1. Service-Oriented Computing: Semantics, Processes, Agents
August 2004
Chapter 5: Principles of Service-Oriented Computing
Service-Oriented Computing: Semantics, Processes, Agents – Munindar P. Singh and Michael N. Huhns, Wiley, 2005
© Singh & Huhns

2. Highlights of this Chapter
Service-Oriented Computing: Semantics, Processes, Agents
August 2004
Highlights of this Chapter
Use Cases
Service-Oriented Architectures
Major Benefits
Composing Services
Spirit of the Approach
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns
© Singh & Huhns

3. Hint: Consider each vertex and edge in turn
Exercise: In What Ways Do We Need to Enhance the Barebones SOA Architecture?
Hint: Consider each vertex and edge in turn
Service
Broker
Publish or announce
(WSDL)
Find or discover
(UDDI)
Service
Provider
Bind or invoke
(SOAP)
Service
Requestor
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns

4. Description Of a service Of a user Of a context of usage Functionality
Nonfunctional attributes
Of a user
Needs and preferences
Of a context of usage
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns

5. Engagement Execution architecture: P2P, messaging
Transactions: replications, recovery
Coordination
Workflows and processes
Choreographies
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns

6. Collaboration Reasoning Consistency maintenance Negotiation
Organizational modeling
Business protocols, interaction patterns
Contracts, monitoring, and compliance
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns

7. Discovery and Selection
Finding the right services
Semantic matchmaking
Team matchmaking: creating functioning collaborations (organizations)
Economic selection
Reputation and recommendation
Distributed architectures
Accommodating domain-specific or idiosyncratic qualities of service
Trust
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns

8. Engineering Methodologies Service Management Security
Ontologies: for description
Process models: for engagement
Service Management
Deployment
Administration
Scalability
Security
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns

9. Key Concepts for an SOA Loose coupling Implementation neutrality
Flexible configurability
Persistence
Granularity
Teams
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns

10. Chapter 5 Summary Does moving to services create so many problems?
No, these are the needs of open environments
Services merely highlight them
As computing moves from closed to open environments, virtually every technical aspect is up for grabs
Great research and practical opportunities
Think of real-life service engagements
Chapter 5
Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns