A precise definition of QoS for web services and its application in the invocation of applications from a workflow

  • Authors:

  • Narayan Debnath;Paola Martellotto;Marcela Daniele;Daniel Riesco;German Montejano

  • Affiliations:

  • Department of Computer Science, Winona State University, Winona, MN;Universidad Nacional de Río Cuarto, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Dpto. de Computación, Río Cuarto, Argentina;Universidad Nacional de Río Cuarto, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Dpto. de Computación, Río Cuarto, Argentina;Universidad Nacional de San Luis, Facultad de Ciencias Físico Matemáticas y Naturales, Departamento de Informática, San Luis, Argentina;Universidad Nacional de San Luis, Facultad de Ciencias Físico Matemáticas y Naturales, Departamento de Informática, San Luis, Argentina

  • Venue:
  • Journal of Computational Methods in Sciences and Engineering
  • Year:
  • 2011

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Abstract

The Workflow Reference Model standardizes workflow application development, in order to achieve the interoperability of different workflows. The web services technology allows optimizing the invocation of applications from the workflow engine, so that the workflow engine does not need to know the location of the application to invoke, and that any application can be relocated without involving a change in its invocation. But UDDI, the protocol used to register and locate web services, has some problems in establishing the correspondence between requester requirements and the specifying of services that have the same semantic behavior, even with different syntactic description. Furthermore, in the selection of a web service their quality attributes (QoS) are not considered. This proposal applies to the case study OpenUP/Basic, focusing on the quality attributes of web services for optimal selection and invocation.