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Object Design: Roles, Responsibilities, and Collaborations Paperback

ISBN-13: 078-5342379433 ISBN-10: 0201379430

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Product Details

  • Paperback: 416 pages
  • Publisher: Addison-Wesley Professional (November 18, 2002)
  • Language: English
  • ISBN-10: 0201379430
  • ISBN-13: 978-0201379433
  • Product Dimensions: 9.1 x 7.3 x 0.6 inches
  • Shipping Weight: 1.4 pounds (View shipping rates and policies)
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (15 customer reviews)
  • Amazon Best Sellers Rank: #592,900 in Books (See Top 100 in Books)

Editorial Reviews

From the Back Cover

If you create software using object-oriented languages and tools, then Responsibility-Driven Design has likely influenced your work. For over ten years Responsibility-Driven Design methodology has been the standard bearer of the behavioral approach to designing object-oriented software. Object Design: Roles, Responsibilities, and Collaborations focuses on the practice of designing objects as integral members of a community where each object has specific roles and responsibilities. The authors present the latest practices and techniques of Responsibility-Driven Design and show how you can apply them as you develop modern object-based applications.

Working within this conceptual framework, Rebecca Wirfs-Brock and Alan McKean present how user requirements, system architecture, and design patterns all contribute to the design of an effective object model. They introduce a rich vocabulary that designers can use to discuss aspects of their designs, discuss design trade-offs, and offer practical guidelines for enhancing the reliability and flexibility of applications. In addition, case studies and real-world examples demonstrate how the principles and techniques of Responsibility-Driven Design apply to real-world software designs.

You'll find coverage of such topics as:

  • Strategies for selecting and rejecting candidate objects in an emerging design model
  • Object role stereotypes and how to identify objects' behaviors
  • How to characterize objects using role stereotypes
  • Allocating responsibilities to appropriate objects
  • Developing a collaboration model
  • Strategies for designing application control centers
  • Documenting and describing a design, focusing on use cases, design conversations, and annotations
  • Strategies for enhancing reliability, including handling exceptions and recovering from errors
  • How to characterize software variations and design to support them for greater flexibility
  • How to categorize and treat various kinds of design problems
  • As all experienced designers know, software design is part art and inspiration and part consistent effort and solid technique. Object Design: Roles, Responsibilities, and Collaborations will help all software designers--from students to seasoned professionals--develop both the concrete reasoning skills and the design expertise necessary to produce responsible software designs.



    0201379430B08292002

    About the Author

    Rebecca Wirfs-Brock is founder of Wirfs-Brock Associates. She consults with clients on actual architecture and design projects as well as development practices and methods. She is the originator of the set of development practices known as Responsibility-Driven Design. Among her widely used inventions are use case conversations and object role stereotypes. She was lead author of the classic work Designing Object-Oriented Software (Prentice-Hall, 1990).

    Alan McKean is a respected object technology educator and cofounder of Wirfs-Brock Associates. His classes have introduced thousands of developers to object-oriented design and programming and his instructional techniques have been widely adopted by other educators. An experienced programmer, speaker, and instructor, Alan has developed curricula in object-oriented design, programming, and distributed object systems.



    0201379430AB08292002

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    Customer Reviews

    4.5 out of 5 stars
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    Despite the huge amount of information, I'm finding the book very readable.
    Walter Vannini
    These common sense lessons are essential for practitioners of design and systems architecting in all fields.
    T. Evans
    Reading this book at a later stage will seem like pure confirmation of all of your mistakes.
    Alfredo

    Most Helpful Customer Reviews

    41 of 41 people found the following review helpful By David C. Veeneman on January 23, 2003
    Format: Paperback
    I think I finally have a handle on object modeling-- 'Object Design' deserves a lot of the credit.
    I have a shelf full of books on UML, uses cases, patterns, and modeling. I spent almost a year struggling through UML, trying to understand the nuances of sequence diagrams versus collaboration diagrams. Meanwhile, I felt no closer to being able to create serviceable object models for my projects.
    Rebecca Wirfs-Brock and Alan McKean dispense with much of the tedious diagramming one usually associates with object modeling. Instead of charts and relationships, the book focuses on the roles, responsibilities, and behaviors that define an object. If you have ever assembled and managed employee teams, the framework will be very fmailiar. And that's where I found my breakthrough.
    The book offers a good introduction to object modeling for those new to the area, and a solid reference for those looking to stremline their current methodology. The processes suggested by the authors are simple and flexible. But they are powerful enough to handle even complex designs.
    One of the strongest pieces of advice in the book is to avoid rushing into UML software--stick with index cards until the design is fairly well developed. That's what got me out of a morass of charts and diagrams that looked nice, but did relatively little. I'd paraphrase the book's theme as "Forget the formalism and focus on your application's responsibilities, and how those responsibilities can be allocated among cohesive, well-organized team players.:
    The book is language neutral--it's focus is design, rather than programming. The design methodology taught in the book should be easily adaptable to nearly any object-oriented programming language.
    I have no hesitation recommending Object Design to novice and intermediate object modelers. I rate is as the best book I have read on the design and modeling of object-oriented systems.
    Comment Was this review helpful to you? Yes No Sending feedback...
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    21 of 21 people found the following review helpful By Walter Vannini on January 27, 2003
    Format: Paperback
    I purchased this book a week ago, and am enjoying it immensely. This
    is NOT a book by authors that rapidly churn out multiple books, and it
    is NOT a book to be read quickly. It's clear that a lot of thought
    has gone into every page and every sentence, and that you need to
    reflect and compare with your own professional programming experience.
    Despite the huge amount of information, I'm finding the book very
    readable. The authors make a living consulting on architecture and
    design, and know how to communicate.
    There are some code examples in java, but the book is really language
    neutral. The java code uses features that are available in all object
    oriented languages, and can really be considered to be illustrative
    pseudo code. This book is written for software architects, and coders
    who are looking to advance to higher levels of design responsibility.
    A nice touch that I appreciated was the short summarizing side bars
    sprinkled throughout the text. If you want to quickly evaluate whether
    this book is for you are not, just pick up the book and read the
    sidebars from beginning to end.
    Comment Was this review helpful to you? Yes No Sending feedback...
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    18 of 18 people found the following review helpful By T. Evans on July 20, 2003
    Format: Paperback
    I've always believed the best approach to object-oriented design is Responsibility Driven Design (RDD), and this is the best book on the subject-written by the inventor of RDD.
    I recently showed Mike Rosen, of Cutter Consortium, Object Design. Before I could say it had great chapters on RDD plus work on design for reliability and flexibility plus pages of references to related books and papers, he said 'Great! This will be my next book purchase'.
    So, why is Object Design: Roles, Responsibilities, and Collaborations (OD) a really great book? These folks have years of design consulting and teaching experience, know what they are talking about, and are good at telling the story.
    OD is a great read from cover to cover. Their two-chapter review of object design concepts was energetic, insightful, and comprehensive. From the beginning they are mixing in CRC cards (Thanks Kent, Ward!), architecture styles, patterns, and stereotypes into the discussion. This is the place to start for novices and intermediate students, and professionals now have the definitive reference book on object oriented design.
    The authors understand we all have different learning styles. Along with their conversation, the first two chapters also illustrate concepts and examples with over 20 figures, a couple of UML diagrams, three (short) Java code blocks, and eight CRC card drawings. Concrete examples are provided throughout the book, from computer speech to finance and telecommunications.
    The Chapter titles are: 1 Design Concepts, 2 Responsibility Driven Design, 3 Finding Objects, 4 Responsibilities, 5 Collaborations, 6 Control Style, 7 Describing Collaborations, 8 Reliable Collaborations, 9 Flexibility, and 10 On Design. Each chapter includes a summary.
    Read more ›
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    15 of 15 people found the following review helpful By wiredweird HALL OF FAMETOP 500 REVIEWER on July 28, 2004
    Format: Paperback Verified Purchase
    Wirfs-Brock and McKean have written an oustanding introductory book on object-oriented design. This is definitely a book for beginning OO programmers, the ones who aren't sure how to assign functions to objects and who aren't ready for design patterns yet. More experienced developers won't get much out of it, but that's OK. Every level needs its own reference books.

    The book's layout and illustrations present its content well. UML diagrams, for example, use one color and typeface for the actual UML notation. The same diagrams use a different color and typeface for notes that explain the UML. Unlike other books, there's no confusion about which is the tool and which describes the tool. The text is gentle and reasonably jargon-free, but I think it over-does the friendliness in places. In discussing a program's normal and exception handling behavior, the term "happy path" described the execution in the absence of errors. The term may be evocative, but is just a bit hard to take seriously.

    The sequence of topics makes good sense. It starts with the idea of a "responsibility," the basic unit of application logic. The authors develop this into strategies for defining objects, defining relationships between objects, and defining the control strategies that implement those relationships. They continue on through error handling (reliability) and extensibility - handling of future features. Throughout, the authors keep a moderate, pragmatic tone, free of name-brand methodology. That's a good thing, since the real focus is on basic skills and decision criteria.

    One aspect of this book is just a little confusing. It's definitely aimed at educating a new OO designer, but it doesn't lay out its educational objectives or plan very clearly.
    Read more ›
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