Service-Oriented Design (Part IV: Business Process Design)

Service Oriented Design (Part IV Business Process Design)

The orchestration service layer provides a powerful means by which contemporary service-oriented solutions can realize some key benefits. The most significant contribution this sub-layer brings to SOA is an abstraction of logic and responsibility that alleviates underlying services from a number of design constraints.

For example, by abstracting business process logic:

  • Application and business services can be freely designed to be process-agnostic and reusable.
  • The process service assumes a greater degree of statefulness, thus further freeing other services from having to manage state.
  • The business process logic is centralized in one location, as opposed to being distributed across and embedded within multiple services.

In this chapter we tackle the design of an orchestration layer by using the WS-BPEL language to create a business process definition.


How case studies are used: Our focus in this chapter is the TLS environment. We provide case study examples throughout the step-by-step process description during which TLS builds a WS-BPEL process definition for the Timesheet Submission Process. This is the same process for which service candidates were modeled in Chapter 12 and for which the Employee Service interface was designed in Chapter 15.


Case Studies

Part I: SOA and Web Services Fundamentals

Introducing SOA

The Evolution of SOA

Web Services and Primitive SOA

Part II: SOA and WS-* Extensions

Web Services and Contemporary SOA (Part I: Activity Management and Composition)

Web Services and Contemporary SOA (Part II: Advanced Messaging, Metadata, and Security)

Part III: SOA and Service-Orientation

Principles of Service-Orientation

Service Layers

Part IV: Building SOA (Planning and Analysis)

SOA Delivery Strategies

Service-Oriented Analysis (Part I: Introduction)

Service-Oriented Analysis (Part II: Service Modeling)

Part V: Building SOA (Technology and Design)

Service-Oriented Design (Part I: Introduction)

Service-Oriented Design (Part II: SOA Composition Guidelines)

Service-Oriented Design (Part III: Service Design)

Service-Oriented Design (Part IV: Business Process Design)

Fundamental WS-* Extensions

SOA Platforms

Appendix A. Case Studies: Conclusion

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Service-Oriented Architecture. Concepts, Technology, and Design
Service-Oriented Architecture (SOA): Concepts, Technology, and Design
ISBN: 0131858580
EAN: 2147483647
Year: 2004
Pages: 150
Authors: Thomas Erl
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