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Use SCA to Simplify the Development and Delivery of Service-Based Applications Using Service Component Architecture (SCA), enterprises can radically simplify the development and delivery of service-based applications, so they can build cost-effective systems faster and drive more business value from them. InUnderstanding SCA (Service Component Architecture), two leading experts offer the first practical, realistic, and independent guide to SCA for everyone involved in evaluating, architecting, implementing, or managing it. Drawing on extensive experience in developing both enterprise systems and SCA standards, Jim Marino and Michael Rowley show how SCA makes it easier to build systems from interconnected, heterogeneous, and widely-distributed parts. They clearly explain SCArs"s key ideas, demonstrate how it responds to the twin challenges of complexity and reuse, and show how it fits with Java EE, .NET, and SOA. Next, they illuminate every essential SCA concept, including services, components, composites, and domains, offering straightforward code examples built with the Java-based programming model for SCA. Coverage includes Objectively determining whether, where, and when to implement SCA Reducing costs and accelerating delivery by implementing SCArs"s proven architecture for software reuse Building an SCA-based foundation for sharing application resources and logic Mastering best practices for SCA development Utilizing key SCA concepts such as composition, policy, wires, and bindings Developing modular applications that are easy to integrate Configuring cross-application policies such as security and reliability Using BPEL with SCA to provide applications with long-running process capabilities Understanding SCA (Service Component Architecture)is for developers constructing solutions that follow SCA standards; architects planning and designing SCA-compliant application architectures; technical executives who want to make better strategic decisions about SCA; and software customers demanding more reliable, cost-effective, and timely solutions. Preface Chapter 1: Introducing SCA Chapter 2: Assembling and Deploying a Composite Chapter 3: Service-Based Development Using Java Chapter 4: Conversational Interactions Using Java Chapter 5: Composition Chapter 6: Policy Chapter 7: Wires Chapter 8: Bindings Chapter 9: The Domain Chapter 10: Service-Based Development Using BPEL Chapter 11: Persistence Chapter 12: The Presentation Tier

Jim Marino, Ph.D., is Principal at Metaform Systems, where he provides strategic planning, architecture assistance, and training to clients worldwide. Jim is also one of the architects of the Fabric3 SCA runtime. Prior to joining Metaform Systems, Jim was Director of Technology at BEA Systems, where he was involved with the development of Service Component Architecture from its inception.

Michael Rowley, Ph.D., is the CTO of Active Endpoints, Inc. He has been involved in the development of SCA from early in its development and has contributed to 12 of the 15 SCA specifications that were published as part of the Open Service- Oriented Architecture (OSOA) collaboration. He was also an original member of the Open Component Service Architecture (OpenCSA) steering committee, which is the OASIS steering committee that oversees the work of the various SCA technical committees. Before joining Active Endpoints, he was a Director of Technology at BEA Systems where, in addition to working on SCA, he also helped develop the BPELJ extension to BPEL and was involved in the early development of BEA’s event processing and service bus products. Michael received his Ph.D. in computer science from UCLA in 1994.

Preface	p. xix
Introducing SCA	p. 1
Assembling and Deploying a Composite	p. 41
Service-Based Development Using Java	p. 69
Conversational Interactions Using Java	p. 109
Composition	p. 131
Policy	p. 167
Wires	p. 189
Bindings	p. 203
The Domain	p. 231
Service-Based Development Using BPEL	p. 267
Persistence	p. 285
The Presentation Tier	p. 311
Index	p. 325
Table of Contents provided by Publisher. All Rights Reserved.

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Chapter 1: Understanding SCA PrefaceWhat is Service Component Architecture (SCA)? What are the key SCA concepts? How will SCA impact technology choices my organization will need to make in the near-term? How should SCA fit into my enterprise architecture? How can I make the best use of SCA in my projects?Answering these questions is fundamental to understanding SCA. The goal of this book is to help answer those questions by providing the background necessary to use SCA effectively. Who Can Benefit From This BookSCA is a technology for creating, assembling, and managing distributed applications. However, this book is not intended solely for developers. Our aim is to benefit "technologists"--developers, but also architects, analysts, managers, and anyone who has a stake implementing information systems--by connecting SCA to broader technology trends.In this book, we attempt to strike a balance between the "big picture" and the detailed coverage essential to developers. We also endeavor to achieve this balance in a way that is engaging, accurate, and complete.Both of us have been involved with SCA since its inception, when it started as an informal working group composed of individuals from IBM and BEA (where both of us worked). We have been directly involved in shaping SCA as it went through various iterations and changes. Rather than simply provide a tutorial, we have sought to explain the history and reasoning behind important decisions made during the development of SCA.Lest we be accused of operating in the "ivory tower" of technology standards, we have also attempted to be informed by practical experience. We have been key contributors to the open source Fabric3 SCA runtime. In addition, while at BEA and now in our current positions, we have had the opportunity to be involved in the development of several large-scale systems built with SCA. We have tried to reflect this experience and lessons learned throughout the book in the form of best practices and implementation advice.Finally, while we strive for completeness and accuracy, there are inevitably things a book must leave out. SCA is a vast technology that spans multiple programming languages. We have chosen to concentrate on those aspects of SCA that pertain to creating and assembling applications using Java. Although we touch on BPEL, our focus remains on Java, as the latter is a cornerstone of modern enterprise development. How to Read the BookReading a book is like listening to an album (or CD): Both are highly personal experiences. Some prefer to read thoroughly or listen from beginning to end. Others like to skip around, focusing on specific parts.Understanding SCA is designed to be read in parts but also has a structure tying the various pieces together. The first chapter, "Introducing SCA," provides an overview of SCA and how it fits into today's technology landscape. The second chapter, "Assembling and Deploying a Composite," continues the overview theme by walking through how to build an application using SCA.Chapters 3 and 4, "Service-Based Development Using Java" and "Conversational Interactions Using Java," respectively, turn to advanced SCA programming model topics. In these chapters, we detail how to design loosely-coupled services, asynchronous interactions, manage stateful services, and best practices for developing with SCA.Having explored the

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Understanding Sca Service Component Architecture

Understanding Sca Service Component Architecture

0321515080

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