RIA技术方案下的插件式WebGIS系统架构设计

本文介绍了RIA方案下基于MVVM设计模式和MEF插件方案进行插件式WebGIS系统设计的核心思路和关键实现技术,并在"四川省山地灾害多源信息集成管理系统"开发项目中对插件式WebGIS系统架构进行了实践,取得了良好的效果。系统中各项功能被作为独立插件进行开发,然后被集中或分散部署到可访问到的任何网络位置,用户在使用时,按需对插件进行动态加载或卸载,这种松散耦合的架构方式降低了软件设计开发的难度,提高了开发效率,保障了系统的灵活、高效、稳定,为WebGIS应用程序开发提供了良好的支持。

Architecture design of plug-in WebGIS using RIA technology

This article discussed MVVM design pattern and MEF plug-in solution,which constituted key technologies of plug-in WebGIS architecture design.The architecture solution discussed in this article was practiced in Sichuan Province Geological Hazard Information Management System,and obtained good results.Facts have proved that plug-in architecture pattern provides effective support for the development of complicated and flexible WebGIS software.In RIA web application development,plug-in architecture pattern considers function modules as independent plug-in components,which can been developed separately and deployed to any Website.By on-demand asynchronous loading,the main web framework can load plug-in components dynamically and extend new functions expediently without modifying or recompiling the original application.Loosely coupled architecture pattern reduces the difficulty of software design,and increases the efficiency of system development and maintenance,and assures the flexibility,efficiency and stability of system.Plug-in architecture pattern has already become a kind of important design pattern for the development of WebGIS system.