The Research On Fault-tolerant Method Of Web Services Composition

As the most important model of distributed computing, Web services have a vast prospect in many domains such as electric commerce, business flows and so on. At present, Trust research of Web services is an important department of the research in Web services. Fault-tolerant is the key technology that is belonged to the base problem of distributed computing in trust research of Web services.We focus on typical of Web services and investigate the method of fault-tolerant in Web services composition. The following is our top research.First of all, we classify and grade the faults that are monitored in the composition running. The new fault taxonomy is in order to Fault-Tolerant.Secondly, a fault-tolerant Web services architecture is proposed to protect that the flow of Web services composition is completed. In this framework, services composition flow can repair the faults self-healing, in flow running. It is in order to pervade from services fault, and then there is ability about fault-tolerant in this framework.Thirdly, we take a data structure-two ways chained list in our framework, in that structure we can describe Web services in composition and the communication between services. Two ways chained list afford well computation method and flexible backtrack for fault-tolerant of Web services composition. This structure is key of service rebuilding when the services composition is running.And than, we monitor the composition in passive and active. We proposed different policies when different kinds fault occur in different composition flow. Thought this method, Web services composition can be completed.At last, we proof the validation about framework and policies by analogy experiment in JADE platform.