Abstract
Service-Oriented Systems (SOS) have gained importance in different application domains thanks to their ability to enable reusable functionality provided via well-defined interfaces, and the increased opportunities to compose existing units, called services, into various configurations. Developing applications in such a setup, by reusing existing services, brings some concerns regarding the assurance of the expected Quality-of-Service (QoS), and correctness of the employed services. In this paper, we describe a formal mechanism of computing service guarantees, automatically. We assume service models annotated with pre- and postconditions, with their semantics given as Priced Timed Automata (PTA), and the forward analysis method for checking the service correctness w.r.t. given requirements. Under these assumptions, we show how to compute the strongest postcondition of the corresponding automata algorithmically, with respect to the specified precondition. The approach is illustrated on a small example of a service modeled as Priced Timed Automaton (PTAn).
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Čaušević, A., Seceleanu, C., Pettersson, P. (2012). Checking Correctness of Services Modeled as Priced Timed Automata. In: Margaria, T., Steffen, B. (eds) Leveraging Applications of Formal Methods, Verification and Validation. Applications and Case Studies. ISoLA 2012. Lecture Notes in Computer Science, vol 7610. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-34032-1_29
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DOI: https://doi.org/10.1007/978-3-642-34032-1_29
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