http://www.johndcook.com/blog/2009/11/19/software-development-quotes/ The blog of John D. Cook Thu, 18 Mar 2010 14:57:38 -0400 http://wordpress.org/?v=2.8.4 hourly 1 http://www.johndcook.com/blog/2009/11/19/software-development-quotes/comment-page-1/#comment-27518 Roger Sessions Thu, 19 Nov 2009 16:12:42 +0000 http://www.johndcook.com/blog/?p=3747#comment-27518 Thanks for the mention. My point is that architectural agility comes from allowing people to make decisions locally. But architectural chaos comes when those decisions are not tied together in a coherent way. So to give but one example, a good SOA describes how services are tied together through messages, but nothing about how those services are implemented. If the various service implementation groups can't agree on a database, it doesn't matter. Through agreeing that the services work together through messages (and only through messages), we have agreed to disagree on the implementation details, such as how data is stored, what language is used, etc. Thanks for the mention. My point is that architectural agility comes from allowing people to make decisions locally. But architectural chaos comes when those decisions are not tied together in a coherent way. So to give but one example, a good SOA describes how services are tied together through messages, but nothing about how those services are implemented. If the various service implementation groups can’t agree on a database, it doesn’t matter. Through agreeing that the services work together through messages (and only through messages), we have agreed to disagree on the implementation details, such as how data is stored, what language is used, etc.

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