基于插件技术的GIS Server架构模型的设计

为了提高地理信息系统(geographic information system, GIS) Server的稳定性、易开发性和扩展性，提出基于插件技术多进程模式GIS Server的解决方案.服务器模型由进程调度管理模块和执行进程组成，利用资源分配解决多用户并发操作的问题.按照执行功能作用，服务器模型分为服务层、GIS操作层、用户管理层、执行进程和地图文档层5个模块.在实现方面，根据服务器响应请求的流程将功能实现的过程分解，提出功能插件化的设计思想，使其与服务器相对独立.该模型实现了负载均衡，运行更加稳定，采用插件和Web Service技术开发应用功能，更加简单高效. 

Design of GIS Server Model Based On Plug-in Technology

A solution of GIS Server in multi-process mode based on Plug-in technology is introduced in this paper to make it much steadier, and more convenient for extending. The server model is constituted with scheduler and management module and exe process, and solves the problem of simultaneous operations by multi-users with the method of assigning data resources. According to executive functions, the model is divided into five sub-modules in detail: server management level, operation level, user management level, exe process and map level. In the aspect of function realization, the author splits the process of executing functions based on the flow of responding the requests, and brings forward the design idea of packing the operations using plug-in technology, which makes the functions independent of server. This model achieves the balance load so that the server can run more steadily, and develops the applications more efficiently with plug-in technology and Web Service technology.