The document discusses the evolution of service-oriented architecture (SOA) in relation to cloud computing, emphasizing the continuing relevance of SOA despite claims of its obsolescence. It highlights key principles of SOA that focus on flexibility and value-driven approaches, while introducing a cloud-centric model for organizing IT resources. The text also addresses emerging trends such as democratization and dynamic business models shaped by interconnectivity in a 'cloud of clouds'.

1. SOA and Cloud ComputingDavid Choudavid.chou@microsoft.comblogs.msdn.com/dachou

2. State of SOAPerceptionsSOA = IT centralization/standardization“SOA is dead” (Anne Thomas Manes, Burton Group; January 2009)Cloud computing will replace SOARealitySOA does not solve all enterprise IT issuesSOA is complex, and difficultCore value of SOA is agility, but needs varySOA demands change, but organizational resistance is often the biggest impedimentNeed to focus on architecture, not technology

3. SOA Manifestohttp://www.soa-manifesto.org/Service orientation is a paradigm that frames what you do. Service-oriented architecture (SOA) is a type of architecturethat results from applying service orientation. We have been applying service orientation to help organizations consistently deliver sustainable business value, with increased agilityand cost effectiveness, in line with changing business needs. Through our work we have come to prioritize: Business value over technical strategy Strategic goals over project-specific benefits Intrinsic interoperability over custom integration Shared servicesover specific-purpose implementations Flexibilityover optimization Evolutionary refinement over pursuit of initial perfection That is, while we value the items on the right, we value the items on the left more.

4. SOA PrinciplesReuse

5. Granularity / Modularity / Componentization

6. Loose Coupling / Contractual Design

7. Interoperability / Standards Compliance

8. Abstraction / Encapsulation

9. Composability

10. Discoverability