SOA in Practice. The Art of Distributed System Design - Helion

ebook

Autor: Nicolai M. Josuttis
ISBN: 978-05-965-5155-1
stron: 344, Format: ebook
Data wydania: 2007-08-24
Księgarnia: Helion

Cena książki: 118,15 zł (poprzednio: 137,38 zł)
Oszczędzasz: 14% (-19,23 zł)

Osoby, które kupiły tę książkę, wybierały także »

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

"The principles and experiences described in this book played an important role in making SOA at T-Mobile a success story, with more than 10 million service calls per day."

--Dr. Steffen Roehn, Member of the Executive Committee T-Mobile International (CIO)

"Nicolai Josuttis has produced something that is rare in the over-hyped world of SOA; a thoughtful work with deep insights based on hands-on experiences. This book is a significant milestone in promoting practical disciplines for all SOA practitioners."

--John Schmidt, Chairman, Integration Consortium

"The book belongs in the hands of every CIO, IT Director and IT planning manager."

--Dr. Richard Mark Soley, Chairman and CEO, Object Management Group; Executive Director, SOA Consortium

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Spis treści

SOA in Practice. The Art of Distributed System Design eBook -- spis treści

SOA in Practice
Preface
- What You Should Know Before Reading This Book
- Structure of the Book
- Conventions Used in This Book
- Additional Information
- Safari Books Online
- Feedback, Comments, and Questions
- Acknowledgments
1. Motivation
- Characteristics of Large Distributed Systems
- The Tale of the Magic Bus
- What We Can Learn from the Tale of the Magic Bus
- History of SOA
- SOA in Five Slides
  - Slide 1: SOA
  - Slide 2: Policies and Processes
  - Slide 3: Web Services
  - Slide 4: SOA in Practice
  - Slide 5: SOA Governance and Management Support
2. SOA
- Definitions of SOA
  - SOA Is a Paradigm
  - SOA Aims to Improve Flexibility
- SOA Drivers
  - Distributed Systems
  - Different Owners
  - Heterogeneity
- SOA Concepts
  - Services
  - High Interoperability
  - Loose Coupling
- SOA Ingredients
  - Infrastructure
  - Architecture
  - Processes
  - Governance
- SOA Is Not a Silver Bullet
- SOA Is Not a Specific Technology
- SOA Versus Distributed Objects
- SOA Terminology
- Summary
3. Services
- Services
  - Services Represent Business Functionality
- Interfaces and Contracts
- Additional Service Attributes
  - Self-Contained
  - Coarse-Grained
  - Visible/Discoverable
  - Stateless
  - Idempotent
  - Reusable
  - Composable
  - Technical
  - QoS- and SLA-Capable
  - Pre- and Post-Conditions
  - Vendor-Diverse
  - Interoperable
  - Implemented As Web Services
- Summary
4. Loose Coupling
- The Need for Fault Tolerance
- Forms of Loose Coupling
  - Asynchronous Communication
  - Heterogeneous Data Types
  - Mediators
  - Weak Type Checking
  - Binding
  - Platform Dependencies
  - Interaction Patterns
  - Compensation
  - Control of Process Logic
  - Deployment
  - Versioning
- Dealing with Loose Coupling
- Summary
5. The Enterprise Service Bus
- ESB Responsibilities
- Heterogeneous ESBs
- ESB Differences
  - Point-to-Point Connections Versus Mediation
  - Interceptors
  - Protocol-Driven Versus API-Driven ESB
- Value-Added ESB Services
  - Data Mapping
  - Intelligent Routing
  - Dealing with Security
  - Dealing with Reliability
  - Service Management
  - Monitoring and Logging
  - Business Activity Monitoring (BAM)
  - Service Implementation Support
- Summary
6. Service Classification
- A Fundamental Service Classification
- Basic Services
  - Basic Data Services
  - Basic Logic Services
  - Fundamental SOA
- Composed Services
  - Composed Services for Multiple Backends
  - Composed Services for One Backend
  - Federated SOA
  - Security
- Process Services
  - Process-Enabled SOA
  - Service State Versus Backend State
- Other Service Classifications
  - Dealing with Different Types of Consumers
  - Reading Versus Writing Services
  - Business Categorizations
    - Categorization according to Erl
    - Categorization according to Allen
- Technical and Infrastructure Services
- Beyond Services
- Summary
7. Business Process Management
- BPM Terminology
- BPM and SOA
- Example for BPM with Services
- Business Process Modeling
  - Using Business Process Modeling Tools
  - BPEL
  - Other Business Process Modeling Standards
  - Business Process Modeling with BPEL in Practice
- Other Approaches to Identifying Services
  - Portfolio Management
  - Dont Switch Off Your Brain
- Orchestration Versus Choreography
  - Choreography and SOA
- A Few More Things to Think About
- Summary
8. SOA and the Organization
- Roles and Organizations
  - From Monolithic Systems to Distribution
  - Solution Management
  - Collaboration
  - Management Support
- Funding Models
- Summary
9. SOA in Context
- SOA-Based Architecture Models
  - Logical Architecture Models
  - Mixed Architecture Models
  - Technical Architecture Models
  - Choosing the Right Architecture Model
- Dealing with Frontends and Backends
  - Roles and Responsibilities
  - Multilayer Validation
  - Multifrontendchannel Scenarios
  - Multiapplication Frontends
  - Future Management
- Summary
10. Message Exchange Patterns
- Introduction to MEPs
- Basic MEPs
  - Request/Response
  - One-Way
  - Request/Response Versus Two One-Way Messages
- More Complicated MEPs
  - Request/Callback
  - Publish/Subscribe
- Dealing with Reliability and Errors
  - Fault Messages
  - Technical Errors
- Dealing with Different MEP Layers
- Event-Driven Architecture
- Summary
11. Service Lifecycle
- Services Under Development
  - Iterative Service Development
  - Service Identification
- Services in Production
  - Modifying Services in Production
  - Withdrawing a Service
- Summary
12. Versioning
- Versioning Requirements
- Domain-Driven Versioning
  - Trivial Domain-Driven Versioning
  - Nontrivial Domain-Driven Versioning
- Versioning of Data Types
  - Using Different Types for Different Versions of a Data Type
  - Using the Same Type for Different Versions of a Data Type
  - Using Generic Data Types
  - Summary of Versioning of Data Types
- Configuration-Management-Driven Versioning
- Versioning in Practice
  - Modifications Should Impact Only the Provider and Consumer(s)
  - Call Constraints Should be Considered
- Summary
13. SOA and Performance
- Where Performance Matters
- From Remote Stored Procedures to Services
- Performance and Reusability
  - Call Constraints
  - Customized Services
  - Reusability in Practice
- Performance and Backward Compatibility
- Summary
14. SOA and Security
- Security Requirements
- Dealing with Security Requirements
  - Interoperability Versus Security
  - Heterogeneity and Security
  - Distributed Processes and Many Layers of Abstraction
  - Multiclient Capabilities
- SOA Security in Practice
  - Infrastructures Dont Provide Sufficient Security
  - Dealing with Confidentiality and Integrity
  - Security as a Service
  - Security, Performance, and State
  - Security in Reality
- Security with XML and Web Services
  - SAML
  - XML and Web Services Security Standards
  - XML and Web Services Attacks
- When Security Comes into Play
- Summary
15. Technical Details
- Services and State
  - Stateless Services
  - Stateful Services
  - Why Stateless Services Are Better
  - Stateless Services in Practice
- Idempotency
  - Idempotent Services
  - Implementing Idempotency
- Testing and Debugging
  - Unit Tests
  - Distributed Testing
  - Correlation IDs
- Dealing with Technical Data (Header Data)
- Data Types
  - Fundamental Data Types
  - Reference Semantics
  - Higher Data Types
- Error Handling
- Summary
16. Web Services
- Motivation for Using Web Services
  - What Are Web Services?
  - History of Web Services
- Fundamental Web Services Standards
  - WSDL
  - WSDL by Example
  - SOAP
  - UDDI
- Web Services in Practice
  - Open Standardization
  - Protocol Aspects
  - The WSDL Lifecycle
  - WSDL Deficits
  - So, Should You Use Web Services?
- Closing Notes
- Summary
17. Service Management
- The History of Service Brokers
- Repositories and Registries
  - Designing Repositories and Registries
  - Establishing Repositories and Registries
- Summary
18. Model-Driven Service Development
- Generated Service Code
- Modeling Services
  - Terminology
  - The Model-Driven Tool Chain
- Meta Models in Practice
- Setting Up MDSD Processes
  - Consumer-Driven Transformations
  - Provider-Driven Transformations
  - Third-Party-Driven Transformations
  - MDSD Processes in Practice
  - Labeling
  - Debugging
  - Manually Modified Generated Code
  - The Code-Generation Granularity Dilemma
  - Deployment and Robustness
- Tools
  - XSLT
  - MDSD Tools
- Avoiding Bottlenecks
- Summary
19. Establishing SOA and SOA Governance
- Introducing SOA
- SOA Governance
  - Definition of Governance
  - Central SOA Teams
- SOA Step-by-Step
  - Step 1: Understand SOA
  - Step 2: The SOA Pilot
  - Step 3: The Second and Third SOA Projects
  - Step 4: Grow and Become a General Strategy
  - Tasks Necessary over All Steps
- Other SOA Approaches
  - The Four Ps, by Pulier and Taylor
  - Architectural Roadmap, by Krafzig, Banke, and Slama
  - Top-Down or Bottom-Up, by Krafzig and Slama
  - SOA Drivers, by Anne Thomas Manes
  - Essence of Different SOA Approaches
- Additional Recommendations
  - Policies
  - Dealing with People
  - SOA Maturity Models
- Summary
20. Epilogue
- Is SOA Something New?
- Does SOA Increase Complexity?
- What Are the Key Success Factors for SOA?
- Where Is SOA Not Appropriate?
- Does SOA Replace OOP?
References
Glossary
Index
About the Author
COLOPHON
Copyright