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
Über den Autor Thomas Erl
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Thomas Erl is a best-selling IT author and series editor of the Pearson Digital Enterprise Series from Thomas Erl. Thomas has authored and co-authored 15 books published by Pearson Education and Prentice Hall dedicated to contemporary business technology and practices. You can find Thomas on the Thomas Erl YouTube channel (youtube.com/@terl). He is also the host of the Real Digital Transformation podcast series (available via Spotify, Apple, Google Podcasts, and most other platforms) and also publishes the weekly LinkedIn newsletter The Digital Enterprise. Over 100 articles and interviews by Thomas have been published in numerous publications, including CEO World, The Wall Street Journal, Forbes, and CIO Magazine. Thomas has also toured over 20 countries as a keynote speaker for various conferences and events. At Arcitura Education (www.arcitura.com), Thomas leads the development of curricula for internationally recognized, vendor-neutral training and accreditation programs. Arcitura's portfolio currently consists of over 100 courses, over 100 Pearson VUE exams, and over 40 certification tracks, covering topics such as Cloud Computing Architecture, Security, and Governance, as well as Digital Transformation, Robotic Process Automation (RPA), DevOps, Blockchain, IoT, Containerization, Machine Learning, Artificial Intelligence (AI), Cybersecurity, Service-Oriented Architecture (SOA), and Big Data Analytics. Thomas is also the founder and senior advisor at Transformative Digital Solutions (www.transformative.digital) and a freelance LinkedIn instructor and courseware author. www.thomaserl.com Eric Barceló Monroy is an IT professional with extensive experience in IT strategic planning, operational and administrative process reengineering, system implementation project management, and IT operations. He has a proven track record of implementing systems that exceed user expectations while reducing costs and improving response times. He has held various high-level positions in both the private and public sectors, including Director of Information Technology at Farmacéuticos MAYPO, a pharmaceutical distributor; Vice-president of Telecommunications and Technology Operations at iExplore, an internet-based adventure travel agency; and Director of Information Technology and Telecommunications at the Ministry of Education in Tabasco, Mexico, where he oversaw the implementation of telecommunication networks among schools and develops and delivers computer literacy training programs for faculty. Additionally, he is a partner and Technical Consulting Director at EGN, a cloud technology consulting and training firm, where he provides IT consultancy on state of-theart topics like Big Data, Cloud Computing, Virtualization, Advanced Networking, and Strategic IT Management. Eric is a Certified Cloud Computing Technology Professional, Certified Cloud Virtualization Specialist, and Certified Cloud Architect, among others. He is also a VMware Certified Professional, Red Hat Certified System Administrator, Red Hat Certified Engineer, and Certified Amazon Web Services Solutions Architect.
