Summer vacation is over for most families with children. School has either started or is imminently going to... vacations are therefore usually over and we are back into the swing of things. We were talking about building the layers of an SOA, based on an SOA reference model. Let's discuss how to build the service component layer which is responsible for realizing the functionality and quality (adherence to non-functional requirements) of the service.
OK. So we assume know how to model and design an SOA. For that, we use some sort of Service-oriented Modeling method such as SOMA.
You have gone through Identification, Specification and Realization of Services, Service Components and Flows (processes).
During Realization you need to build the SOA. You need to map each service, service component and flow to a realization decision.
Once you have this table, you then have an idea of what you will:
3. Integrate (wrap, adapt)
4. Subscribe to (if event driven or publish and subscribe)
5. Transform (break apart a legacy system to get access to hitherto hidden nuggest of functionality not exposed in the orginal application)
Let's take number 1. Build. Building something is often about using a programming model to construct that piece of software.
In the 6th installation of the SOA Programming Model, Ferguson, Stockton and Nally talk about "A language-neutral, component-based programming model for service-oriented architecture (SOA) facilitates the implementation of Web services and their assembly into solutions."
This describes how to build the service components that will implement or realize your services.
The previous set of articles in that series can be found here.
Build a Better SOA Layer by Layer: The Service Component Layer
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