Using QoS Contracts to Drive Architecture-Centic Self-Adaptation

Franck Chauvel 1 Hui Song 1 Xiang Ping 1 Gang Huang 1 Hong Mei 1
1 Software Engineering Institute [Peking]
Abstract : Self-adaptation is now a promising approach to maximize the satisfaction of requirements under changing environmental conditions. One of the key challenges for such self-adaptive systems is to automatically find a relevant architectural configuration. Existing approaches requires a set of adaptation strategies and the rough estimation of their side-effects. However, due to the lack of validation methods for such strategies and side-effects, existing approaches may lead to erroneous adaptations. Instead of side-effects, our solution leverages quality contracts whose accuracy can be separately established and which can be dynamically composed to get a quality prediction of any possible architectural configurations. To support self-adaptation, we propose a reactive planning algorithm which exploits quality contracts to dynamically discover unforeseen architectural configurations. We illustrate our approach using a running HTTP server adapting its architecture with respect to the number and the similarity of incoming requests.
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Communication dans un congrès
G. T. Heineman and J. Kofron and F. Plasil. Proceedings of the 6th Intl. Conference on Quality of Software Architecture (QoSA 2010), Jun 2010, Prague, Czech Republic. Springer Berlin / Heidelberg, 6093, pp.102--118, 2010
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Franck Chauvel, Hui Song, Xiang Ping, Gang Huang, Hong Mei. Using QoS Contracts to Drive Architecture-Centic Self-Adaptation. G. T. Heineman and J. Kofron and F. Plasil. Proceedings of the 6th Intl. Conference on Quality of Software Architecture (QoSA 2010), Jun 2010, Prague, Czech Republic. Springer Berlin / Heidelberg, 6093, pp.102--118, 2010. 〈inria-00513189〉

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