Few queries on atomicity of requests

[Dean Harding]

Dean Harding wrote:
> One thing I like to do is you basically have two windows, a "fresh" 
> timeout and a "stale" timeout. During the "fresh" timeout, the item from 
> the cache is good enough. During the "stale" timeout, the item is coming 
> up to expiry time, and it might be a good idea to start thinking about 
> recalculating.

I should probably mention that I've thought about including this feature 
directly into a client library, but I never got around to it. It 
shouldn't be too hard, though.

Dean.