针对BPEL(Business Process Execution Language)流程中出现的数据竞争和死锁问题,提出了一种基于图理论的检测方法.首先把BPEL流程转化为BPEL片段图,然后通过求BPEL片段图中强连通分量的方式判定流程是否存在死锁;通过求BPEL片段图中...针对BPEL(Business Process Execution Language)流程中出现的数据竞争和死锁问题,提出了一种基于图理论的检测方法.首先把BPEL流程转化为BPEL片段图,然后通过求BPEL片段图中强连通分量的方式判定流程是否存在死锁;通过求BPEL片段图中节点间的可达性以判定节点间的可并发性来检测流程中的数据竞争.该方法采用约束求解技术对BPEL中的变迁条件和联合表达式进行分析,提高了检测的准确性.实际应用结果表明,该方法可以检测出流程中的数据竞争和死锁,提高流程的可靠性.展开更多
This paper proposes a method of data-flow testing for Web services composition. Firstly, to facilitate data flow analysis and constraints collecting, the existing model representation of business process execution lan...This paper proposes a method of data-flow testing for Web services composition. Firstly, to facilitate data flow analysis and constraints collecting, the existing model representation of business process execution language （BPEL） is modified in company with the analysis of data dependency and an exact representation of dead path elimination （DPE） is proposed, which over-comes the difficulties brought to dataflow analysis. Then defining and using information based on data flow rules is collected by parsing BPEL and Web services description language （WSDL） documents and the def-use annotated control flow graph is created. Based on this model, data-flow anomalies which indicate potential errors can be discovered by traversing the paths of graph, and all-du-paths used in dynamic data flow testing for Web services composition are automatically generated, then testers can design the test cases according to the collected constraints for each path selected.展开更多
In order to support just-in-time reconfiguration of business process execution language （BPEL） process, a template-based mapping method is proposed to map business level process to BPEL process. The method builds up...In order to support just-in-time reconfiguration of business process execution language （BPEL） process, a template-based mapping method is proposed to map business level process to BPEL process. The method builds up mapping relationships between the key points of business level process and BPEL process, which helps users to adjust the business level process with simplified operations, and automatically maps the changes to BPEL. In addition, a case of the application of the method in a clothing enterprise was illustrated.展开更多
基于人工智能规划的服务组合算法得到的组合方案是一种层次化服务流程(layered service process,LSP),由服务之间的数据流(而非传统块结构流程中的控制结构)加以驱动执行。为使该类服务流程能在业务过程执行语言(business process execu...基于人工智能规划的服务组合算法得到的组合方案是一种层次化服务流程(layered service process,LSP),由服务之间的数据流(而非传统块结构流程中的控制结构)加以驱动执行。为使该类服务流程能在业务过程执行语言(business process execution language,BPEL)引擎上直接执行,研究了将LSP转换为BPEL的方法,追求BPEL执行效率的优化。给出了LSP的形式化模型,分析了将LSP转换为BPEL的3种策略(完全拆分、按层拆分、按块拆分),定性对比了三者之间的性能优劣。针对按块拆分策略,提出了9条规则用于对LSP的拆分,提出了块拆分算法和块合并算法。通过一个LSP案例对转换过程进行了演示,并通过实验证实了该转换方法可以获得比其他转换策略性能更好的BPEL。展开更多
设计并实现了一个基于业务流程执行语言(business process execution language,BPEL)的网格工作流管理系统.针对满足网格环境中的特殊需求,如状态的交互、动态服务绑定、高吞吐量和可扩展性、界面友好的工作流定义工具等,分别提出了BPEL...设计并实现了一个基于业务流程执行语言(business process execution language,BPEL)的网格工作流管理系统.针对满足网格环境中的特殊需求,如状态的交互、动态服务绑定、高吞吐量和可扩展性、界面友好的工作流定义工具等,分别提出了BPEL与Web服务资源框架(Web service resource framework,WSRF)整合方法、BPEL的简单集群架构和面向应用组件的工作流定义等.最后,给出了在中国教育科研网格公共支撑平台(ChinaGrid supporting platform,CGSP)中网格工作流系统的原型实现.实验结果表明,原型系统支持负载均衡是正确、可行和有效的.展开更多
WS-BPEL （Web Service Business Process Execution Language）, as an emerging workflow standard, provides a simple and effective way to construct Web Services-oriented workflows. However, to the best of our knowledge, f...WS-BPEL （Web Service Business Process Execution Language）, as an emerging workflow standard, provides a simple and effective way to construct Web Services-oriented workflows. However, to the best of our knowledge, few effort from the industry and academia has addressed the dynamic change problems of BPEL process. This paper proposes a reflective approach to solve this problem. In this paper, a formal meta-object model of process instance is defined; the behavioral consistency criterion based on this model is proposed; a set of modification primitives are given to modify the meta-object while keeping the change atomic and consistent; and in addition, the MOP is offered to provide the programming interfaces for dynamic BPEL process change.展开更多
文摘针对BPEL(Business Process Execution Language)流程中出现的数据竞争和死锁问题,提出了一种基于图理论的检测方法.首先把BPEL流程转化为BPEL片段图,然后通过求BPEL片段图中强连通分量的方式判定流程是否存在死锁;通过求BPEL片段图中节点间的可达性以判定节点间的可并发性来检测流程中的数据竞争.该方法采用约束求解技术对BPEL中的变迁条件和联合表达式进行分析,提高了检测的准确性.实际应用结果表明,该方法可以检测出流程中的数据竞争和死锁,提高流程的可靠性.
基金the National Natural Science Foundation of China(60425206, 60503033)National Basic Research Program of China (973 Program, 2002CB312000)Opening Foundation of State Key Laboratory of Software Engineering in Wuhan University
文摘This paper proposes a method of data-flow testing for Web services composition. Firstly, to facilitate data flow analysis and constraints collecting, the existing model representation of business process execution language （BPEL） is modified in company with the analysis of data dependency and an exact representation of dead path elimination （DPE） is proposed, which over-comes the difficulties brought to dataflow analysis. Then defining and using information based on data flow rules is collected by parsing BPEL and Web services description language （WSDL） documents and the def-use annotated control flow graph is created. Based on this model, data-flow anomalies which indicate potential errors can be discovered by traversing the paths of graph, and all-du-paths used in dynamic data flow testing for Web services composition are automatically generated, then testers can design the test cases according to the collected constraints for each path selected.
基金the National High-Technology Research and Development Program of China (863 Program) (2006AA04Z158, 2006AA01A106)the National Basic Research Program of China (973 Program) (2005CB 321807, 2007CB310805)
文摘In order to support just-in-time reconfiguration of business process execution language （BPEL） process, a template-based mapping method is proposed to map business level process to BPEL process. The method builds up mapping relationships between the key points of business level process and BPEL process, which helps users to adjust the business level process with simplified operations, and automatically maps the changes to BPEL. In addition, a case of the application of the method in a clothing enterprise was illustrated.
文摘基于人工智能规划的服务组合算法得到的组合方案是一种层次化服务流程(layered service process,LSP),由服务之间的数据流(而非传统块结构流程中的控制结构)加以驱动执行。为使该类服务流程能在业务过程执行语言(business process execution language,BPEL)引擎上直接执行,研究了将LSP转换为BPEL的方法,追求BPEL执行效率的优化。给出了LSP的形式化模型,分析了将LSP转换为BPEL的3种策略(完全拆分、按层拆分、按块拆分),定性对比了三者之间的性能优劣。针对按块拆分策略,提出了9条规则用于对LSP的拆分,提出了块拆分算法和块合并算法。通过一个LSP案例对转换过程进行了演示,并通过实验证实了该转换方法可以获得比其他转换策略性能更好的BPEL。
文摘设计并实现了一个基于业务流程执行语言(business process execution language,BPEL)的网格工作流管理系统.针对满足网格环境中的特殊需求,如状态的交互、动态服务绑定、高吞吐量和可扩展性、界面友好的工作流定义工具等,分别提出了BPEL与Web服务资源框架(Web service resource framework,WSRF)整合方法、BPEL的简单集群架构和面向应用组件的工作流定义等.最后,给出了在中国教育科研网格公共支撑平台(ChinaGrid supporting platform,CGSP)中网格工作流系统的原型实现.实验结果表明,原型系统支持负载均衡是正确、可行和有效的.
基金the National Natural Science Foundation of China(60473066, 60773006)the National High Technology Research and Development Program of China(863 Program)(2006AA012168)
文摘WS-BPEL （Web Service Business Process Execution Language）, as an emerging workflow standard, provides a simple and effective way to construct Web Services-oriented workflows. However, to the best of our knowledge, few effort from the industry and academia has addressed the dynamic change problems of BPEL process. This paper proposes a reflective approach to solve this problem. In this paper, a formal meta-object model of process instance is defined; the behavioral consistency criterion based on this model is proposed; a set of modification primitives are given to modify the meta-object while keeping the change atomic and consistent; and in addition, the MOP is offered to provide the programming interfaces for dynamic BPEL process change.
