This presentation uses a case study to illustrate how the major principles of Service Oriented Architecture, modeling, and design can be applied. The case study is based on a service provider that has built SOA based software infrastructure to conduct fully automated B2B transactions with several major business partners.

Building a SOA that is based on well thought through service layers and service boundaries requires to clearly focus on key service qualities like reusability, statelessness, loose coupling, and composability of services into business processes, to name a few. These qualities form a continuous thread throughout the modeling of orchestration services, application services and infrastructure services. The presentation drills down into high level service design and explains the decisions and tradeoffs for determining the “right degree of service orientation” – e.g. if WSDL is required, choosing between SOAP and HTTP, why REST based Web Services is a viable alternative to "pure" Web Services, etc.