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Examples of SOA

In this tip, Thomas Erl explains what could be considered an example of service-oriented architecture.

Creative mash-ups like HousingMaps use two separate online services, GoogleMaps and www.craigslist.com, to display real estate listings, including photos, over maps of the corresponding neighborhood. Is this an example of SOA?

Any solution that utilizes services and adheres to the service-orientation paradigm can be considered "service-oriented". The extent to which service-orientation is realized typically determines the measure to which a "true SOA" is eventually created. If the services in your example are a peripheral part of a larger RPC-centric solution consisting of a collection of tightly bound components with little reuse potential, then it would likely not have realized service-orientation to a degree sufficient enough to attain some of the more strategic benefits associated with SOA.

This was first published in April 2006

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