Designing Web Services with Tropos

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Designing Web Services with Tropos
Paper Authors Diana Lau and John
Mylopoulos Electronic Commerce
Technologies Paper Presentation Presented by
Vandana Mandalika School of Computer
Science Carleton University
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Introduction to Tropos

• Web Services are self-contained, self describing,
  modular applications that
• can be published, located, and invoked across the
  web.
• Agent oriented programming -In AOP, objects known
  as agents interact to achieve individual goals.
• Agents can be autonomous entities, which decides
  their next step without user interference or can
  be controllable, serving in between the user and
• another agent .
• Tropos is an agent-oriented software engineering
  methodology that spans early requirements, late
  requirements, architectural and detailed design.

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Tropos Concepts

• Actor
• Goal
• Social Dependency
• Capability
• Example

Maximize profit
Purchase product at lower price
Own products
Retailer
Customer
Repeatable business
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Summary of the Paper

• Early requirements analysis
• Identify stakeholders
• Identify goals, actors and dependencies
• Conduct mean end analysis
• Late requirements analysis
• Architectural design
• Identify subsystems
• Identify actor capabilities
• Assign capabilities to agents
• Later stage
• Detailed design Agent-based UML
• Implementation WSDL, SOAP, UDDI, JACK

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Lessons Learned

• Web Services has special design requirements.
• This is an approach to model and design web
  services that is close to system objectives and
  requirements.
• Compare UML and Tropos.

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Comparing UML and Tropos
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Questions

• What are the objectives of Web Services?
• What is Agent-oriented programming?
• At what stages of design is Tropos useful?