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.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
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
关键词
工作流
数据流
活动多实例
建模
调度
一致性
workflow
data flow
activity instances
modeling
scheduling
consistency
