Abstract
Web service composition makes use of existing Web services to build complex business processes. Non-functional requirements are crucial for the Web service composition. In order to satisfy non-functional requirements when composing a Web service, one needs to rely on the estimated quality of the component services. However, estimation is seldom accurate especially in the dynamic environment. Hence, we propose a framework, ADFlow, to monitor and adapt the workflow of the Web service composition when necessary to maximize its ability to satisfy the non-functional requirements automatically. To reduce the monitoring overhead, ADFlow relies on asynchronous monitoring. ADFlow has been implemented and the evaluation has shown the effectiveness and efficiency of our approach. Given a composite service, ADFlow achieves 25 %–32 % of average improvement in the conformance of non-functional requirements, and only incurs 1 %–3 % of overhead with respect to the execution time.
This work is supported by research project T2MOE1303.
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Chen, M. et al. (2016). Service Adaptation with Probabilistic Partial Models. In: Ogata, K., Lawford, M., Liu, S. (eds) Formal Methods and Software Engineering. ICFEM 2016. Lecture Notes in Computer Science(), vol 10009. Springer, Cham. https://doi.org/10.1007/978-3-319-47846-3_9
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