Optimizing non-functional Properties of a Service Composition using a Declarative Model-to-Model Transformation
Andreas Petter, Stephan Borgert, Erwin Aitenbichler, Alexander Behring, Max Mühlhäuser · TUbilio (Technical University of Darmstadt) · 2009
Developing applications comprising service composition is a complex task. Service composition requires the knowledge of various process languages (e.g. WS-BPEL, XPDL, or WSFL) or the knowledge of languages like WS-CDL which focus more on messaging aspects. To choose the right language for the problem at hand requires a lot of research as different aspects of various languages need to be considered. Therefore, to lower the skill barrier for developers it is important to describe the problem on an abstract level and not to focus on implementation details. This can be done using declarative programming which fosters to describe only the result of the problem (which is what the developer wants) rather than the description of the implementation. We therefore use purely declarative model-to-model transformations written in a universal model transformation language which is capable of handling even non-function properties using optimization and mathematical programming. This makes it easier to understand and describe service composition and non-fuctional properties for the developer.