全局优化的分层动态Web服务组合

摘要

Optimization and selection of services are one of the key problems in dynamic Web service composition.It models the Web services with the help of the production and interface semantic rules, and develops a hierarchical algorithm containing global optimization.By introducing QoS performance metrics about services selection and user requests multi-constraint on response time, cost, success rate, reliability and composability, it simulates the proposed algorithm based on Weblogic 8.1 application server and Oracle BPEL Process Manager 10.The simulation experiments show that the algorithm has better effect on improving the rate of success and composition in dynamic Web services.%优化选取服务是动态 Web 服务组合的关键技术之一.在对分层组合算法研究的基础上,利用产生式规则和接口语义规则对 Web 服务建模,引入了备选服务的 QoS 性能指标和用户请求对响应时间、成本、成功率、可靠性和组合率的多条件约束,给出了一种全局优化的分层动态 Web 服务组合算法,通过仿真工具 Weblogic 8.1 application server + Oracle BPEL Process Manager10 验证,结果表明,该算法能够有效提高动态 Web 服务组合的成功率和组合率.