【摘要】 组合现有的Web服务是为了能快速地开发复杂的Web服务。介绍了几种常见的Web服务组合方法,并根据4种关键需求(连通性、非功能服务质量属性、正确性、可伸缩性)对它们加以比较。提出了一种基于软件体系结构描述语言XYZ/ADL的Web服务组合形式化描述方法,由XYZ/ADL定义描述Web服务的组件、组件之间交互的连接件以及建立组件和连接件实例联系的配置,最后结合一个实例描述Web服务组合的工作方式。更多还原

【Abstract】 The technology of composing the existing Web services is to fast explore the complex Web Services.In this paper,several familiar service composition methods are described and compared by the four key requirementconnectivity,nonfunctional quality-of-service properties,correctness and scalability.A formal specification method of Web service composition based on software architecture description language XYZ/ADL is introduced.XYZ/ADL defines the components describing Web services,connectors describing the interaction between components and configurations setting up the relations between instances of components and connectors,and finally describes the usability of this Web services composition method combined with an example.更多还原