programs to visualize and manipulate data, is no longer considered appropriate for the
majority of enterprise applications. The principal reason is deployment—it is a
significant hassle to deploy client programs onto a large number of desktops, and to
redeploy them whenever the application changes. Instead, applications are redesigned
to use a web browser as a "terminal". The application itself resides on the server,
formatting data for the user as web pages and processing the responses that the user
fills into web forms.
If you set out to develop a web application, you need to choose a technology that has
several important characteristics. You need to generate large amounts of dynamic
HTML conveniently. You require access to databases and other services. The
technology must provide an architectural foundation for performance and stability.
Finally, you must be able to partition your program logic in a way that allows for
future growth and maintainability.
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