About 15 years of real-time Java
Proceedings of the 10th International Workshop on Java Technologies for Real-time and Embedded Systems
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Qualityofserviceadaptabilityreferstotheability ofcomponents/services to adapt in run-time the quality exhibited. A composition studyfrom a quality point of view wouldinvestigatehow theseadaptableelements couldbecombinedtomeetsystem’squality requirements.Enclosingqualitypropertieswith architecturalmodelshasbeentypicallyusedto improvesystemunderstanding.Neverthelessthese properties along with some supplementary information about quality adaptation would allow us to carry out a composition study during the design phase and even to predictsomefeaturesoftheadaptabilitybehaviorof the system. Existing modeling languages and tools lack enough mechanismstocope withadaptability,e.g.to describesystemelementsthatmayoffer/require several qualitylevels. This paper shows how we reuse existing modelinglanguages andtools,combinethem and create new ones to tackle the problem of quality of service adaptability and composition. The final goal of this work is to evaluate architectural models to predict system’s QoS behavior before it is implemented.