A Petri Net Based Approach for Reliability Prediction of Web Services.

Web service composition is a distributed model to construct new web service on top of existing primitive or other composite web services. Many research efforts have been made in web services composition and coordination. In such a scenario, an important issue is how to assess the degree of trustworthiness one can have about the web service composition, especially their performance and dependability characteristics. In this paper, we propose a petri net based approach to predict the reliability of web service composition. The first step of the approach involves the transformation of web service composition specification into Stochastic Petri Nets (SPN) model. The proposed transformation is built upon BPEL. From the SPN model, we can derive the reliability and performance measure of web service composition. [ABSTRACT FROM AUTHOR]