In order to settle the problem of workflow data consis-tency under the distributed environment, an invalidation strategy based-on timely updating record list is put forward. The strategy adopting the method of updatin...In order to settle the problem of workflow data consis-tency under the distributed environment, an invalidation strategy based-on timely updating record list is put forward. The strategy adopting the method of updating the records list and the recovery mechanism of updating message proves the classical invalidation strategy. When the request cycle of duplication is too long, the strategy uses the method of updating the records list to pause for sending updating message; when the long cycle duplication is requested again, it uses the recovery mechanism to resume the updating message. This strategy not only ensures the consistency of the workflow data, but also reduces the unnecessary network traffic. From theoretical comparison with those common strategies, the unnecessary network traffic of this strategy is fewer and more stable. The simulation results validate this conclusion.展开更多
随着业务领域和网格技术的发展,以应用网络服务的活动为主构成的服务工作流得到广泛重视和使用。服务工作流的数据流建模必须考虑服务的实现方式和人工活动对文件传输的需求。提出基于XML和事件驱动的数据和数据流模型,分析利用XSLT(Ext...随着业务领域和网格技术的发展,以应用网络服务的活动为主构成的服务工作流得到广泛重视和使用。服务工作流的数据流建模必须考虑服务的实现方式和人工活动对文件传输的需求。提出基于XML和事件驱动的数据和数据流模型,分析利用XSLT(Extensible Stylesheet Language Transformations)进行XML、HTML的转换以实现服务和人工活动间数据传递的机制,从而克服BPEL4WS固有的在数据机制上的缺陷。同时实现了支持该模型的服务工作流系统。展开更多
基金National Basic Research Program of China (973 Program) (2005CD312904)
文摘In order to settle the problem of workflow data consis-tency under the distributed environment, an invalidation strategy based-on timely updating record list is put forward. The strategy adopting the method of updating the records list and the recovery mechanism of updating message proves the classical invalidation strategy. When the request cycle of duplication is too long, the strategy uses the method of updating the records list to pause for sending updating message; when the long cycle duplication is requested again, it uses the recovery mechanism to resume the updating message. This strategy not only ensures the consistency of the workflow data, but also reduces the unnecessary network traffic. From theoretical comparison with those common strategies, the unnecessary network traffic of this strategy is fewer and more stable. The simulation results validate this conclusion.
文摘随着业务领域和网格技术的发展,以应用网络服务的活动为主构成的服务工作流得到广泛重视和使用。服务工作流的数据流建模必须考虑服务的实现方式和人工活动对文件传输的需求。提出基于XML和事件驱动的数据和数据流模型,分析利用XSLT(Extensible Stylesheet Language Transformations)进行XML、HTML的转换以实现服务和人工活动间数据传递的机制,从而克服BPEL4WS固有的在数据机制上的缺陷。同时实现了支持该模型的服务工作流系统。
