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Web服务组合的服务编制过程需要遵守服务编排协议.针对将服务编排协议映射到分散式服务编制这一难点问题,提出了面向角色的WS-CDL映射模型,建立了服务编排协议的行为模型;给出了服务编排协议的行为模型的角色映射规则及实现算法.该模型符合分散式服务编制由各个成员服务独立处理交换信息的特点,通过引入角色映射这一中间环节,解决了因WS-CDL和BPEL在语法上不具有一一对应关系而无法完全直接转换的问题.最后,给出了面向角色的服务编排协议映射的实例分析过程,并通过开发的原型系统,验证了映射规则的正确性和算法的可实现性.
The service compilation process of Web service composition needs to obey the service orchestration protocol.Aiming at the difficulty of mapping the service orchestration protocol to the distributed service compilation, a role-oriented WS-CDL mapping model is proposed and the behavior model of the service orchestration protocol is established. The role mapping rules and the implementation algorithm of the behavior model of service orchestration protocol are proposed. The model is in accordance with the characteristics of decentralized service compilation and information processing independently processed by each member service. By introducing the intermediary of role mapping, BPEL does not have a one-to-one correspondence between syntax and can not be directly converted directly to the problem.Finally, this paper gives a case-based analysis of role-oriented service orchestration protocol mapping, and verifies the correctness of the mapping rules by the developed prototype system The feasibility of the algorithm.