Business Component Factory : A Comprehensive Overview of Component-Based Development for the Enterprise Review

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Business Component Factory : A Comprehensive Overview of Component-Based Development for the Enterprise ReviewThis book is the first I have read that really tackles all aspects of what is required for Enterprise Application Development through a CBD approach.
By defining the levels of component granularity and a recursively discrete approach to breaking a business problem down into components and their constituents as finer grained components, the true requirements for CBD are evident and determined. Many books I have read make the same mistake of only discussing development of components at one level (usually what Herzum defines as the distributed component level) and fail to address the many of the aspects of CBD that are not covered by development alone (deployment, testing, management, integration, and a roadmap for the development process and managment of that process through to delivery of a component based system). The book also talks and applies the component levels to the commonly depicted 4 tier architecture and importantly introduces the concept of components needing to be not only strongly typed for internal systems but also strongly tagged (supporting XML based component messaging/invocation) for virtual and extended systems. The coverage of what is required from a Component Execution Environment (CEE) when components are more course grained than simple distributed components is well covered and continues to define the true requirements for a Business Component Execution Environment (BCVM).
The book is a must read for anyone serious about adopting CBD on and enterprise scale. The book goes well beyond the common text available for CBD (that all concentrate on the short sighted development requirements for distributed components in a fine grained component containment model). I agree with another reviewer that for those of us that have been developing systems in EJB, COM+/DCOM and CORBA much of the book covers lessons we have painfully had to learn in developing multiple component based systems that have to inter-operate, but it goes beyond that in looking at what is necessary for component based systems at the next architectural level (one that may well incorporate disparate distributed component models).Business Component Factory : A Comprehensive Overview of Component-Based Development for the Enterprise OverviewIn this book, Peter Herzum and Oliver Sims present a complete component based strategy, the business component approach, that applies and extends component thinking to all aspects of the software life cycle for enterprise systems. The approach includes a conceptual framework that brings components into the world of scalable systems, and outlines the different component granularities.It also includes a methodology that goes beyond current object-oriented practices to provide the concepts required to meet the real challenges of component-based development. Using their business component approach, the authors then provide a blueprint for a business component factory--a development capability that can produce software with the quality, speed, and flexibility needed to match changing business needs. Sprinkled with guidelines, tips, and architectural patterns, this book fully prepares you for the approaching component revolution.Praise for Business Component Factory". . . this book should be very useful for anyone considering the daunting task of adopting component software on an enterprise scale."-Clemens Szyperski (Microsoft Research), Author of the award-winning book, Component Software: Beyond Object-Oriented Programming"Herzum and Sims do an admirable job of differentiating the different component concepts, allowing this clearly written book to focus on the construction of business systems by non-software practitioners, out of business component parts developed separately (and perhaps for a commodity component marketplace). This is the future of software systems, and this book is a practical, giant step in that direction."-Richard Mark Soley, PhD,Chairman and CEO, OMG"Finally, a book that takes you from component design all the way down to the middleware on which they are deployed. It?s an important contribution to the nascent server-side component discipline written by practitioners for practitioners."-Robert Orfali, Author of Client/Server Survival Guide, Third Edition and Client/Server Programming with Java and CORBA, Second Edition (both from Wiley)

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Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing (v. 4) Review

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Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing (v. 4) ReviewI don't have much to add over T. Anderson's review, but wanted to weigh in with a 5-star vote as a practicing distributed-systems architect. In particular I'm irritated by the one-star review from the person who obviously didn't understand what he/she was buying.
This is as close as you're going to get to a one-stop "encyclopedia" of patterns relevant to distributed computing (and other areas as well). I own most of the architecture/design patterns books, but this is the one I'll go to first for ideas, study, and use as a reference.
As for content, the catalogue of patterns is more comprehensive than any other volume I'm aware of and it is well organized. Each chapter describes a group of patterns that address recurrent vertical and horizontal architectural problem spaces. Each group is briefly introduced and described in the context of that. These introductions are pithy, on-target, and along with the complete pattern descriptions almost constitute a good introduction to distributed computing in general.
Most patterns are described in two pages in a format that has been well-honed over time for usefulness and comprehensibility. You find out where and when each pattern is likely to be useful, what motivates it, how it works, pros and cons, and what other patterns might be used with it.
The cross-referencing between patterns both within this book and in other sources is extensive and one of its most valuable features. The authors provide you with 114 pattern descriptions cross-referenced with "over 150" from other sources. That's a pretty extensive language!
Lots of spelling errors and such, but nothing that should confuse anyone.
This book is NOT a true encyclopedia, and you will want or need some of the core volumes that cover the "over 150" patterns that are referenced but not described here. The most notable are:
Patterns of Enterprise Application Architecture (The Addison-Wesley Signature Series)
Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions (The Addison-Wesley Signature Series)
Remoting Patterns: Foundations of Enterprise, Internet and Realtime Distributed Object Middleware (Wiley Software Patterns Series)
Most, if not all, of the material in Pattern-Oriented Software Architecture Volume 2: Patterns for Concurrent and Networked Objects is covered in Volume 4. If you don't have that book you might want it for deeper discussion of some of the patterns. On the other hand, the current volume contains important updates to a couple of patterns in the earlier volume.
If you're new to patterns, please avoid Design Patterns: Elements of Reusable Object-Oriented Software (Addison-Wesley Professional Computing Series), also known as the "GoF" (Gang of Four) book. It is a classic and the authors deserve their "props" for introducing design patterns to the broader development community, but it is the worst-written and most misleading book I've ever read on patterns. (In fairness to the authors, it was the "grand-daddy" of them all and perhaps they can be excused for not having the intervening 12 years of experience in pattern documentation to help them.)
I've heard good things about Head First Design Patterns (Head First) and Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and Iterative Development (3rd Edition) from people who have read the GoF book, so you might try that. I haven't read either myself.
If you're familiar with patterns and want perhaps the most comprehensive and useful single pattern book to date, especially if you're involved with the architecture of distributed systems, buy this!
It is not for beginners or those looking for boilerplate code!
Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing (v. 4) OverviewThe eagerly awaited Pattern-Oriented Software Architecture (POSA) Volume 4 is about a pattern language for distributed computing.
The authors will guide you through the best practices and introduce you to key areas of building distributed software systems. POSA 4 connects many stand-alone patterns, pattern collections and pattern languages from the existing body of literature found in the POSA series. Such patterns relate to and are useful for distributed computing to a single language.
The panel of experts provides you with a consistent and coherent holistic view on the craft of building distributed systems.
Includes a foreword by Martin Fowler
A must read for practitioners who want practical advice to develop a comprehensive language integrating patterns from key literature.


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Design Patterns: Elements of Reusable Object-Oriented Software Review

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Design Patterns: Elements of Reusable Object-Oriented Software ReviewThis book really changed my way of thinking about object-oriented design. The idea is that when designing a new class hierarchy, though implementation details may differ, you often find yourself using the same kinds of solutions over and over again. Rather than approaching each design task out of context as an individual, isolated problem, the strategy is to study the task and identify the underlying design pattern most likely to be applicable, and follow the class structure outlined by that pattern. It's a "cookbook" school of design that works amazingly well.
There are other advantages to this book. It isolates 23 of the most common patterns and presents them in detail. You wouldn't think that 23 patterns would be enough, but once you become adept at recognizing patterns, you'll find that a large fraction of the patterns you use in practice are among these 23. For each pattern, the book carefully presents the intent of the pattern, a motivating example, consequences of using that pattern, implementation considerations and pitfalls, sample code (C++ or Smalltalk), known uses of that pattern in real-world applications, and a list of related patterns.
Upon first reading, you will start to recognize these patterns in the frameworks you see. Upon second reading, you'll begin to see how these patterns can help you in your own designs, and may also start to see new patterns not listed in the book. Once you become familiar with the pattern concept, you will be able to originate your own patterns, which will serve you well in the future. One of the most valuable contributions of this book is that it is designed not merely to help you identify patterns, but to give you a sense of which patterns are appropriate in which contexts.
I think this book is particularly valuable to many C++ and Java programmers, because of the dynamic and flexible design philosophy it follows. (Its two fundamental principles of reusable OO design are: "Program to an interface, not an implementation" and "Favor object composition over class inheritance".) I've found that many C++ books unfortunately tend to emphasize a rather static and inflexible design philosophy. Many C++ programmers do not realize how the language and the books they've studied from have been limiting their thinking until they have been exposed to ideas from other lanugages. The authors of this book have obviously been influenced by other languages as well, especially Smalltalk, and have brought many of its best lessons to C++ design. Most Java books seem to take after the C++ books, even though Java is a more dynamic language. This book may help Java programmers take full advantage of the extra power offered by their language, if they look deeply enough into some of the lesser-known features its runtime system affords.
Last, but not least, this book is valuable because it names the patterns it uses, and so gives programmers a common vocabulary to describe design concepts, rather than particular implementations. You'll find yourself saying things like, "That would be a good use for a Decorator", or "Should we use a Facade or a Mediator in this case?" I encourage readers of this book to use this vocabulary with other programmers.
In summary, this is one of the few books that I think belongs on every programmer's "must-have" list. Not to overuse a cliche, but like object-oriented design itself, the pattern concept is one of those rare paradigm-shifts in computer programming. It is equally valuable to expert professional and novice student alike. The book has a home page at http://st-www.cs.uiuc.edu/users/patterns/DPBook/DPBook.htmlDesign Patterns: Elements of Reusable Object-Oriented Software Overview

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