Research And Implementation Of Web Services System Based On P2P

Web service is one of the most important technical solution of e-commerce and the hot spot of development of the Internet. Its advantages, such as open, simple and cross-platform have drawn lots of related researchers and application developers'attention. The mechanism of releasing and retrieval of traditional Web service is based on a mechanism of centralized registry. This mechanism will bring about many problems. Taking performance as an example, along with the increasing number of releasing and retrieval of Web Service, there will need lots of Web service registry to handle the increasing amount of data which makes the performance bottlenecks highlighted. On another hand, Web services registry would lead to a problem of failure of single point throughout the system easily, which would block the normal process of releasing and the discovery of Web Service and at last would lead to the collapse of the whole Web services architecture; in terms of performance,. The deficiency of Web services architecture had restricted the further development of Web services to a certain extent.Concerning with problems of robustness and performance bottlenecks in current C/S model of Web services, the graduation paper focus on to combine P2P and Web Service.Achieving publishing and searching of Web Service though P2P technologies and bring in the mechanism of trust evalution of Web Service in P2P environment. Main task of this graduation paper focused on how to bring the advantage of flexibility of P2P network into the use of Web services framework which would allow a more flexible distribution of service and using various services on different network systems, breaking the boundaries between the traditional Web networks and P2P networks. The main task consist of to build underlying P2P network platform and to design and develop the architecture of Web service model based on the underlying P2P platform. Achieving results will be a prototype system of lightweight Web services discovery platform based on a peer network.As Web services become the dominant next-generation Web technology, the design plan of the model of this graduation can solve the problem of robustness and performance bottlenecks in traditon Web services. In the architecture of P2P-based Web services, services will distribute in every node in the system so that the failure of single node on the system would have limited impact. Each node in system will have addressability that increases the system resource utilization. And this model brings into a mechanism of trust evalution of Web Service in P2P environment which could distinguish some malice behaviories effectively. With the combination of P2P and Web Service becomes more and more perfect, it will help to expand the size of Web services. and promote the development of Web services further.