Avaliação de desempenho da composição de web services usando redes de petri

Abstract

Web Services have played an important role in the development of distributed systems. In particular, the possibility of composing already implemented Web Services in order to provide a new functionality is an interesting approach for building distributed systems. However, choosing the better composition still a challenger as different qualities may be observed in the composition, such as security, performance, fault tolerance, and so on. In this context, this paper proposes a methodology based on Stochastic Petri Nets to model, evaluate and help to choose Web Service compositions considering performance aspects. In order to illustrate the proposed methodology, we applied it to a classical case study of credit approving.