Bayesian network-based exception handling for web service composition

Nowadays, there are more and more web services published on the internet and the new application systems can be constructed by the composition of such web services. It´s a trend and novel way for enterprises to build dynamic needs in modern markets, which has won a lot of increasing attentions in all fields. However, the application system composed by web services is easy to cause various failures due to the uncontrollable web services and the network instability. In order to guarantee the quality of the web service composition, this paper presents a method of exception handling based on the improved Bayesian network. The relationships between web services and Bayesian network is constructed as the topological structure during the process of web services composition. For getting better performance, the traditional Bayesian network algorithm is improved by modifying parameter setting for determining the prior probability of service nodes and the conditional probability of service output node. The detail of Bayesian Network-based exception handling for web service composition is given and analyzed. An experiment is also performed and the results show the proposed method is feasible and effective.