The Oodbms Onet Overall Design And The Client Runtime To Achieve

This dissertation is about background, structure design of ONet System, an object orient database management system. It also includes the detail design of the client runtime library of ONet. At last, it gives out the future direction of ONet System.As the development of object orient technology, object orient databases are widely used in many fields. They are GIS, IDSS, Internet database, content management and so on. This is the background of ONet system.Firstly, the dissertation writes about the functionality of object oriented database management system. It summarizes the characteristics of an OODBMS. These characteristics include objects, methods, inheritance, class library, durability, query, query optimization, integrity, concurrency, performance and schema modification.In chapter 3, the article gives out the structure design of ONet system. First of all, it introduces ONet system. Then it shows the structure map of the system, followed with two key technology of ONet system, the client/server structure and object components.Chapter 4 is the detail design of the client runtime library of ONet system. The client runtime library is divided into three layers: communication layer, service layer and API layer. There are detail specifications about these three layers in this chapter. The ONet client has an asynchronous communication layer with multi-thread support. The service layer is rather complex for the support of object oriented and database characteristics. To the developer of ONet applications, client library provides the ODMG 3.0 compliant API layer.Finally, the author summarizes the development of ONet system and points out the future direction of the system.