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Modeling with SoaML, the Service-Oriented Architecture Modeling Language: Part 1. Service Identification Rohit Goel, Tommy Omen, Ashley Pham. Content. Development Process What is SoaML ? Purchase Order Process Example Service Project Organization Service Identification. Development Process.

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  1. Modeling with SoaML, the Service-OrientedArchitecture Modeling Language: Part 1. ServiceIdentificationRohit Goel, Tommy Omen, Ashley Pham

  2. Content • Development Process • What is SoaML? • Purchase Order Process Example • Service Project Organization • Service Identification

  3. Development Process

  4. What is SoaML? • OMG (Object Management Group) Standard • Small set of extensions to UML to support SOA modeling • Aims to promote integration and interoperability of components created by different organizations at different times • Raises level of abstraction to focus on business needs • Enables SOA both on and between existing platforms through model-driven architecture (MDA) • Decouples solution architecture platform implementations to prevent existing solutions from inhibiting platform evolution

  5. Purchase Order Process Example • Scenario: A consortium of companies has decided to collaborate to produce a reusable service for processing purchase orders. • Goals of project: • Establish a common means of processing purchase orders • Ensure that orders are processed in a timely manner and deliver the required goods • Help minimize stock on hand and inventory maintenance costs • Minimize production and shipping costs

  6. Service Project Organization • 3 modeling steps after requirements • Identify capabilities • Exposing appropriate capabilities as services • Defining the service architecture • What do these steps accomplish? • Specifies services • Defines interfaces • Defines implementation (i.e. which service providers provide what services and how).

  7. Package Diagram

  8. Service Identification • SOMA defined techniques for Service Identification • • Goal-service modeling - Identifies capabilities needed to realize business requirements such as strategies and goals • • Domain decomposition - Uses activities in business processes and other descriptions of business functions to identify needed capabilities • • Existing asset analysis - Mines capabilities from existing applications

  9. Service Capability Diagram

  10. Service Capability Diagram w/ Exposed Services

  11. Service Architecture • Formal specification of the business requirements that are performed by interacting service participants. • Contains the same information as the original business process and can be treated as a specification for how to realize that business process. • Service architecture answers the following questions: • What effect is the requirement intended to accomplish? • Who participates to get it done? • What are the roles responsible for? • What roles interact? • What are the rules for how the roles interact? • How do we evaluate whether the requirements were met?

  12. Services architecture for processing purchase orders

  13. Service Architecture (Continued) • Purchase order process is a Service Architecture with 4 roles. • Service architecture takes a role-centered view of the business requirements. • Can be used to realize use cases that capture information about the high-level functional and nonfunctional requirements. • Provides a more formal way of specifying the participants and contracts governing their interactions. Both approaches can be used together.

  14. References Amsden, Jim. (Ed.). (2010). Modeling with Soaml, the service-oriented. IBM Corporation.

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