The second method , known as event - driven processing , is more efficient but also more complex to implement 第二种方法(称为事件驱动处理)效率较高,但实现起来也较为复杂。
In the case of event - driven processing , you need a signaling mechanism to control when a particular thread should run 在事件驱动处理的情况下,需要一种发信机制来控制某一特定线程何时应该运行。
An event - driven process chain ( epc ) model for product development was discussed and a formal representation of epc presented 摘要研究了事件驱动的过程链模型及其相关概念,给出了过程链模型的形式化表达。
Then the author analyses the current situation and development trend of workflow technology . and the author also researches the workflow management system and the workflow reference model of wfmc in - depth . in the following part , the article analyses the implementation mechanism of windchill wfms , and researches the process model - epc ( event - driven process chain ) model , organization model and resource model then the author further analyses the implementation of windchill wfms with ooa , introduces the implementation of workflow engine , activity and connector of workflow , robot 本文从企业信息化的发展现状及趋势出发,分析了在制造业中积极引入pdm的必要性,并着重介绍了工作流管理系统( wfms )在pdm实施中的重要地位;对国内外工作流技术的现状及趋势进行了分析;然后对wfmc工作流管理系统及参考模型进行了深入研究;在此基础之上分析了windchill的工作流管理系统的实现机制,引入了epc过程模型,自行定义了组织模型及资源模型,并采用面向对象的分析方法进一步对windchill的wfms的实现进行了深入阐述,介绍了工作流引擎、活动、自动机、连接符等对象的实现。