A framework for QoS-aware binding and re-binding of composite web services

  • Authors:

  • Gerardo Canfora;Massimiliano Di Penta;Raffaele Esposito;Maria Luisa Villani

  • Affiliations:

  • RCOST - Research Centre on Software Technology, Department of Engineering, University of Sannio, Viale Traiano, 82100 Benevento, Italy;RCOST - Research Centre on Software Technology, Department of Engineering, University of Sannio, Viale Traiano, 82100 Benevento, Italy;RCOST - Research Centre on Software Technology, Department of Engineering, University of Sannio, Viale Traiano, 82100 Benevento, Italy;RCOST - Research Centre on Software Technology, Department of Engineering, University of Sannio, Viale Traiano, 82100 Benevento, Italy

  • Venue:
  • Journal of Systems and Software
  • Year:
  • 2008

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Abstract

QoS-aware dynamic binding of composite services provides the capability of binding each service invocation in a composition to a service chosen among a set of functionally equivalent ones to achieve a QoS goal, for example minimizing the response time while limiting the price under a maximum value. This paper proposes a QoS-aware binding approach based on Genetic Algorithms. The approach includes a feature for early run-time re-binding whenever the actual QoS deviates from initial estimates, or when a service is not available. The approach has been implemented in a framework and empirically assessed through two different service compositions.