We identified three expansion stages that signify the different levels of maturity of an SOA in the enterprise: the fundamental SOA, the networked SOA and the process-enabled SOA.
a) Imagine an airline web site that utilises four services - Flight Service, Customer Service, Booking Service, Payment Service - that encapsulates the major business entities and their behaviours that are relevant to the business processes that are exposed to their customers. Describe, using the layering approach to SOA, how the above could be arranged in order to meet the requirements of the fundamental SOA. Clearly state any assumptions you made.
b) The third expansion stage is the fully leveraged SOA and is termed as the process-enabled SOA, which deals with process-centric services. What are possible reasons for introducing a process-centric service?
c) Imagine now having a new process “Booking process” which encapsulates the business process “Booking”. Without using facades or any other type of intermediary layer, provide an enhanced diagram of your booking process in part. Clearly state any assumptions you made.
WS-Coordination specification provides a framework for managing complex service activities, by introducing a generic service, based on the coordinator service model. This coordinator composition consists of the following services: Activation service, Registration service, Protocol-specific services and a Coordinator.
a) Describe the role of each service and the coordinator?
b) Each coordinator is based on a coordination type. Define coordination type.
c) Describe the activation and registration process of the coordination service composition.