This is the Safari online edition of the printed book.

The Ultimate Guide for Designing and Governing Web Service Contracts

For Web services to succeed as part of SOA, they require balanced, effective technical contracts that enable services to be evolved and repeatedly reused for years to come. Now, a team of industry experts presents the first end-to-end guide to designing and governing Web service contracts. Writing for developers, architects, governance specialists, and other IT professionals, the authors cover the following areas:

Understanding Web Service Contract Technologies

Initial chapters and ongoing supplementary content help even the most inexperienced professional get up to speed on how all of the different technologies and design considerations relate to the creation of Web service contracts. For example, a visual anatomy of a Web service contract documented from logical and physical perspectives is provided, along with a chapter dedicated to describing namespaces in plain English. The book is further equipped with numerous case study examples and many illustrations.

Fundamental and Advanced WSDL

Tutorial coverage of WSDL 1.1 and 2.0 and detailed descriptions of their differences is followed by numerous advanced WSDL topics and design techniques, including extreme loose coupling, modularization options, use of extensibility elements, asynchrony, message dispatch, service instance identification, non-SOAP HTTP binding, and WS-BPEL extensions. Also explained is how WSDL definitions are shaped by key SOA design patterns.

Fundamental and Advanced XML Schema

XML Schema basics are covered within the context of Web services and SOA, after which advanced XML Schema chapters delve into a variety of specialized message design considerations and techniques, including the use of wildcards, reusability of schemas and schema fragments, type inheritance and composition, CRUD-style message design, and combining industry and custom schemas.

Fundamental and Advanced WS-Policy

Topics, such as Policy Expression Structure, Composite Policies, Operator Composition Rules, and Policy Attachment establish a foundation upon which more advanced topics, such as policy reusability and centralization, nested, parameterized, and ignorable assertions are covered, along with an exploration of creating concurrent policy-enabled contracts and designing custom policy assertions and vocabularies.

Fundamental Message Design with SOAP
A broad range of message design-related topics are covered, including SOAP message structures, SOAP nodes and roles, SOAP faults, designing custom SOAP headers and working with industry-standard SOAP headers.

Advanced Message Design with WS-Addressing

The art of message design is taken to a new level with in-depth descriptions of WS-Addressing endpoint references (EPRs) and MAP headers and an exploration of how they are applied via SOA design patterns. Also covered are WSDL binding considerations, related MEP rules, WS-Addressing policy assertions, and detailed coverage of how WS-Addressing relates to SOAP Action values.

Advanced Message Design with MTOM, and SwA

Developing SOAP messages capable of transporting large documents or binary content is explored with a documentation of the MTOM packaging and serialization framework (including MTOM-related policy assertions), together with the SOAP with Attachments (SwA) standard and the related WS-I Attachments Profile.

Versioning Techniques and Strategies

Fundamental versioning theory starts off a series of chapters that dive into a variety of versioning techniques based on proven SOA design patterns including backward and forward compatibility, version identification strategies, service termination, policy versioning, validation by projection, concurrency control, partial understanding, and versioning with and without wildcards.

Web Service Contracts and SOA

The constant focus of this book is on the design and versioning of Web service contracts in support of SOA and service-orientation. Relevant SOA design principles and design patterns are periodically discussed to demonstrate how specific Web service technologies can be applied and further optimized. Furthermore, several of the advanced chapters provide expert techniques for designing Web service contracts while taking SOA governance considerations into account.

About the Web Sites

www.soabooks.com supplements this book with a variety of resources, including a diagram symbol legend, glossary, supplementary articles, and source code available for download.

www.soaspecs.com provides further support by establishing a descriptive portal to XML and Web services specifications referenced in all of Erl’s Service-Oriented Architecture books.

Foreword

Preface

Chapter 1: Introduction

Chapter 2: Case Study Background

Part I: Fundamental Service Contract Design

Chapter 3: SOA Fundamentals and Web Service Contracts

Chapter 4: Anatomy of a Web Service Contract

Chapter 5: A Plain English Guide to Namespaces

Chapter 6: Fundamental XML Schema: Types and Message Structure Basics

Chapter 7: Fundamental WSDL Part I: Abstract Description Design

Chapter 8: Fundamental WSDL Part II: Concrete Description Design

Chapter 9: Fundamental WSDL 2.0: New Features, and Design Options

Chapter 10: Fundamental WS-Policy: Expression, Assertion, and Attachment

Chapter 11: Fundamental Message Design: SOAP Envelope Structure, and Header Block Processing

Part II: Advanced Service Contract Design

Chapter 12: Advanced XML Schema Part I: Message Flexibility, and Type Inheritance and Composition

Chapter 13: Advanced XML Schema Part II: Reusability, Derived Types, and Relational Design

Chapter 14: Advanced WSDL Part I: Modularization, Extensibility, MEPs, and Asynchrony

Chapter 15: Advanced WSDL Part II: Message Dispatch, Service Instance Identification, and Non-SOAP HTTP Binding

Chapter 16: Advanced WS-Policy Part I: Policy Centralization and Nested, Parameterized, and Ignorable Assertions

Chapter 17: Advanced WS-Policy Part II: Custom Policy Assertion Design, Runtime Representation, and Compatibility

Chapter 18: Advanced Message Design Part I: WS-Addressing Vocabularies

Chapter 19: Advanced Message Design Part II: WS-Addressing Rules and Design Techniques

Part III: Service Contract Versioning

Chapter 20: Versioning Fundamentals

Chapter 21: Versioning WSDL Definitions

Chapter 22: Versioning Message Schemas

Chapter 23: Advanced Versioning

Part IV: Appendices

Appendix A: Case Study Conclusion

Appendix B: A Comparison of Web Services and REST Services

Appendix C: How Technology Standards are Developed

Appendix D: Alphabetical Pseudo Schema Reference

Appendix E: SOA Design Patterns Related to This Book

Amazon.com® Reader Reviews (Ranked by Helpfulness)

Average Amazon.com® Rating:  Based on 9 Ratings

Finally, an SOA book focused on the contract - 2009-04-08
Reviewer Rating:
The "Web Service Contract Design & Versioning for SOA" text is yet another great book from the Thomas Erl SOA series. What's great about this book is that it focuses exclusively on the contract part of the service; too often, even while espousing the benefits of top-down service design, SOA literature treats contract design as a side-note. To truly be successful with SOA, the contract must be designed, developed, and governed independently of the service logic behind it. This book is filled with a wealth of information and examples of how to meet those goals; any serious SOA effort will benefit tremendously by the concepts presented in this book.

Great reference for contract design - 2009-02-20
Reviewer Rating:
Building quality contracts using Web Services via a top down approach can be scary for the uninitiated. This book provides a vendor-agnostic discussion and reference for service architects in the areas of schema, wsdl, policy and governance that is unmatched in my research and reading. Highly recommend this to understand the practical implementation of a top down approach.

A must have in a serious library - 2009-06-10
Reviewer Rating:
Someone once said: "he has an intelligent bookshelf"... Well, this book is not for a booshelf. It is for reading and having practical advantage in the confusing world of SOA.

Best Web Service Contract Design - 2009-02-10
Reviewer Rating:
If you want to gain knowledge of Web Service Contract Design, this is the book for. The book has minor grammatical error, diagrams are not color, and no book mark. Otherwise, it is the best book. Relevant contents in sample are in red color making it easy to spot.

College-level collections strong in software engineering will find it a fine survey of web service contracts - 2009-02-09
Reviewer Rating:
Advanced computer libraries will find Web Service Contract Design & Visioning for SOA a fine compendium for WS design and SOA, allowing both beginners and experts insights into the SOA Strategy and process. College-level collections strong in software engineering will find it a fine survey of web service contracts that enable services to be reused and tweaked for years to come. From versioning techniques to basic XML design and message design with SOAP, this is a detailed, in-depth reference highly recommended for any college-level collection catering to software engineers.

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