采用双层协调机制的服务社区模型

Service community model for 2-layer orchestration mechanism

Web服务的动态组合技术作为有效实现服务增值功能的重要方法已成为业界研究和发展的焦点,纵观已有的研究成果,其协调机制可分为集中和分散两种。但实际应用中,这两种机制都存在不足。针对这一问题,提出了一种采用双层协调机制的服务社区模型,并讨论了该模型的体系结构、注册原理、发现算法、替换规则等问题,最后与传统模型进行对比分析。结果表明,这种采用传统集中和分散相结合协调机制的模型,将UDDI分层设计与管理,可以更好地支持存储和管理资源;社区的内部自治性有利于提高服务发现和替换的效率,从而更有效地支持Web服务的动态组合过程。

It has been widely recognized that web service composition is an important method of implementing services increment efficiently. Service composition has become the focus of research and development, which may be orchestrated either using a centralized engine or in a decentralized fashion. But in fact, both of two have some defects. A service community model for 2-layer orchestration mechanism is proposed, and the architecture of community and registration principle and discovery arithmetic and replacemeut strategy is analyzed. By designing and managing UDDI hierarchically, this model is a natural means to support sharing, accessing and managing resources and heightens the efficiency of service discovery and replacement, so that it can support the process of dynamic service composition based on decentralized mechanism more efficiently.