Service qos composition at the level of part names

  • Authors:

  • Marco Aiello;Florian Rosenberg;Christian Platzer;Agata Ciabattoni;Schahram Dustdar

  • Affiliations:

  • VitaLab, Distributed Systems Group, Information Systems Institute, Vienna University of Technology, Vienna, Austria;VitaLab, Distributed Systems Group, Information Systems Institute, Vienna University of Technology, Vienna, Austria;VitaLab, Distributed Systems Group, Information Systems Institute, Vienna University of Technology, Vienna, Austria;VitaLab, Distributed Systems Group, Information Systems Institute, Vienna University of Technology, Vienna, Austria;VitaLab, Distributed Systems Group, Information Systems Institute, Vienna University of Technology, Vienna, Austria

  • Venue:
  • WS-FM'06 Proceedings of the Third international conference on Web Services and Formal Methods
  • Year:
  • 2006

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Abstract

The cornerstone for the success of Service-Oriented Computing lies in its promise to allow fast and easy composition of services to create added-value applications. Compositions need to be described in terms of their desired functional properties, but the non-functional properties are of paramount importance as well. Inspired by the Web service challenge we propose a new model for describing the Quality of Service (QoS) of a composition which considers the information flow and describes basic service qualities at the granularity level of service part names, that is, operations comprised in service invocation/response messages. In this initial investigation, we overview a number of formal methods techniques that allow to reason with QoS composition based on the proposed model, and propose an algorithm for determining the QoS of a composition given the QoS associated with the individual services.