Software Architecture: Perspectives on an Emerging DisciplineGood software developers often adopt one or several architectural patterns as strategies for system organization. But, although they use these patterns purposefully, they often use them informally and nearly unconsciously. This book organizes this substantial emerging "folklore" of system design -- with its rich language of system description -- and closes the gap between the useful abstractions (constructs and patterns) of system design and the current models, notations and tools. It identifies useful patterns clearly, gives examples, compares them, and evaluates their utility in various settings -- allowing readers to develop a repertoire of useful techniques that goes beyond the single-minded current fads. KEY TOPICS: Examines the ways in which architectural issues can impact software design; shows how to design new systems in principled ways using well-understood architectural paradigms; emphasizes informal descriptions, touching lightly on formal notations and specifications, and the tools that support them; explains how to understand and evaluate the design of existing software systems from an architectural perspective; and presents concrete examples of actual system architectures that can serve as models for new designs. MARKET: For professional software developers looking for new ideas about system organization. |
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... changes on software design . Parnas shows that different problem decompositions vary greatly in their ability to withstand design changes . Among the changes he considers are the following : 1. Changes in the processing algorithm : For ...
... changes in the overall processing algorithm , data repre- sentations , and reuse . On the other hand it can achieve relatively good performance , by virtue of direct sharing of data . Further , it is relatively easy to add a new ...
... changes : Only changes in small details of behavior occur across devices , for example , in the appearance of menus . Global behavior changes : There are major changes in surface user - interface behavior across devices , for example ...