【摘要】 单个Web服务难以满足实际应用的需求,如何组合已有的服务,形成新的服务,已成为此领域的研究热点。现在的组合方法极少考虑服务质量QoS(Quality of Service)。对于一些提供相似功能的Web服务,服务质量是判断是否选择此服务的关键因素,组合服务的质量必须满足用户的需求。本文基于SOA的服务开发思想,针对当前服务组合存在的问题,提出了一种基于QoS的服务组合方法,并给出了构建基于QoS的Web服务组合及选择最佳服务的策略,通过整合单个服务的质量以得到最终组合服务的整体最佳质量。在满足用户组合服务的功能需求的同时,也满足了用户对服务质量QoS的需求,实现了需求服务的优化。更多还原

【Abstract】 Single Web service just provides limited functionality,and can’t meet the needs in practice.How to compose existing services to form new services has become an important research in Web service domain.Current composition method seldom considers Quality of Service(QoS).For some services of providing similar functionality,QoS is key factor in deciding whether a service should be selected.Composite service must meet requirements of consumer for QoS.To improve the situation,based on SOA,this paper presents a new composition strategy considering QoS,by introducing the property of quality of single service so as to obtain final optimization of whole service in quality.How to select optimal service and how to construct QoS-based composition is described in details in the paper.Such service can not only meet the requirement in functionality but also QoS property,and it realizes service optimization.更多还原