Business Rules-driven Component-based Database Application System Design

In recent years, database technology has been developed greatly. However, for big database application, the business logic is highly complex and the business environment is very unconstant. So the traditional structural analysis is hard to meet with the demand of application. Object-oriented analysis(OOA) is better, but still exists some question such as short of standard of abstracting object and difficult in practice. In this case, one operable database design method is expected. KJNGONIS is a big database application produced by GDUT and Kingo Ltd.. This system is composed by eight subsystems. Among the way of design and analysis, we adopted a hybrid method. Recognise and abstract entity objects, event objects and process objects while having the business mles(BR) as the guide, construct the database application model with the whole consideration. This method can reveal the dynamic interaction properties of system composite units more thoroughly and make object specification and abstraction more formally. Besides, we also give a discuss on the rules mapping object-oriented data model to relational database and the response machanism of simulating object-oriented technology by store procedure and trigger. At the end, we use componentware to implement the application, not only reducing the workloads, but also gaining better maintainability and extensibility. This paper brings forward the BR-driven object-oriented design method and componentware executing pattern, having both the advantage of object-oriented technology and the ripeness of traditional method, easy to be operated in the database application.