Hello,
getting and setting values in the Thread.current hash appears in the RoR 
code a bunch of times, including in active_record and active_support.
I keep getting conflicting information, however, on whether information 
stored in Thread.current is dependable.
In essence, this is my question:

*Is the Thread.current hash guaranteed to be available and private 
throughout one and only one request-response cycle?*

In other words, if I do something like:
Thread.current[:my_own_very_special_key] = 1
at the beginning of a response, can I count on all parts of my application, 
including models(*), to reliably access that value?

Provided I also do:
Thread.current[:my_own_very_special_key] = nil
just before the end of the response (say, in a controller's after_filter), 
am I guaranteed that the information is not leaked to other 
processes/threads/requests/browsers/users?

(OK, I have just given out my ignorance of webserver and webapp framework 
innards. Oh well...)

Thanks!
Giuseppe

(*) I know that accessing Thread.current from my models is frowned upon, 
but I would very much like to know if the practice is safe, albeit ugly.

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