Understanding SCA (Service Component Architecture) [NOOK Book]

Overview

Use SCA to Simplify the Development and Delivery of Service-Based Applications

 

Service Component Architecture (SCA) is a new programming model that enables developers to build distributed applications more efficiently and effectively than previous technologies. In Understanding SCA (Service Component Architecture), two leading experts offer the first complete and independent guide to SCA. Drawing on extensive experience both developing the SCA standards and implementing ...

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Understanding SCA (Service Component Architecture)

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Overview

Use SCA to Simplify the Development and Delivery of Service-Based Applications

 

Service Component Architecture (SCA) is a new programming model that enables developers to build distributed applications more efficiently and effectively than previous technologies. In Understanding SCA (Service Component Architecture), two leading experts offer the first complete and independent guide to SCA. Drawing on extensive experience both developing the SCA standards and implementing large-scale SCA applications, Jim Marino and Michael Rowley provide an insider's perspective for developers and technical managers tasked with architecting and implementing enterprise systems. Rather than simply providing a technology overview, the authors draw on their practical experiences with SCA, explaining

  • The full history behind SCA
  • How SCA fits with other enterprise technologies such as JEE, .NET, Web Services, and BPEL
  • All the major SCA concepts including composition, policy, wires, and bindings
  • Best practices for designing SCA applications
  • Using SCA with Web Services, Message-Oriented Middleware, BPEL, JPA, and Servlets

Understanding SCA (Service Component Architecture) provides the background necessary to make informed decisions about when and how to best use SCA to build enterprise applications.

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Editorial Reviews

From the Publisher

Praise for Understanding SCA (Service Component Architecture)

“Jim Marino and Michael Rowley have been involved with SCA from the start and know it as well as anyone. They have great hands-on experience with the Fabric3 open source SCA project. This book also tackles the subject and its broad issues head on, and in addition to the clear and concise technical descriptions of SCA, they provide excellent sidebar perspectives on Java, Java EE, Web services, and SCA’s relationship to them all.”

–Eric Newcomer, Progress Software, Coauthor of Understanding SOA with Web Services, and Author of Understanding Web Services

“It was really worthwhile reading this book. It not only introduces a powerful technology, but also provides comprehensive coverage of supporting technologies. The authors have paid plenty of attention to practical issues including performance and thoroughly understand the ways that SCA can leverage state-of-the-art technologies such as JPA.”

–Tim Holloway, Forum Moderator, The JavaRanch

“SCA is a nice, conceptually and technically sound advanced component framework. This book enables easy access to this exciting technology for software developers.”

–Dr. Steffen Becker

Understanding SCA (Service Component Architecture) delivers the details for how to effectively use SCA leveraging open source tools such as Fabric3.”

–Dave Hendricksen, Software Architect

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Product Details

  • ISBN-13: 9780321617903
  • Publisher: Pearson Education
  • Publication date: 7/13/2009
  • Series: Independent Technology Guides
  • Sold by: Barnes & Noble
  • Format: eBook
  • Edition number: 1
  • Pages: 360
  • File size: 11 MB
  • Note: This product may take a few minutes to download.

Meet the Author

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.

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Table of Contents

Preface     xix

Chapter 1: Introducing SCA     1

Chapter 2: Assembling and Deploying a Composite     41

Chapter 3: Service-Based Development Using Java     69

Chapter 4: Conversational Interactions Using Java     109

Chapter 5: Composition     131

Chapter 6: Policy     167

Chapter 7: Wires     189

Chapter 8: Bindings     203

Chapter 9: The Domain     231

Chapter 10: Service-Based Development Using BPEL     267

Chapter 11: Persistence     285

Chapter 12: The Presentation Tier     311

Index     325

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Preface

Preface

What 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 Book

SCA 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 opensource 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 Book

Reading 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 SCA programming model in depth, Chapters 5–9 cover the main SCA concepts: composition, policy, wires, bindings, and the domain. In these chapters, we explain how to develop modular applications, use transactions, configure cross-application policies such as security and reliability, integrate with external systems, deploy applications, and structure corporate architectures using SCA.

Chapter 10, "Service-Based Development Using BPEL," demonstrates how to use BPEL with SCA to provide applications with long-running process capabilities.

The final two chapters round out application development with SCA by focusing on the data and presentation tiers. Chapter 11, "Persistence," details how to use Java Persistence API (JPA) with SCA to read and write data from a database. Chapter 12, "The Presentation Tier," demonstrates how to integrate web applications, in particular servlets and JSPs, with SCA services.


© Copyright Pearson Education. All rights reserved.

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Customer Reviews

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  • Anonymous

    Posted April 3, 2014

    Riverspark

    Thank you she meows dipping her head in thanks and respect.

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  • Anonymous

    Posted April 3, 2014

    Stormsta

    Yeep

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  • Anonymous

    Posted April 3, 2014

    Darktail

    May i join?

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  • Posted July 27, 2009

    more from this reviewer

    simpler to code

    The basic aim of the book is well described in its first chapter. It tries to define a standard for writing distributed systems that is analogous to object oriented ideas for writing a single system. SCA builds on its predecessors; notably CORBA and DCOM from the 90s, and Java EE and .NET from the noughties. At this point, if you are a EE or .NET person, you probably agree that CORBA and DCOM were flawed. But you would probably disagree about EE or .NET itself.

    The book argues that those two, while better than the 90s, also have taken on increasing complexity. A multitude of standards like JDBC, JPA, JMS and EJB have flowed in the java world. While the .NET environment also have equivalents to address similar needs.

    Interestingly as a point of sociology, SCA also is deliberately different from how CORBA and EE arose. Those were complex standards put together by official committees. SCA was designed to change quicker, by being at its core somewhat ad hoc industry collaborations.

    If you are a java programmer, the flavour of the book's technical discussion is like an extended foray into the use of java interfaces. Just an analogy. But the explanation of making components that can then be used in services makes this a good one for understanding.

    Also, on pages 72-3 is a very succinct explanation of why EJBs never really took off, due to the performance penalties for remote calls and the complexity of the EJB code. If only the EJB books from 10 years ago had told us!

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