The Prentice Hall Service-Oriented Computing Series from Thomas Erl
SOA Principles of Service Design
SOA Principles of Service Design
by Thomas Erl
Prentice Hall/PearsonPTR
ISBN: 0132344823
Hardcover, Full-Color, 573 pages
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The key to succeeding with service-oriented architecture (SOA) is in comprehending the meaning and significance of its most fundamental building block: the service. It is through an understanding of service design that truly "service-oriented" solution logic can be created in support of achieving the strategic goals associated with SOA and service-oriented computing.

Formally endorsed by senior members of Intel, Microsoft, Oracle, IBM, BEA, Sun, Intel, HP, and SAP, this acclaimed book provides a thorough exploration of service engineering as it guides you through a comprehensive, insightful, and visually rich exploration of the service-orientation design paradigm, revealing exactly how services should and should not be designed for real-world SOA.

This book's coverage includes:
Over 240 full-color illustrations
A concise introduction to SOA and service-oriented computing concepts and benefits
A thorough exploration of the service-orientation design paradigm as represented by eight specific design principles
A comparison of service-oriented and object-oriented concepts and principles and a clear definition of what qualifies as "service-oriented" logic
Detailed coverage of four different forms of service-related design granularity
An exhaustive examination of service contracts, with an emphasis on standardization, abstraction, and the utilization of WS-Policy, XML Schema, and WSDL definitions
A comprehensive study of various forms of service-related coupling with an emphasis on the requirements to attaining a suitable level of loose coupling.
An inside look into how commercial design approaches are incorporated to achieve truly agnostic and reusable service logic
Techniques for maximizing service reliability, scalability, and performance by instilling high levels of autonomy and emphasizing stateless design
Approaches for positioning services as highly discoverable and interpretable enterprise resources
Unprecedented coverage of how to design services for participation in complex compositions
The definition of concrete links between each design principle and the strategic goals and benefits of SOA and service-oriented computing
Numerous cross-references to key design patterns documented separately in SOA: Design Patterns


Table of Contents

Below is a summarized TOC. For a more detailed look at the topics covered by this book, view the complete TOC.

Preface

Chapter 1: Introduction
  1.1 Objectives of this Book
  1.2 Who this Book is For
  1.3 What this Book Does Not Cover
  1.4 How this Book is Organized
  1.5 Symbols, Figures, and Style Conventions
  1.6 Additional Information

Chapter 2: Case Study
  2.1 How Case Study Examples are Used
  2.2 Case Study Background: Cutit Saws Ltd.

Chapter 3: Service-Oriented Computing and SOA
  3.1 Design Fundamentals
  3.2 Introduction to Service-Oriented Computing
  3.3 Goals and Benefits of Service-Oriented Computing
  3.4 Case Study Background

Chapter 4: Service-Orientation
  4.1 Introduction to Service-Orientation
  4.2 Problems Solved by Service-Orientation
  4.3 Challenges Introduced by Service-Orientation
  4.4 Additional Considerations
  4.5 Effects of Service-Orientation on the Enterprise
  4.6 Origins and Influences of Service-Orientation
  4.7 Case Study Background

Chapter 5: Understanding Design Principles
  5.1 Using Design Principles
  5.2 Principle Profiles
  5.3 Design Pattern References
  5.4 Principles that Implement vs. Principles that Regulate
  5.5 Principles and Service Implementation Mediums
  5.6 Principles and Design Granularity
  5.7 Case Study Background

Chapter 6: Service Contracts (Standardization and Design)
  6.1 Contracts Explained
  6.2 Profiling this Principle
  6.3 Types of Service Contract Standardization
  6.4 Contracts and Service Design
  6.5 Risks Associated with Service Contract Design
  6.6 More About Service Contracts
  6.7 Case Study Example

Chapter 7: Service Coupling (Intra-Service and Consumer Dependencies)
  7.1 Coupling Explained
  7.2 Profiling this Principle
  7.3 Service Contract Coupling Types
  7.4 Service Consumer Coupling Types
  7.5 Service Loose Coupling and Service Design
  7.6 Risks Associated with Service Loose Coupling
  7.7 Case Study Example

Chapter 8: Service Abstraction (Information Hiding and Meta Abstraction Types)
  8.1 Abstraction Explained
  8.2 Profiling this Principle
  8.3 Types of Meta Abstraction
  8.4 Measuring Service Abstraction
  8.5 Service Abstraction and Service Design
  8.6 Risks Associated with Service Abstraction
  8.7 Case Study Example

Chapter 9: Service Reusability (Commercial and Agnostic Design)
  9.1 Reuse Explained
  9.2 Profiling this Principle
  9.3 Measuring Service Reusability and Applying Commercial Design
  9.4 Service Reuse in SOA
  9.5 Standardized Service Reuse and Logic Centralization
  9.6 Service Reusability and Service Design
  9.7 Risks Associated with Service Reusability and Commercial Design
  9.8 Case Study Example

Chapter 10: Service Autonomy (Processing Boundaries and Control)
  10.1 Autonomy Explained
  10.2 Profiling this Principle
  10.3 Types of Service Autonomy
  10.4 Measuring Service Autonomy
  10.5 Autonomy and Service Design
  10.6 Risks Associated with Service Autonomy
  10.7 Case Study Example

Chapter 11: Service Statelessness (State Deferral and Stateless Design)
  11.1 State Management Explained
  11.2 Profiling this Principle
  11.3 Types of State
  11.4 Measuring Service Statelessness
  11.5 Statelessness and Service Design
  11.6 Risks Associated with Service Statelessness
  11.7 Case Study Example

Chapter 12: Service Discoverability (Interpretability and Communication)
  12.1 Discoverability Explained
  12.2 Profiling this Principle
  12.3 Types of Discovery and Discoverability Meta Information
  12.4 Measuring Service Discoverability
  12.5 Discoverability and Service Design
  12.6 Risks Associated with Service Discoverability
  12.7 Case Study Example

Chapter 13: Service Composability (Composition Member Design and Complex Compositions)
  13.1 Composition Explained
  13.2 Profiling this Principle
  13.3 Composition Roles, Models, and Service Activities
  13.4 The Complex Service Composition
  13.5 Measuring Service Composability and Composition Effectiveness Potential
  13.6 Composition and Service Design
  13.7 Risks Associated with Service Composition
  13.8 Case Study Example

Chapter 14: Service-Orientation and Object-Orientation: A Comparison of Principles and Concepts
  14.1 A Tale of Two Design Paradigms
  14.2 A Comparison of Goals
  14.3 A Comparison of Fundamental Concepts
  14.4 A Comparison of Design Principles
  14.5 Guidelines for Designing Service-Oriented Classes

Chapter 15: Supporting Practices
  15.1 Service Profiles
  15.2 Vocabularies
  15.3 Organizational Roles

Chapter 16: Mapping Principles to Strategic Goals
  16.1 Principles that Increase Intrinsic Interoperability
  16.2 Principles that Increase Federation

Appendix A – Case Study Conclusion

Appendix B – Process Descriptions
  B.1 Delivery Processes
  B.2 Service-Oriented Analysis Process
  B.3 Service Modeling Process
  B.4 Service-Oriented Design Processes

Appendix C – Principles and Patterns Cross-Reference

Additional Resources
About the Author
About the Photographs
Index
Podcasts About This Book

  Strategic Goals of Service-Oriented Computing
        Listen (27:51)

  Service-Orientation Design Principles - Part 1
        Listen (23:52)

  Service-Orientation Design Principles - Part 2
        Listen (17:41)


Praise For This Book

"An absolute pleasure to read…the best SOA book I've read. A book I would recommend to all of my colleagues; it provides much insight to the topics often overlooked by most books in this genre…the visuals were fantastic."
- Brandon Bohling, SOA Architecture and Strategy, Intel Corporation

"I recommend this book to any SOA practitioner who wishes to empower themselves in making service design real…gives readers the 360º view into service design [and] gives SOA practitioners the depth and understanding needed into the principles of SOA to assist in the design of a mature and successful SOA program."
- Stephen G. Bennett, Americas SOA Practice Lead, BEA Systems

"There are few references for SOA that give you the nuts and bolts and this one is at the top of the list. Well written and valuable as a reference book to any SOA practitioner."
- Dr. Mohamad Afshar, Director of Product Management, Oracle Fusion Middleware, Oracle Corporation

"A very clear discussion of the subject matter. Provides a good structure that facilitates understanding and readily highlights key points.
- Kareem Yusuf, Director of SOA Strategy and Planning, IBM Software Group

"This book does a great job laying out benefits, key ideas and design principles behind successfully adopting service-oriented computing. At the same time, the book openly addresses challenges, risks and trade-offs that are in the way of adopting SOA in the real-world today. It moves away from ivory-tower views of service orientation, but still lays out a strong vision for SOA and outlines the changes necessary to realize the full potential."
- Christoph Schittko, Senior Architect, Microsoft

"This book could be described as an encyclopedia of service design – Erl leaves nothing to chance. Indispensable."
- Steve Birkel, Chief IT Technical Architect, Intel Corp.

"I liked this book. It contains extremely important material for those who need to design services."
- Farzin Yashar, IBM SOA Advanced Technologies

"Thomas Erl's books are always densely filled with information that's well structured. This book is especially insightful for Enterprise Architects because it provide s great context and practical examples. Part 1 of the book alone is worth getting the book for."
- Markus Zirn, Senior Director, Product Management, Oracle Fusion Middleware, Oracle Corporation

"This book is a milestone in SOA literature. For the first time we are provided with a practical guide on defining service characteristics and service design principles for SOA from a vendor-agnostic viewpoint. It's a great reference for SOA discovery, adoptions, and implementation projects."
- Canyang Kevin Liu, Principal Enterprise Architect,
SAP Americas, Inc.


"There are very few who understand SOA like Thomas Erl does! The principle centric description of service orientation from Thomas canonizes the underpinnings of this important paradigm shift in creating agile and reusable software capabilities. The principles, so eloquently explained, leave little room for any ambiguity attached to the greater purpose of SOA. Most organizations today are creating services in a bottoms-up approach, realizing composition and reuse organically. The time is ripe for a book like this that prepares architects for a principle centric approach to SOA."
- Hanu Kommalapati, Architect, Microsoft Corporation

"If you are going to be designing, developing, or implementing SOA, this is a must have book."
- Jason "AJ" Comfort Sr., Booz Allen Hamilton

"This book strikes a healthy balance between theory and practice. It is a perfect complement to the SOA series by the author."
—Prakash Narayan, Sun Microsystems

"An excellent book for anyone who wants to understand service-orientation and the principles involved in designing services…a clear, concise and articulate exploration of the eight design principles involved in analyzing, designing, implementing, and maintaining services…"
- Anish Karmarkar, Oracle Corporation

"Very well written, succinct, and easy to understand."
- Raj Balasubramanian, IBM Software Group

"A thorough examination of the considerations of service design. Both seasoned SOA practitioners and those endeavoring to realize services can benefit from reading this book."
- Bill Draven, Enterprise Architect, Intel Corporation

"I am very impressed. Comprehensive. Educative. This book helped me to step back and look at the SOA principles from broader perspective. I'd say this is a must-read book for SOA stakeholders."
- Radovan Janecek, Director R&D, SOA Center, Hewlett-Packard

"A comprehensive exploration of the issues of service design which has the potential to become the definitive work in this area."
- James Pasley, Chief Technology Officer, Cape Clear Software

"SOA projects are most successful when they are based on a solid technical foundation. Well accepted and established design principles are part of this foundation. This book takes a very structured approach at defining the core design principles for SOA, thus allowing the reader to immediately applying them to a project. Each principle is formally introduced and explained, and examples are given for how to apply it to a real design problem. A ‘must read' for any architect, designer or developer of service oriented solutions".
- Andre Tost, Senior Technical Staff Member, IBM Software Group

"Outstanding SOA literature uniquely focused on the fundamental services design with thorough and in-depth study on all practical aspects from design principles to methodologies. This book provides a systematic approach for SOA adoption essential for both IT management and professionals."
- Robin Chen, PhD, Google, Inc.

"An excellent addition to any SOA library; it covers a wide range of issues in enough detail to be a valuable asset to anyone considering designing or using SOA based technologies."
- Mark Little, Director of Standards, Red Hat

"Very valuable guidance for understanding and applying SOA service design principles with concrete examples. A must read for the practitioner of SOA service design."
- Umit Yalcinalp, PhD, Standards Architect, SAP

"This book communicates complex concepts in a clear and concise manner. Examples and illustrations are used very effectively."
- Darryl Hogan, Senior Architect, Microsoft

"This book really does an excellent job of explaining the principles underpinning the value of SOA…Erl goes to great length to explain and give examples of each of the 8 principles that will significantly increase the readers ability to drive an SOA service design that benefits both business and IT."
- Robert Laird, IT Architect, IBM EAI/SOA Advanced Technologies Group

"A work of genius…Offers the most comprehensive and thorough explanation on the principles of service design and what it means to be ‘service oriented.'

"Erl's treatment of the complex world of service oriented architecture is pragmatic, inclusive of real world situations and offers readers ways to communicate these ideas through illustrations and well formulated processes."
- David Michalowicz, MITRE Corporation

"This is the book for the large organization trying to rationalize its IT assets and establish an agile platform for the future. By highlighting risk and rewards, Thomas Erl brings clarity to how Service Orientation can be applied to ensure a responsive IT organization. This book finally brings software engineering principles to address the real world development challenges being faced.

To effectively serve the business, let alone embrace SOA, everyone involved should be familiar with the concepts investigated here. Thomas Erl thoroughly clarifies the nuances and defines the practice of service design.

We expect that this will become a classic text in software engineering, corporate training and colleges."
- Cory Isaacson, President, Rogue Wave Software
and Ravi Palepu, SOA Author and Speaker


"Thomas Erl does a great job…an easy read."
- Michael H. Sor, Booz Allen Hamilton

"…a must read for SOA Architects to develop a firm foundation and understanding of the principles (and trade-offs) that make up a good SOA service.

After reading this book, it finally ‘clicked' as to why a properly designed SOA system is different (and better) than a system based on previous enterprise architectures."
- Fred Ingham, Platinum Solutions Inc.

"Lays a tremendous foundation for business and technical workers to come to common terms and expectations…incredibly enlightening to see the details associated with achieving the SOA vision."
- Wayne P. Ariola, Vice President of Strategy, Parasoft

"[Erl does] and excellent job of addressing the breadth of [his] audience to present to those new to SOA and weaved in enough detail to assist those who are already actively involved in SOA development."
- R. Perry Smith, Application Program Manager, EDS/OnStar

"It is easy to miss the big picture of what SOA means for the design of larger scale systems amidst the details of WS technologies. Erl helps provide a broader perspective, surveying the landscape from a design standpoint."
- Jim Clune, Chief Architect, Parasoft

"Lays a firm foundation for the underlying principles of good service design. Cuts through the hype and provides a cogent resource for improving architectural judgment on SOA projects."
- Jim Murphy, Vice President of Product Management, Mindreef, Inc.

"The first book to concisely, gradually and comprehensively explain how to apply SOA principles into enterprise-level software design. It is an excellent book."
- Robin G. Qiu, Ph.D., Division of Engineering and Information Science, Pennsylvania State University

"I really think that this is a very useful book that a lot of people really need out there in the industry."
- Dr. Arnaud Simon, Principal Software Engineer, Red Hat

"…indispensable companion to designing and implementing a service-oriented architecture. It condenses all information necessary to design services and is the most relevant source I know if in the field."

"[This book is] not only helpful, but fundamental to successfully designing an SOA."
- Phillipp Offermann, Research Analyst, University of Berlin

"Service-Oriented Architecture is an important topic in IT today. Its vast scope could span an organization's enterprise. Designing it properly is a major undertaking. This book provides timely, expert and comprehensive discussions on the principles of service design. Thomas has a keen sense in identifying the subtle points of various subjects and explains them in an easy-to-understand way. The book is a valuable resource for IT professionals working in SOA."
- Peter H. Chang, PhD, Associate Professor of Information Systems, Lawrence Technological University
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