基于角色的主体服务动态协调机制研究

面向服务体系结构（Service—Oriented Architecture，SOA）下的协同应用越来越趋向高度异构、动态和不断重新配置的情形，要求参与主体能够动态调整它们的服务，以适应协作环境和系统需求的变化。利用角色思想将主体的业务服务以一种粗粒度方式进行组合，提出一种快速、方便的角色近似匹配方法，重点研究了通过转换主体的扮演角色未实现服务动态调整的机制，并给出一个应用实例，仿真实验和定性分析表明基于角色方法大幅度提升了服务的质量和复用度，改善了主体对环境的适应能力，提高了协同活动的执行效率。

A Role-Based Research on Dynamic Agent Service Coordination Mechanisms

Collaborative applications with a service-oriented architecture tend to be highly heterogeneous, dynamic, and flexible. This situation demands the participants adjust their services dynamically to adapt the changes of cooperative environments and their requirements. A role concept was used to compose the business services of agents in a large-granularity approach. Then, a fast and convenient role matching approach was proposed and the mechanism was explored to implement the service coordination dynamically through playing different roles by agents. Further more, a practical example is shown to demonstrate this approach. The result of the experiment and the qualitative analysis represent that role-based approach promotes the quality and degree of service reuse greatly. This mechanism improves the ability that agents adapt the environment and proves the execution efficiency of cooperation activities.