Web Service Contract Design and Versioning for SOA View Larger Image | Thomas Erl, Hugo Haas
Prentice Hall, Hardcover, Published September 2008, 800 pages, ISBN 013613517X | List Price: $44.99
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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.
Table of Contents
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
About the Author
Thomas Erl is the world's top-selling SOA author and the Series Editor of the
Prentice Hall Service-Oriented Computing Series from Thomas Erl (www.soabooks.com).
His first two books, Service-Oriented Architecture: A Field Guide to Integrating
XML and Web Services and Service-Oriented Architecture: Concepts, Technology,
and Design have become international bestsellers and have been formally endorsed
by senior members of major software organizations, such as IBM, Sun, and Microsoft.
Thomas is also the founder of SOA Systems Inc. (www.soasystems.com), a company
specializing in SOA training and strategic consulting services with a vendor-agnostic
focus. Through his work with standards organizations and independent research
efforts, Thomas has made significant contributions to the SOA industry, most
notably in the areas of service-orientation and SOA methodology. Thomas has
had numerous articles and papers published on Web sites and in industry trade
magazines, and is a speaker and instructor for private and public events. To
learn more, visit www.thomaserl.com.
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