Introduction to
Service-Orientation
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Service-Orientation
Design Principles
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Effects of Service-Orientation on the Enterprise
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Service-Orientation
in the Real World
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Service-Orientation Design Principles
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Service Composability
"Services are effective composition participants, regardless of the size and complexity of the
composition."
As the sophistication of service-oriented solutions continues to grow, so does the complexity of underlying service composition configurations. The ability to effectively compose services is a critical requirement for achieving some of the most fundamental goals of service-oriented computing.
Complex service compositions place demands on service design that need to be anticipated to avoid massive retro-fitting efforts. Services are expected to be capable of participating as effective composition members, regardless of whether they need to be immediately enlisted in a composition. The principle of Service Composability addresses this requirement by ensuring that a variety of considerations are taken into account.
Figure: The Service Composability design principle helps determine how to carry out a separation of concerns in support of service-orientation. The services that result from the illustrated decomposition of solution logic are assembled to solve Problem A. However, the ultimate, strategic benefit comes with the ability to continually recompose these services to help solve additional problems in the future.
How the application of this design principle helps prepare services for the world of complex compositions is described in Chapter 13: Service Composability (Composition Member Design and Complex Compositions).
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