DAEF工作集管理函数的实现

Implementation of the DAEF workset functions

为了保证数据仓中数据的安全 ,POSC在DAEF中定义了工作集管理函数 ,而在POSC的样本实现中 ,却没有给出这些函数的具体实现 .分析了Epicentre模型在Oracle上的投影技术 ,用G ++作为开发工具 ,采用面向对象的编程方法 ,开发了实现相应功能的类和一批辅助函数 ,包括工作集的创建、实例句柄的增加、实例句柄的删除、以及工作集的删除等函数 ;实现了满足POSC规范的工作集管理函数 ,完善了POSC提供的DAEF样本实现的功能 .

The workset functions are defined by POSC in the DAEF for the safety of data store. The functions aren't programmed in the DAEF sample implementation of POSC. In this paper, we analyzed the projecting technique of Epicentre model on Oracle. According to the standard of POSC by the object\|oriented method with the G++ development tool, we developed some relative classes and assistant functions——creation of workset, increase of instance handle, deletion of instance handle and deletion of workset. We have implemented the workset management functions. The function of the DAEF sample implementation is developed.