Michael Stal

Frank Buschmann

Hans Rohnert

Regine Meunier

Peter Sommerlad

A System of Patterns

Pattern-Oriented Software Architecture Volume 1

Douglas Schmidt

Patterns for Concurrent and Networked Objects

Pattern-Oriented Software Architecture Volume 2

This practical tutorial/reference demonstrates how patterns can enable you to create large-scale applications and solve recurring design problems. It contains a catalogue of 25 patterns, described in a standardized format, that you can use or adapt to your own development projects. Both a tutorial and a reference guide, this manual presents a number of techniques for solving recurring software design problems in a comprehensive fashion which includes many guidelines and constraints regarding practical applications.· Patterns· Architectural Patterns· Design Patterns· Idioms· Pattern Systems· Patterns and Software Architecture· The Pattern Community· Where Will Patterns Go?· Notations

PATTERN-ORIENTED SOFTWARE ARCHITECTURE: A SYSTEM OF PATTERNS, VOLUME 1

Douglas C. Schmidt

Pattern - Oriented Software Architecture A System of Patterns Frank Buschmann, Regine Meunier, Hans Rohnert, Peter Sommerlad, Michael Stal of Siemens AG, Germany Pattern-oriented software architecture is a new approach to software development. This book represents the progression and evolution of the pattern approach into a system of patterns capable of describing and documenting large-scale applications. A pattern system provides, on one level, a pool of proven solutions to many recurring design problems. On another it shows how to combine individual patterns into heterogeneous structures and as such it can be used to facilitate a constructive development of software systems. Uniquely, the patterns that are presented in this book span several levels of abstraction, from high-level architectural patterns and medium-level design patterns to low-level idioms. The intention of, and motivation for, this book is to support both novices and experts in software development. Novices will gain from the experience inherent in pattern descriptions and experts will hopefully make use of, add to, extend and modify patterns to tailor them to their own needs. None of the pattern descriptions are cast in stone and, just as they are borne from experience, it is expected that further use will feed in and refine individual patterns and produce an evolving system of patterns. Visit our Web Page http://www.wiley.com/compbooks/

Pattern-Oriented Software Architecture, A System of Patterns

Pattern-oriented software architecture is a new approach to software development. This book represents the progression and evolution of the pattern approach into a system of patterns capable of describing and documenting large-scale applications. A pattern system provides, on one level, a pool of proven solutions to many recurring design problems. On another it shows how to combine individual patterns into heterogeneous structures and as such it can be used to facilitate a constructive development of software systems. Uniquely, the patterns that are presented in this book span several levels of abstraction, from high-level architectural patterns and medium-level design patterns to low-level idioms. The intention of, and motivation for, this book is to support both novices and experts in software development. Novices will gain from the experience inherent in pattern descriptions and experts will hopefully make use of, add to, extend and modify patterns to tailor them to their own needs. None of the pattern descriptions are cast in stone and, just as they are borne from experience, it is expected that further use will feed in and refine individual patterns and produce an evolving system of patterns. Visit our Web Page http://www.wiley.com/compbooks/

Designing application software to run in distributed and concurrent environments is a challenge facing software developers. These patterns form the basis of a pattern language that address issues of distribution, concurrency and networking.

Pattern-Oriented Software Architecture, Patterns for Concurrent and Networked Objects

This chapter describes how to systematically prevent software architecture erosion by applying refactoring techniques. Software architecture modifications are common rather than the exception in software development. Modifications come in different flavors, such as redefining or adding requirements, changing infrastructure and technology, or causing changes by bugs and incorrect decisions. But no matter where these changes originate, they need special attention from software architects. Otherwise, if software architects merely focus on adding new features—(changes or extensions that by themselves might not be adequate), design erosion will be the final result. In a systematic approach, software architects evaluate the existing software design before adding new artifacts or changing existing ones. Whenever they identify architecture problems, they immediately resolve architectural issues, thus assuring high quality and sustainability. Software architecture refactoring enables such iterative architecture improvement. It consists of indentifying problems, applying the right refactorings, and testing the results. Architecture refactoring is often combined with code refactoring activities to add the best value. Refactoring patterns offer proven solutions for recurring architectural problems, hence providing a toolset to software engineers.

Michael Stal

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