分布式组件对象模式DCOM的研究及应用

Study and application on the distributed component object model

:DCOM(分布式组件对象模式 )是COM的扩展 ,它可以支持不同计算机上组件对象间的相互作用 ,这些计算机既可以在 1个局域网内 ,也可以在Internet上 对于客户程序而言 ,组件的位置是透明的 ,真正实现了COM的无缝扩展 基于DCOM的分布式应用程序可以做到动态负载平衡 ,并通过DCOM内部客户端缓存机制来优化网络的来回旋程 在研究过程中开发了 1个DCOM应用实例———电子白板 ,支持多人同时在线 ,多个客户端书写器可以通过网络在不同的主机上同时交互式地使用画笔通信 ,将其嵌入多信道讨论中 ,可以弥补多信道讨论只对文本处理而带来的局限性 ,讨论者可以通过画板来形象地表达一些难以用语言来描述的问题 主要阐述了DCOM的基本工作机制 。

DCOM is the extension of COM technology, which can support components working with each other in different computers, which are not only on the Intranet but also on the Internet. To client programs, the position of components is transparent. Thus it has really implemented the seamless extension of COM technology. The distributed application which is based on DCOM technique can dynamically load balance and optimize Network Round Trips through DCOM's internal chache mechanism. During researching, an electronic whiteboard has been developed as a part of multi tunnel discussing to describe things more audio visually and the DCOM technology has been used as the key tech.