Research On Web Service Worklfow Transaction Model

Web service, a new type of Web application, carries the characteristics of reusability, autonomy,heterogeneity. And it can be easily integrated. Web service is mainly used in enterprise applicationintegration and the area of electronic commerce. It can be employed to solve the problems rangingfrom the processing of simple service requests to the processing of complex business service inte-gration. Workflow technology, which has convenient design mode for process, mainly focuses oncoordination and organization. By reusing existing services, workflow technology can help toachieve Web services integration, but it is difficult to guarantee the consistency and reliability of thesystem. How to ensure the consistency and reliability of such Web services integration is the focusof research in the field of workflow transaction.In this paper, a web service workflow transaction model is proposed, which combines the coor-dination method specified by Web services transaction specification (Web Services Coordination/Transaction, WS-C/T) and workflow based BPEL (Business Process Execution Language) processdesign. The model enhances the system’s portability and reuse value by separating business logicfrom transaction coordination. It is chiefly composed of clients, BPEL execution engine, a transac-tion coordinator and participants. A client initiates a request, and then BPEL execution engine givesresponse and starts a transaction. Finally the transaction coordinator and the participants completethe coordination by means of transaction coordination algorithm. In the final part of this paper, fea-sibility of the system is verified by a test on a specific instance.