中间件平台的反射技术

Reflection Technique in the Middleware Architecture

当前的中间件系统缺乏灵活性和适应性,难以适应环境改变和不同用户需求。反射机制提供了系统所需灵活性和适应性的理论方法,而对元信息的表示和管理是实现反射机制的关键。首先介绍了反射机制的原理;然后重点阐述了对元信息的管理,给出了关于元信息管理的现有标准;最后给出一个服务质量(QoS)管理的构架模型,并提出了中间件领域所面临的一些挑战。

Facing the changing environment and different user requirement, current middlewares lack flexibility and adaptability.Reflection provides a principled means to achieve the flexibility and adaptation required, and the representation and management of metainformation is an important issue in the reflective architectures.In this paper we introduce the reflection mechanism,and then focus on the management of metainformation with some existing standards.The paper also presents an architecture for the area of Quality of Service(QoS) management as well as some challenges ahead.