业务流程驱动的半自动语义Web服务组合方法研究及应用

发布时间：2019-07-27 13:08

【摘要】：随着Web服务数量的不断增多,如何利用Web服务组建松散耦合的应用系统以满足不断变化的业务需求,成为一个研究热点。传统的业务流程驱动的服务组合通常需要预定义组合流程,当业务流程改变时则需重新定义流程,因此不能适应动态业务需求。针对上述问题,提出了一种业务流程驱动的半自动语义Web服务组合方法。该方法在业务流程驱动的服务组合基础上,将局部动态流程用抽象服务描述,当流程执行阶段不存在能满足抽象服务需求的单个服务时,采用自动服务组合方式将抽象服务替换成组合服务,并执行自动组合方法。该方法由于采用了基于回溯树的服务组合方法,并在回溯树中增加语义信息,还通过计算组合流程的QoS来实现组合服务的选取,因此能有效解决因缺乏语义导致查全率低的问题。最后给出了半自动化的服务组合框架,该框架兼顾了可用性与动态性的需求,具有一定的实用价值。
[Abstract]:With the increasing number of Web services, how to use Web services to build a loose coupling application system to meet the changing business needs has become a research focus. Traditional business process-driven service composition usually requires predefined composite processes. When the business process changes, the process needs to be redefined, so it can not meet the dynamic business requirements. In order to solve the above problems, a semi-automatic semantic Web service composition method driven by business process is proposed. Based on the service composition driven by business process, the local dynamic process is described as abstract service. When there is no single service that can meet the requirements of abstract service in the process execution phase, the abstract service is replaced with composite service by automatic service composition method, and the automatic composition method is executed. Because this method adopts the service composition method based on backtracking tree and adds semantic information to the backtracking tree, it also calculates the QoS of composition process to realize the selection of composite services, so it can effectively solve the problem of low recall caused by lack of semantics. Finally, a semi-automatic service composition framework is given, which takes into account the requirements of availability and dynamics, and has certain practical value.
【作者单位】：浙江工业大学计算机学院;
【基金】：浙江省重点科技创新团队(2009R50009) 重大科技专项重大工业项目(2012C11026-2)资助
【分类号】：TP393.09

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