Praise for Understanding SOA with Web ServicesThis book does the best job of describing not only where we are in the timeline of enterprise integration efforts, but also providing strategic guidance for where we need to be. The authors have worked diligently to break down the integration problem into functional areas, and send you down the path of strategic integration utilizing XML Web Services and Service-Oriented Architecture as the vehicle of choice. You will love this book!--Daniel Edgar, Architect, Portland General ElectricE-Government needs a comprehensive guide to SOA with Web Services standards and best practices for implementation to get from the current as is to the future to be architecture. This book meets that need superbly.--Brand Niemann, Ph.D., Co-Chair, Semantic (Web Services) Interoperability Community of Practice, U.S. Federal CIO Council.There are many books on SOA available today, but Understanding SOA with Web Services stands out from the pack because of its thorough, outstanding coverage of transactions, reliability, and process. Newcomer fearlessly dive into these more advanced, yet critical, topics, and provide a depth of treatment unavailable anywhere else.--Jason Bloomberg, Senior Analyst, ZapThink LLCThis book provides a wealth of content on Web Services and SOA not found elsewhere. Although the book is technical in nature, it is surprisingly easy to read and digest. Managers who would like to keep up with the most effective technical strategies will find this book required reading.--Hari Mailvaganam, University of British Columbia, VancouverI have been teaching companies and lecturing on SOA and XML Web Services for years and sort of felt at home with these technologies. I didn t think anyone else could teach me anything more significant about either of them. This book surprised me. If a person teaching SOA and Web Services can learn something from this book, you can too. This book is a must-read for all architects, senior developers, and concerned CTOs.--Sayed Y. luminaries on the topics of Web Services, Service-Oriented Architecture, and integration. This book is sure to be a must-have for developers and architects looking to take advantage of the coming wave of standards-based, loosely coupled integration.--Ronald Schmelzer, Senior Analyst, ZapThink, LLCAuthor of XML and Web Services Unleashed (Sams, 2002)The author makes it quite clear: SOA is an organizational principle and Web Service technology is a means to realize enterprise solutions according to this. SOA is the federative concept of nature and efficient societies. The book is an excellent starting-point to discover the new world of an IT-infrastructure adjusted to efficient business strategies and processes in a global value-add network.--Johann Wagner, Senior Architect, Siemens Business Services Author of Foderative UnternehmensprozesseFinally, here s a third-generation Web services book that delivers pragmatic solutions using SOAs. Newcomer and Lomow draw from their years of real-world experience ranging from developing Web services standards to hands-on applications. Listen to them. ServicesHost and producer, IT Conversations (www itconversations.com)The definitive guide to using Service-Oriented Architecture (SOA) and Web services technologies to simplify IT infrastructure and improve business agility. Renowned experts Eric Newcomer and Greg Lomow offer practical strategies and proven best practices for every facet of SOA planning and implementation. Newcomer and Lomow pick up where Newcomer s widely read Understanding Web Services left off, showing how to fully leverage today s latest Web services standards for metadata management, security, reliable messaging, transactions, and orchestration.Along the way, they present specific approaches and solutions for a wide range of enterprise integration and development challenges, including the largest and most complex.Coverage includes Why SOA has emerged as the dominant approach to enterprise integration How and why Web services provide the ideal foundation for SOA Underlying concepts shared by all SOAs: governance, service contracts, Web services platforms, service-oriented development, and more Implementing service-level communications, discovery,
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About the Authors
In the role of Chief Technology Officer at IONA, Eric Newcomer is responsible for IONA's technology roadmap and direction as relates to standards adoption, architecture, and product design. Eric joined IONA in November 1999 as transaction architect, and most recently served as Vice President of Engineering, Web Services Integration Products. Eric has 26 years experience in the computer industry, including more than 15 years at Digital Equipment Corporation/Compaq Computer, where he held a variety of technical and management positions before receiving a corporate-level technical appointment. Eric received his BA in American Studies from Antioch College, with a minor in computer science.
In addition to Understanding Web Services, published in 2002, Eric is co-author of Principles of Transaction Processing, published in 1997 by Morgan Kaufman, and co-author of a chapter called "The Keys to the Highway" in The Future of Software, published in 1995 by MIT Press. Eric is also the author of numerous white papers and articles, co-author and editor of the Structured Transaction Definition Language specification published by X/Open (now The Open Group) in 1994, former member of the Transaction Internet Protocol working group at IETF, former member of the X/Open Distributed Transaction Processing committee that created the XA specification, former chair of the OTS RTF at OMG, and chair of the team that developed the XML Valuetype specification at OMG to map XML to CORBA. He was a charter member of the XML Protocols Working Group at W3C, where he served as an editor of the requirements document that led to SOAP 1.2. He served for nearly two years as an editor of the W3C Web Services Architecture Specification, and most recently served as co-chair and editor of the Web Services Composite Application Framework set of specifications at OASIS.
Greg Lomow, Ph.D., is a senior manager and consultant for BearingPoint, Inc. Greg has 12 years of experience as a consultant and enterprise architect working in the financial services, telecom, and federal government sectors designing business applications using service-oriented architecture, developing simulation applications using distributed object technology, and training developers in object-oriented design and programming techniques. He also worked for eight years as a product manager at Jade Simulations, Level 8 Systems, and IONA Technologies responsible for integration, web services, and middleware products. Greg co-authored C++ Frequently Asked Questions published by Addison-Wesley in October 1999 (1st ed.) and again in January 1999 (2nd ed.). He completed his Ph.D. in computer science at the University of Calgary, Canada, in 1988. Greg is an active member of the Web Services Interoperability (WS-I) Organization.
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The widely adopted and implemented core Web services standards (SOAP and WSDL) have achieved unprecedented interoperability across highly disparate software systems. As a result, new Web services standards have been proposed for extended features such as security, reliability, transactions, metadata management, and orchestration that extend Web services for use in a broad range of new applications.
The service-oriented architecture (SOA) has also become widely recognized for its important role in information technology projects. An SOA is a style of design that guides an organization during all aspects of creating and using business services (including conception, modeling, design, development, deployment, management, versioning, and retirement).
Despite some limitations (which we document), an SOA with Web services is the ideal combination of architecture and technology for consistently delivering robust, reusable services that support today's business needs and that can be easily adapted to satisfy changing business requirements.
Think about an SOA as an assembly line in a factory. It's an investment in the future operation of your business, so a significant amount of planning, design, and development may have to go into it before it starts to really pay off. The first car off a production line is more expensive than the thousandth. Similarly, the first service deployed in an SOA is more expensive than the hundredth. The major benefits of SOA arrive over time, although as we will see, it is possible to start small and incrementally build up to a full-fledged SOA.
SOA with Web services is important because it aligns information technology (IT) with business requirements and because it reduces the costs of IT systems and applications. An SOA gives you the ability to more easily integrate IT systems, provide multi-channel access to your systems, and to automate business processes.
Rather than relying entirely upon the skill and knowledge of certain specific individuals to implement business requirements in technology, SOA provides a foundation for rapidly assembling and composing new applications out of a library of reusable services that anyone can understand. When an SOA is in place and services are developed, developers can easily reuse existing services in their new applications and automated business processes.
Like any new investment in technology and infrastructure, it's important to understand the right way to do it and what you can and can't do. SOA and Web services are great, but they can't do everything. We hope that this book will help you achieve the benefits of SOA with Web services while avoiding the pitfalls.
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