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PowerBuilder® 9: Internet and Distributed Application Development by John D. Olson, Bill Green

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Basic Requirements

As you learn about how to leverage code reuse and accelerate application development through the use of frameworks, you have to ask this question: “What is really needed in a framework?” If you want to develop a simple framework that does just what you want it to do, what are the basic requirements? If it's a simple framework it will be fast, stable, and scalable. The larger the framework is, the slower it will run. It will also become less stable and scalable. This is due to more objects being brought into memory and consuming valuable server resources. A basic framework can be broken up into two key parts: communication between client and server, and services on the server.

Communication Between Client and Server

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