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A System of Patterns: Pattern-Oriented Software Architecture: 1 (Wiley Software Patterns)

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It is a shame that this excellent book does not receive the same level of attention (at least in the U.S.) as the Gang of Four's Design Patterns: Elements of Resusable Object-Oriented Software. Pattern-Oriented Software Architecture is more comprehensive in scope and, to my mind, better written. In particular, it provides a solid, highly pragmatic framework for understanding and utilizing patterns at 3 levels of scope/abstraction -- i.e., architecture, design, and implementation -- not only design. Moreover, the authors pay significant attention to variations of patterns, trade-offs between alternative patterns, and the relationships between patterns that in practice may need to be combined in order to accomplish the objectives at hand. The book's overall organization, presentation of material, and referencing of related pattern sources (including the GoF's work) is superb. This is my top patterns reference, with others as serving as adjuncts.

While I have argued since it came out that the G of 4 book is the most important programming book of the decade, I have to agree with the other, lone reviewer here, that this is a deeper, more mature work. I rediscovered this book when Alan Holub's series of recent articles began to appear in JavaWorld about implemnting UIs and I realized that he was taking a lot of his ideas from Buschman. One of the reasons I bring this up is that it made me realize that this is the great thing about this book: it dares to wrestle some of the complex issues and tradeoffs to the ground, presenting the reader with a more useable guide to the practice of implementing patterns. You may have read John Vlissides' (Go4 author) comments about how for years after the publication of his book he'd ask when he spoke who had read the book and nearly everyone would raise their hands, then he'd ask who wanted to come up and explain the momento pattern or the bridge and only a couple of people's hands would be raised. This is in part due to the fact that the Go4 book encourages the concept of simple ICs that can just be retrieved and plugged in. In reality, as anyone who has read Vlissides' other book which spends its whole duration talking just about Visitor, the opposite is true. Buschman's book is the best in this regard at spanning the range of design issues but still dealing with the complexities of implementation, and helping the reader through the process of assessing trade-offs and still matching requirements.

Definitively, after reading the GoF book, get this one ! The Design Patterns receive more attention in my own opinion, because patterns newcomers (I was one of them, few years ago) found at first (nices) solutions that may be applied directly. It take a little time to understand that the great idea is elsewhere. POSA book (this one) tackle directly to this great idea, and exposes several patterns categories (3, in fact). Architectural patterns are really well explained, much better than in the GoF. The POSA book receive less attention probably because authors forget the idea to "attract" newcomers, at least in my mind. Anyway, the Design Patterns is my "book of the Decade". I consider this one as the second to purchase in the patterns movement, but it's not a second hand material, it's a complementary materials.

Mir kam das Buch altbacken, spröde, unverbindlich, und, wenn es einmal konkret wurde, umständlich vor; kein Vergleich zu GoF.