Service Design Patterns

Service Design Patterns

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Opis: Service Design Patterns - Robert Daigneau

Web services have been used for many years. In this time, developers and architects have encountered a number of recurring design challenges related to their usage, and have learned that certain service design approaches work better than others to solve certain problems. In Service Design Patterns, Rob Daigneau codifies proven design solutions for web services that follow the REST architectural style or leverage the SOAP/WSDL specifications. This catalogue identifies the fundamental topics in web service design and lists the common design patterns for each topic. All patterns identify the context in which they may be used, explain the constituent design elements, and explore the relative strengths and trade-offs. Code examples are provided to help you better understand how the patterns work but are kept general so that you can see how the solutions may be applied to disparate technologies that will inevitably change in the years to come. This book will help readers answer the following questions: * How do you create a web service API, what are the common API styles, and when should a particular style be used?* How can clients and web services communicate, and what are the foundations for creating complex conversations in which multiple parties exchange data over extended periods of time?* What are the options for implementing web service logic, and when should a particular approach be used?* How can clients become less coupled to the underlying systems used by a service?* How can information about a web service be discovered?* How can generic functions like authentication, validation, caching, and logging be supported on the client or service?* What changes to a service cause clients to break?* What are the common ways to version a service? How can web services be designed to support the continuing evolution of business logic without forcing clients to constantly upgrade? This book is an invaluable resource for enterprise architects, solution architects, and developers who use web services to create enterprise IT applications, commercial or open source products, and Software as a Service (SaaS) products that leverage emerging Cloud platforms.Foreword by Martin Fowler xi Foreword by Ian Robinson xiii Preface xv Acknowledgments xxiii About the Author xxv Chapter 1: From Objects to Web Services 1 What Are Web Services? 2 From Local Objects to Distributed Objects 3 Why Use Web Services? 6 Web Service Considerations and Alternatives 7 Services and the Promise of Loose Coupling 9 What about SOA? 10 Summary 11 Chapter 2: Web Service API Styles 13 Introduction 13 Design Considerations for Web Service APIs 14 RPC API 18 Message API 27 Resource API 38 Chapter 3: Client-Service Interactions 51 Introduction 51 Request/Response 54 Request/Acknowledge 59 Media Type Negotiation 70 Linked Service 77 Chapter 4: Request and Response Management 83 Introduction 83 Service Controller 85 Data Transfer Object 94 Request Mapper 109 Response Mapper 122 Chapter 5: Web Service Implementation Styles 131 Introduction 131 Design Considerations for Web Service Implementation 132 Transaction Script 134 Datasource Adapter 137 Operation Script 144 Command Invoker 149 Workflow Connector 156 Chapter 6: Web Service Infrastructures 165 Introduction 165 Service Connector 168 Service Descriptor 175 Asynchronous Response Handler 184 Service Interceptor 195 Idempotent Retry 206 A Quick Review of SOA Infrastructure Patterns 220 Chapter 7: Web Service Evolution 227 Introduction 227 What Causes Breaking Changes? 228 Common Versioning Strategies 232 Single-Message Argument 234 Dataset Amendment 237 Tolerant Reader 243 Consumer-Driven Contracts 250 How the Patterns Promote or Hinder Service Evolution 264 Appendix: Reference to External Patterns 269 Glossary 277 Bibliography 297 Index 303


Szczegóły: Service Design Patterns - Robert Daigneau

Tytuł: Service Design Patterns
Autor: Robert Daigneau
Producent: Addison Wesley Publishing Company
ISBN: 9780321544209
Rok produkcji: 2011
Ilość stron: 352
Oprawa: Twarda
Waga: 0.69 kg


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