基于扩展UML活动图的工作流异常处理过程  

Process of workflow exception handling based on extended UML activity diagram

作　　者：白红梅[1] 谢益武[1] 

机构地区：[1]大连海事大学信息科学技术学院,辽宁大连116026

出　　处：《计算机应用》2011年第1期277-280,285,共5页journal of Computer Applications

摘　　要：在UML活动图上实现工作流异常处理功能,避免工作流无故中断,影响工作流的运行。扩展了UML活动图,增加了结构单元和功能单元,保证工作流执行语义一致性的同时,不但限制了异常恢复范围而且还能自动设置恢复点;提出T型工作流恢复算法,该方法本着同层恢复、向外扩散的原则,将恢复粒度上升到单元级别。实验结果证明,该算法是可行的,不但可以通过为各种单元设置补偿任务而减少各活动节点补偿任务的执行,还避免了对执行历史的维护。In order to realize the exception handling of workflow in UML activity diagram and avoid interruption which influences the running of workflow, this extended paper UML activity diagram firstly and adds the concepts about structural unit and functional unit. They ensure the consistency of workflow execution semantics. Meanwhile, they restrict recovery range and set recovery point automatically. Then a new method called T-workflow recovery strategy was proposed, which could base the principle of recovering the same layer and spreading and set recovery size to unit level. The results of experiment show that this method is feasible. It does not only reduce the execution of compensation task of every activity node by setting up the compensation tasks for different units, but also avoid maintaining to the executive history.

关 键 词：UML活动图 结构单元 功能单元 恢复 工作流异常 

分 类 号：TP311.5[自动化与计算机技术—计算机软件与理论] TP301.6[自动化与计算机技术—计算机科学与技术]