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    6/30/2006

    系统与组件(2006-06-20)

    注:因为原来blog使用的是学校的blog服务,不是很稳定,所以迁到MSN spaces上,因此日期可能不正确,谢谢。
     
    经过这段时间的努力,系统分析和设计基本已经完成,而最重要的两个文档,系统架构设计和组件设计基本成型了。系统架构设计和组件设计虽然以前也做过很多次了,但是使用SOA技术来完成设计确是第一次,所以有很大的挑战,也在设计中学到了许多东西。系统架构设计和组件设计之间的关系是整体与局部的关系,是全局与分支的关系。系统架构设计相当于战略思想,而组件设计相当于战术思想,前者定义了整个系统的框架,是整个系统成功与否的关键,后者组成了整个系统,一个好的组件,有创新的组件同样会给系统带来很大的功能,所以也是同样重要的。
     
    当然,两者之间的关系也不是绝对的,正如SCA组件是作为组件设计的,而Business State Machine的设计是用来对整个系统架构设计,形成流程的,但是我们也可以将整个Process包装为一个SCA组件,为更大的系统服务,这时候两者的角色就有转换。其实,做人做事也是一样的,从小做起,当你跳出一片更大的天空时,你会发现可以做的更多,正如参加这个比赛一样,做了之后,发现自己其实可以做的更好,所以要继续努力,SOA,恩,我喜欢这个词。

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