活动多实例工作流中数据流的建模与调度  

Modeling & Scheduling of Data Flows in Workflow of Activity Instances

作　　者：干哲[1] 陈敏[2] 汤晓安[1] 马伯宁[1] 孙茂印[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,长沙410073 [2]国防科学技术大学航天与材料工程学院,长沙410073

出　　处：《计算机辅助设计与图形学学报》2008年第5期637-644,共8页Journal of Computer-Aided Design & Computer Graphics

基　　金：国防科工委基础科研项目

摘　　要：根据数据流模型的特点定义了数据流元模型,创建了能够准确描述活动间细粒度接口数据交互的数据流二步建模法,并为其提供了一种图形表示;扩展传统工作流引擎,提出了活动多实例工作流中数据流的调度策略,以及根据数据一致性验证准则实现了数据准备、数据提交等关键调度算法,进而提出的虚拟活动实例概念解决了活动实例数据多版本的管理问题.最后通过应用实例对文中的理论进行了验证.According to the characteristics of data flow model, a data flow meta-model is defined and a graphical two-step modeling method of data flows is presented, which can exactly describe interactions among fine-grained interface data between activities. Through extension of the traditional workflow engine, scheduling policy of data flows in workflow of activity instances is presented, and the key scheduling algorithms are realized according to the validation rule of data consistency, such as data preparation and data submission. The concept of virtual activity instances resolves the scheduling problem of versions of activity instance data. At last, the method is validated by the example.

关 键 词：工作流 数据流 活动多实例 建模 调度 一致性 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]