摘要： 介绍了COM的可连接对象技术和对复合事件的识别过程，给出了在可连接对象技术基础上进行改进和扩展的EFL事件模型，并且在其中加入了对复合事件的支持，此外还阐述了利用XML对事件进行表述的方法。介绍了基于EFL构件模型的反射式中间件PURPLE，并着重说明了EFL事件机制在PURPLE环境监测和自适应过程中的应用。

关键词: 可连接对象, 复合事件, 反射式中间件, 事件模型, 订阅

Abstract: This paper gives introduction to connectable object technology of COM and the recognition of composite events. Then EFL event model, which improves the infrastructure of connectable object technology with advanced features and extensions is described. The model is designed to support the recognition of composite events, and XML-based description of complicated relation of events is adopted in the subscription of composite event. Reflective middleware PURPLE, based on EFL, is reflective middleware architecture. The application of EFL event model in PURPLE during the process of environment detection and self-adaptation is also presented.

Key words: Connectable object, Composite events, Reflective middleware, Event model, Subscription

中图分类号: 

• TP311