中间件

中间件中间件(Middleware)是处于操作系统和应用程序之间的软件,也有人认为它应该属于操作系统中的一部分。人们在使用中间件时,往往是一组中间件集成在一起,构成一个平台(包括开发平台和运行平台),但在这组中间件中必需要有一个通信中间件,即中间件=平台+通信,这个定义也限定了只有用于分布式系统中才能称为中间件,同时还可以把它与支撑软件和实用软件区分开来。消息中间件(MOM:Message-Oriented Middleware)数据中间件(Database Middleware)远程过程调用中间件(RPC:Remote Process Call)对象请求代理中间件(ORB:Object Request Broker)事务处理中间件(TP Monitor:Transaction Process Monitor)J2EE中间件分布式软件系统:1.不同的模块运行在不同的物理位置2.并行处理同一个请求

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