Adapt or Perish: Algebra and Visual Notation for Service Interface Adaptation
The proliferation of services on the web is leading to the formation of service ecosystems wherein services interact with one another in ways not necessarily foreseen during their development or deployment. A key challenge in this setting is service mediation: the act of retrofitting existing services by intercepting, storing, transforming, and (re-)routing messages going into and out of these services so they can interact in unforeseen manners. This paper addresses a sub-problem of service mediation, namely service interface adaptation, that arises when the interface that a service provides does not match the interface that it is expected to provide in a given interaction. The paper focuses on reconciling mismatches between behavioural interfaces, i.e. interfaces that capture ordering constraints between interactions. It presents a declarative approach to service interface adaptation based on: (i) an algebra over behavioural interfaces; and (ii) a visual language that allows pairs of provided-required interfaces to be linked through algebraic expressions. These expressions are fed into an execution engine that intercepts, buffers, transforms and forwards messages to enact the adaptation logic.
KeywordsBusiness Logic Message Type Execution Engine Business Process Modeling Notation Service Mediation
Unable to display preview. Download preview PDF.
- 1.Alonso, G., Pautasso, C., Biörnstad, B.: CS Adaptability Container. Deliverable #11, EU FP5 Project, ADAPT (August 2004)Google Scholar
- 5.Fuchs, M.: Adapting web services in a heterogeneous environment. In: Proceedings of the Second IEEE International Conference on Web Services, ICWS 2004, San Diego, California, USA, pp. 656–664 (2004)Google Scholar
- 6.Foster, H., Uchitel, S., Magee, J., Kramer, J.: Tool support for model-based engineering of web service compositions. In: IEEE International Conference on Web Services (ICWS), Orlando FL, USA. IEEE Computer Society Press, Los Alamitos (2005)Google Scholar
- 7.Khalaf, R., Mukhi, N., Curbera, F., Weerawarana, S.: The Business Process Execution Language for Web Services. In: Process-Aware Information Systems. John Wiley & Sons, Chichester (2005)Google Scholar
- 8.Popa, L., Velegrakis, Y., Miller, R., Hernández, M., Fagin, R.: Translating web data. In: Proceedings of the 28th International Conference on Very Large Databases (VLDB), Hong Kong, China, August 2002, pp. 598–609 (2002)Google Scholar
- 9.Schmidt, H., Reussner, R.: Generating adapters for concurrent component protocol synchronisation. In: Proceedings of the 5th IFIP International Conference on Formal Methods for Open Object-Based Distributed Systems (FMOODS), Enschede, The Netherlands. Kluwer Academic Publishers, Dordrecht (2002)Google Scholar
- 10.UN/CEFACT and OASIS. ebXML Business Process Specification Schema (Version 1.01) (2001), http://www.ebxml.org/specs/ebBPSS.pdf
- 12.White, S.: Business Process Modeling Notation (BPMN). Version 1.0 - May 3, 2004, BPMI.org. (2004), www.bpmi.org