Design And Research On The Middleware Of Relational Data Sharing Based On Directory Service System

With the development of the information, the various trades and occupations build a lot of mutually independent information services and management systems according to their specific business and needs. With the passage of time and technological progress, these sysytems lead to "information isolated island" formation.Relational data are usually processed with serious design and therefore are of more important, which is one of the valuable resources in society of information. Such as, the significance of sharing massive relational data among a huge number of users is self-evident. However, because of practical difficulties on information discovery, heterogeneity, security and so on, users can not access those data from a relational database management system directly through the Internet or Web. So, sharing of relational data in a wide rage became the new problem of the current informational construction.The present situation, development and the main problem overview of the sharing of relational data at home and abroad are analyzed in this paper firstly. Then the Middleware technology, the Web Service technology, the Directory Service technology are researched. Meanwhile their applications in sharing of data are discussed.Based on the relational data system architecture and its details of the hierarchical model research, the paper studies the entire domain of the data model and organizational forms of services model. Then the paper gives the design thought of middleware on RDSA and it's mainly thought problem.Also, the paper focuses on analysing the impact of information services on the registration mechanism for the discovery process of development and its existing problems. Furthermore, based on the UDDI, the paper expand the fuction of regularly monitoring and classification, then tests the performance of information availability, efficiency, real-time aspects of the validity in the course of information discovered.Finally, the paper deeply studies the information security impact of identity management system on shared middleware, gives the unity identity management based on a single sign-on system. Then the paper designs the identity authentication system and authorization system suitable for data-sharing middleware in accordance with the characteristics of relational data structure, and tests its function.