通过协同模型取得分布式系统的适应性

Achieving Distributed System Adaptability with Coordination Model

针对分布式系统中自治实体的交互行为和实时约束行为动态变化的问题,提出了一个具有动态性、实时性的协同模型.在该模型中,利用关注点分离思想,从传统自治实体中分离出两类不同的活动实体,即负责完成实时行为的时控协调器和协调活动交互的通信协调器,解决了开放分布环境下分布式系统的适应性和动态性问题.最后,利用Java消息服务技术和E JB技术实现了模型,并给出了在汽车导航系统中的一个应用实例.

The paper presents a dynamic and real-time coordination model by researching on autonomous entities, which can change their interactive behavior and real-time constrain behavior in distributed systems. The two different categories of active entities are separated from traditional autonomous entities based on the separation of concern principle, namely, temporal coordination which is responsible for accomplishing real-time behavior, and communication coordination which is to coordinate communication among activities, which solve adaptability and dynamics of distributed systems in open distributed environment. Finally, the model is implemented by using the java message service technology and the EJB technology,and an application in the car navigation system is given.