Thomas Erl is the world’s top-selling SOA author and Series Editor of the Prentice Hall Service-Oriented Computing Series from Thomas Erl (www.soabooks.com). With over 100,000 copies in print worldwide, his books have become international bestsellers and have been formally endorsed by senior members of major software organizations, such as IBM, Microsoft, Oracle, BEA, Sun, Intel, SAP, CISCO, and HP. His most recent titles - SOA Design Patterns and Web Service Contract Design and Versioning for SOA - were co-authored with a series of industry experts and follow his first three books Service-Oriented Architecture: A Field Guide to Integrating XML and Web Services, Service-Oriented Architecture: Concepts, Technology, and Design, and SOA Principles of Service Design. Thomas is currently working with over 20 authors on a number of upcoming titles, including SOA Governance, SOA with .NET, SOA with Java, ESB Architecture for SOA, and SOA with REST. He is also overseeing the SOAPatterns.org initiative, a community site dedicated to the on-going development of SOA patterns. Thomas is the founder of SOA Systems Inc. (www.soasystems.com), a company specializing in vendor-neutral SOA consulting and training services. He is also the founder of the internationally recognized SOA Certified Professional program (www.soacp.com and www.soaschool.com). Thomas is a speaker and instructor for private and public events and is regularly invited to Gartner summits. He has delivered many workshops and keynote speeches, and is on the program committee for the International SOA Symposium. Articles and interviews by Thomas have been published in numerous publications, including SOA World Magazine, The Wall Street Journal and CIO Magazine. For more information, visit www.thomaserl.com.
It's always good to get an idea of the big picture before diving into the
details of any technology-centric topic. For this reason, we'll take the time
to briefly mention the overarching goals and benefits associated with
service-oriented computing as they relate to Web Service contract design.
Because these goals are strategic in nature, they are focused on long-term
benefit - a consideration that ties into both the design and governance of
services and their contracts. An understanding of these long-term benefits
helps provide a strategic context for many of the suggested techniques and
practices in this guide.
Here's the basic list of the goals and benefits of service-oriented
computing:
Increased Intrinsic Interoperability Increased Federation Increased Vendor
Dive... (more)
One of the fundamental goals when designing service-oriented solutions is to
attain a reduced degree of coupling between services, thereby increasing the
freedom and flexibility with which services can be individually evolved.
Achieving the right level of coupling "looseness" is most often considered a
design issue that revolves around the service contract and the consumer
programs that ... (more)
Like data normalization, the Service Normalization pattern is intent on
reducing redundancy and waste in order to avoid the governance burden
associated with having to maintain and synchronize similar or duplicate
bodies of service logic."
You can see it introduces the Pattern on our publisher page.
When designing data architectures, you can easily end up with different
databases or even... (more)
Should a service only be considered a service if it's reusable? The answer to
this question, as asserted by this pattern, is a firm "no." While agnostic
services (services providing multi-purpose logic with reuse potential, as per
the Agnostic Context pattern), receive the most attention during service
modeling and design phases, it can often be short-sighted to focus only on
agnostic se... (more)
With the unwavering prominence of service-oriented architecture (SOA) there
is an increasing interest in understanding what exactly it means for
something to be considered "service-oriented." Thomas Erl recently completed
a lengthy research project for SOA Systems Inc. into the origins of SOA and
the current state of service-orientation among all primary SOA technology
platforms. This bo... (more)
Thomas Erl is the world’s top-selling SOA author and Series Editor of the Prentice Hall Service-Oriented Computing Series from Thomas Erl (www.soabooks.com). With over 100,000 copies in print worldwide, his books have become international bestsellers and have been formally endorsed by senior members of major software organizations, such as IBM, Microsoft, Oracle, BEA, Sun, Intel, SAP, CISCO, and HP. His most recent titles - SOA Design Patterns and Web Service Contract Design and Versioning for SOA - were co-authored with a series of industry experts and follow his first three books Service-Oriented Architecture: A Field Guide to Integrating XML and Web Services, Service-Oriented Architecture: Concepts, Technology, and Design, and SOA Principles of Service Design. Thomas is currently working with over 20 authors on a number of upcoming titles, including SOA Governance, SOA with .NET, SOA with Java, ESB Architecture for SOA, and SOA with REST. He is also overseeing the SOAPatterns.org initiative, a community site dedicated to the on-going development of SOA patterns. Thomas is the founder of SOA Systems Inc. (www.soasystems.com), a company specializing in vendor-neutral SOA consulting and training services. He is also the founder of the internationally recognized SOA Certified Professional program (www.soacp.com and www.soaschool.com). Thomas is a speaker and instructor for private and public events and is regularly invited to Gartner summits. He has delivered many workshops and keynote speeches, and is on the program committee for the International SOA Symposium. Articles and interviews by Thomas have been published in numerous publications, including SOA World Magazine, The Wall Street Journal and CIO Magazine. For more information, visit www.thomaserl.com.
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