Abstract
In the context of Cloud computing, a service can be invoked by distinct devices having different HW/SW characteristics; therefore, the content must be adapted to each device profile. A solution consists in having a middleware server that receives requests from the clients, forwards them to the cloud, and adapts the answers coming from the cloud on the base of device profiles. This paper proposes a formalization of this framework using Abstract State Machines (ASMs). The modeling process is based on the ASMs refinement method, and has been guided and supported by several validation and verification activities to guarantee consistency, correctness, and reliability properties.
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Notes
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If we need some extra information regarding the device, and we cannot get it using modernizr, then we use a device detection database tool, as WURFL. However, this feature is not considered in this work.
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All the specifications are available at http://www.cdcc.faw.jku.at/publications/rchelemen/WS_FM_FASOCC2014_models.zip.
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Note that we have actually checked a slightly different property, because in NuSMV (the model checker used by AsmetaSMV) a CTL formula holds if it holds in all initial states. More information can be found in the NuSMV FAQ http://nusmv.fbk.eu/faq.html#007.
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Arcaini, P., Holom, RM., Riccobene, E. (2016). Modeling and Formal Analysis of a Client-Server Application for Cloud Services. In: Hildebrandt, T., Ravara, A., van der Werf, J., Weidlich, M. (eds) Web Services, Formal Methods, and Behavioral Types. WS-FM WS-FM 2014 2015. Lecture Notes in Computer Science(), vol 9421. Springer, Cham. https://doi.org/10.1007/978-3-319-33612-1_4
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