The Study And Implementation Of Dynamic Selection Of Web Service In SDOWSCS

Web Service composition brings a great chance to e_commerce application of enterprises along with the development of Internet. It has raised the opportunity for service providers and application developers to develop value-added services by combining existing web services. Internet has a lot of Web Service we can access, but most of them are in the state of isolation. Each of them has its own function, little relationship with others. Now how to compose Web Services that deal with creating complex services by using existing services to create a new Web Service is a hot research topic.The thesis focuses on this application to design and implement a Service Design Oriented Web Service Composition System based on budget travelling field and supported by service ontology. This system can automatically provide the whole process of Web Service composition from designing with graphics to choosing services dynamically and executing them after users bring up their requirements.The main content of this thesis is the mechanism of dynamic selection of Web Service. After introducing the research background, the thesis discusses the topic related to the Web Service composition and dynamic selection. Then the thesis uses the algorithm of dynamic layout to select the Services based on Web Service Quality Model and the specification of BPEL4WS to describe the business process of Web Service composition in the SDOWSCS system. In the end, the thesis gives the detailed process of realization of dynamic selection and implementation of other modules.