Description

This book demonstrates service-oriented architecture (SOA) as a concrete discipline rather than a hopeful collection of cloud charts. Built upon the author's firsthand experience rolling out a SOA at a major corporation, SOA in Practice explains how SOA can simplify the creation and maintenance of large-scale applications. Whether your project involves a large set of Web Services-based components, or connects legacy applications to modern business processes, this book clarifies how -- and whether -- SOA fits your needs.

SOA has been a vision for years. This book brings it down to earth by describing the real-world problems of implementing and running a SOA in practice. After defining SOA's many facets, examining typical use patterns, and exploring how loose coupling helps build stronger applications, SOA in Practice presents a framework to help you determine when to take advantage of SOA. In this book you will:

• Focus squarely on real deployment and technology, not just standards maps
• Examine business problems to determine which ones fit a SOA approach before plastering a SOA solution on top of them
• Find clear paths for building solutions without getting trapped in the mire of changing web services details
• Gain the experience of a systems analyst intimately involved with SOA

Table of Contents

Preface

1. Motivation

      1.1 Characteristics of Large Distributed Systems

      1.2 The Tale of the Magic Bus

      1.3 What We Can Learn from the Tale of the Magic Bus

      1.4 History of SOA

      1.5 SOA in Five Slides

2. SOA

      2.1 Definitions of SOA

      2.2 SOA Drivers

      2.3 SOA Concepts

      2.4 SOA Ingredients

      2.5 SOA Is Not a Silver Bullet

      2.6 SOA Is Not a Specific Technology

      2.7 SOA Versus Distributed Objects

      2.8 SOA Terminology

      2.9 Summary

3. Services

      3.1 Services

      3.2 Interfaces and Contracts

      3.3 Additional Service Attributes

      3.4 Summary

4. Loose Coupling

      4.1 The Need for Fault Tolerance

      4.2 Forms of Loose Coupling

      4.3 Dealing with Loose Coupling

      4.4 Summary

5. The Enterprise Service Bus

      5.1 ESB Responsibilities

      5.2 Heterogeneous ESBs

      5.3 ESB Differences

      5.4 Value-Added ESB Services

      5.5 Summary

6. Service Classification

      6.1 A Fundamental Service Classification

      6.2 Basic Services

      6.3 Composed Services

      6.4 Process Services

      6.5 Other Service Classifications

      6.6 Technical and Infrastructure Services

      6.7 Beyond Services

      6.8 Summary

7. Business Process Management

      7.1 BPM Terminology

      7.2 BPM and SOA

      7.3 Example for BPM with Services

      7.4 Business Process Modeling

      7.5 Other Approaches to Identifying Services

      7.6 Orchestration Versus Choreography

      7.7 A Few More Things to Think About

      7.8 Summary

8. SOA and the Organization

      8.1 Roles and Organizations

      8.2 Funding Models

      8.3 Summary

9. SOA in Context

      9.1 SOA-Based Architecture Models

      9.2 Dealing with Frontends and Backends

      9.3 Summary

10. Message Exchange Patterns

      10.1 Introduction to MEPs

      10.2 Basic MEPs

      10.3 More Complicated MEPs

      10.4 Dealing with Reliability and Errors

      10.5 Dealing with Different MEP Layers

      10.6 Event-Driven Architecture

      10.7 Summary

11. Service Lifecycle

      11.1 Services Under Development

      11.2 Services in Production

      11.3 Summary

12. Versioning

      12.1 Versioning Requirements

      12.2 Domain-Driven Versioning

      12.3 Versioning of Data Types

      12.4 Configuration-Management-Driven Versioning

      12.5 Versioning in Practice

      12.6 Summary

13. SOA and Performance

      13.1 Where Performance Matters

      1