A mediator system for improving the dependability of Web Services

Speaker: Yuhui Chen (Jeff)

Abstract

Web Services bring unprecedented flexibility into e-commerce and e-science system architecture. It is becoming a key factor in the success of many e-Science or e-Commercial projects. As a prominent role in the integration of distributed computing infrastructure, Web Services need to provide high Quality of Services. However service-oriented architectures are inherently unreliable due to different internal and external errors and faults. Users may even experience service failures entirely caused by network problems. Most of current approaches concentrated on adopting fault tolerance mechanism to tolerate internal errors within an individual Web Service or the integration of a group of Web Services. In this talk, I will briefly present a novel solution for improving the dependability of Web Services. This solution is based on a concept of Web Services mediator, which provides efficient mechanism to tolerate external failures, especially communication faults between users and the Web Services, which result in undependable services delivered to Web Services users. Our approach can improve the dependability of pre-existing Web Services without modification on them and benefit Web Services users by providing dependable services to them.