Where to adapt dynamic service compositions

International Conference on World Wide WebThis work is partially supported by GRF grants of the Research Grants Council of Hong Kong. Poster Track of Proceedings of the 18th International Conference on World Wide Web (WWW 2009), Madrid, Spain, 20-24 April 2009Peer services depend on one another to accomplish their tasks, and their structures may evolve. A service composition may be designed to replace its member services whenever the quality of the composite service fails to meet certain quality-of-service (QoS) requirements. Finding services and service invocation endpoints having the greatest impact on the quality are important to guide subsequent service adaptations. This paper proposes a technique that samples the QoS of composite services and continually analyzes them to identify artifacts for service adaptation. The preliminary results show that our technique has the potential to effectively find such artifacts in services. Copyright is held by the author/owner(s).preprin