Design And Implementation Of Data Exchange In Network Education System

In 2001, the Ministry of Science and Technology initialize the Network Education System as the tenth five-year plan. The system provides convenience and high efficiency for open remote education. Thus, a straight and reality problem comes, how to provide wide-range coordinate work in depth among diversity application systems. As the base of depth coordinate work, the coordinate in the data layer behavior more important, especially when new application become more popular, the problem that how to dig information in the legacy system and applied it in the different application system become emergency important. Hereby , from improving the scalability and QoS of Network Education System, we think it is necessary to research the related theory and technology of data exchange. The data exchange technology of high performance make the exchange between isomerous system become true, and therefore, to form a distributed and scalable network.This paper focus on the research and design of data exchange among the applications of network education system, take into account of the complexity of coupling relation between the applications in the network education system. This paper come up with a solution based on EJB and XML technology to this problem, and successful applied it in integration of the network education system.The detailed work including:Given fully consideration to the mainly data access control and data exchange technology, and propogate a network education data exchange system application framework based on the J2EE platform. And also define the interface among the key technologies and data exchange system.Based on research of current data exchange technology, and from the scalability, maintainability point of view,design and realize the two components of network education data exchange system---Archive Information Mangement Service and Course Resource Transoform Service.Based on the real appraise model, adopt standardlize testing tools LoadRunner to test the key component of data exchange system. From the testing result, we got an expecting effect. The testing result also build a ideal fundamental to improve the peroformance of service.Make full use of association rule mining in data mining, setup a EJB instance pooling algorithm based on the association rule mining. This algorithm give full consideration of EJB instance association and bring a full fresh idea to instance pooling.