Abstract: To realize the building and controlling of workflow patterns involving multiple instances, a solution was proposed from the perspective of network partition. The implementing method was discussed based on RTWD net proposed by HU Fei-hu, et al. in Patent China 201010114083.9. First, the sub-workflows involving multiple instances should be divided into a subnet. Then the related parameters of multiple instances were defined, and multiple instances were controlled based on it. The paper discussed the controlling of sequential, synchronous and asynchronous parallel workflow patterns involving multiple instances based on the method. Because the divided subnet keeps consistent with the definition of workflow model, multiple instances can be scheduled by original workflow engine, which simplifies the realization of multiple instance patterns.

Key words: workflow, multiple instances, network partition

摘要： 为了解决工作流多实例模式的问题，从网络划分的角度提出了一种解决方案，并以RTWD网工作流模型为基础，讨论了相关实现方法。该方法首先将包含多实例的工作流部分划分成一个子网，然后基于子网进行多实例的参数定义和运行控制。由于该划分方法与原工作流模型保持一致，可用原工作流引擎进行调度，从而大大简化了多实例工作流模式的实现。论文还基于该方法简单讨论了串行、同步并行、异步并行等多实例模式，验证了该方法的有效性。