COSMA – An Approach for Managing SLAs in Composite Services

  • André Ludwig
  • Bogdan Franczyk
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5364)


Service provisioning is largely built on agreements specifying the mutual responsibilities of service providers and their customers with respect to functional and non-functional parameters. Current SLA management approaches, i.e. WSLA, WS-Agreement, or WSOL, provide extensive SLA language formalizations and management frameworks. However, they focus on bi-lateral service requester/provider constellations neglecting the SLA management requirements of composite service providers, i.e. managing SLAs with atomic service providers and with composite service requesters and aligning both with each other. A SLA management solution for composite services has to consider the contribution of sourced services - formalized in their (atomic) SLAs (ASLA) - in the management of the provided service - formalized in its respective (composite) SLA (CSLA). This paper presents the novel COmposite Sla MAnagement (COSMA) approach for an integrated management of atomic and composite SLAs during their entire lifecycle. It can be utilized for controlling the relationships between ASLAs/CSLAs and thus serves as the basis for managing and optimizing the SLAs involved in composite services.


Service Composition Service Level Agreement Composite Service Service Level Agreement Violation Atomic Service 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Papazoglou, M.P.: Web Services: Principles and Technology. Prentice Hall, Essex (2007)Google Scholar
  2. 2.
    Alonso, G., Casati, F., Kuno, H., Machiraju, V.: Web services: concepts, architectures and applications. Springer, New York (2004)CrossRefzbMATHGoogle Scholar
  3. 3.
    Keller, A., Ludwig, H.: The WSLA Framework: Specifying and Monitoring Service Level Agreements for Web Services. J. of Network and Systems Management 11, 57–81 (2003)CrossRefGoogle Scholar
  4. 4.
    Andrieux, A., Czajkowski, K., Dan, A., Keahey, K., Ludwig, H., Nakata, T., Pruyne, J., Rofrano, J., Tuecke, S., Xu, M.: Web Service Agreement Specification (WS-Agreement),
  5. 5.
    Tosic, V., Patel, K., Pagurek, B.: WSOL - Web Service Offerings Language. In: Bussler, C.J., McIlraith, S.A., Orlowska, M.E., Pernici, B., Yang, J. (eds.) CAiSE 2002 and WES 2002. LNCS, vol. 2512, pp. 57–67. Springer, Heidelberg (2002)CrossRefGoogle Scholar
  6. 6.
    Ludwig, A., Braun, P., Kowalczyk, R., Franczyk, B.: A Framework for Automated Negotiation of Service Level Agreements in Service Grids. In: Bussler, C.J., Haller, A. (eds.) BPM 2005. LNCS, vol. 3812, pp. 89–101. Springer, Heidelberg (2006)CrossRefGoogle Scholar
  7. 7.
    Integrated Project Adaptive Services Grid (ASG),
  8. 8.
    Momotko, M., Gajewski, M., Ludwig, A., Kowalczyk, R., Kowalkiewicz, M., Zhang, J.Y.: Towards adaptive management of QoS-aware service compositions. J. of Multiagent and Grid Systems 3, 299–312 (2007)CrossRefzbMATHGoogle Scholar
  9. 9.
    Jaeger, M.C., Rojec-Goldmann, G., Muehl, G.: QoS aggregation for Web service composition using workflow patterns. In: 8th International IEEE Enterprise Distributed Object Computing Conference (EDOC 2004), Monterey, pp. 149–159 (2004)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • André Ludwig
    • 1
  • Bogdan Franczyk
    • 1
  1. 1.Information Systems InstituteUniversity of LeipzigLeipzigGermany

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