一种基于约束的事务工作流并发控制方法  

Concurrency Control Method Based on Constraint in Transactional Workflow

作　　者：刘慧[1,2] 王宁[1] 刘元元[1] 韩晓琼[3] 

机构地区：[1]中国科学院沈阳计算技术研究所,沈阳110168 [2]中国科学院研究生院,北京100049 [3]北京大学信息科学技术学院,北京100871

出　　处：《计算机系统应用》2011年第12期181-184,共4页Computer Systems & Applications

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07528-006-05)

摘　　要：在辽河流域水环境管理中,许多业务流程操作都满足事务的特性。传统工作流系统中并发控制的实现主要是依据对共享数据项的存取控制,当用来处理事务工作流时会影响系统的效率,因为有的业务流程可能持续的时间比较长,这样它对共享数据项的占有时间就会很长而导致其他流程不能继续流转。为解决这一问题,借助类似于处理器中指令流水的思想研究了一种事务工作流的并发控制方法,并在此基础上建立了总体设计模型,借助并发控制器和任务管理器来高效调度工作流。在保证工作流执行正确的前提下,引入约束的概念来实现事务工作流的并发控制,从而提高系统的性能和效率。Many business process operations are transactional workflow in LiaoHe River water environmental management system. In the traditional workflow system, concurrency control mainly based on the realization of accessing control on the shared data, using it process the transactional workflow would affect the efficiency of the system when some business process operations sustained for a long time. In this case, these processes hold the shared data for a long time, so other processes must wait. To solve the problem, this paper uses a similar thought of instructions pipelining in the processor to research a method of concurrency control on transactional workflow, and based on it the general design model is given. The workflows are highly scheduled wth the help of concurrency controler and the task manager. In the premise of the correct execution of workflow, the concept of constraint is introduced for the purpose of the concurrency control of transactional workflow, thereby the performance and efficiency of the system has improved.

关 键 词：事务 事务工作流 并发控制 约束 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]