Application of branching cells to QoS aware service orchestrations

Abstract : By allowing service calls to be guarded by contexts, Asymmetric Event Structures (AES for short) and contextual nets are a convenient framework to model composite Web services or service orchestrations. We equip AES with QoS domains as a framework to capture a number of QoS metrics and their combination. We use the resulting model to formalize QoS-based late service binding in composite services. When subject to QoS-based late service binding, composite services may be non-monotonic with respect to QoS, meaning that strictly improving the QoS of a service may strictly decrease the end-to-end QoS of the composite service, an embarrassing feature for QoS-aware management; we study this issue. Branching cells of AES play a central role in this study.
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Albert Benveniste, Claude Jard, Samy Abbes. Application of branching cells to QoS aware service orchestrations. Theoretical Computer Science, Elsevier, 2014, Models of Interaction: Essays in Honour of Glynn Winskel, 546, ⟨10.1016/j.tcs.2014.02.049⟩. ⟨hal-01158211v2⟩

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