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From: Eric Wong <normalperson@yhbt.net>
To: unicorn list <mongrel-unicorn@rubyforge.org>
Subject: Re: Thread.current
Date: Tue, 11 Jan 2011 15:12:27 -0800	[thread overview]
Message-ID: <20110111231227.GA27058@dcvr.yhbt.net> (raw)
In-Reply-To: <AANLkTim=ymsUHz8KN5niEV6kwJaMtOQyuMny-CqDSqgb@mail.gmail.com>

Jimmy Soho <jimmy.soho@gmail.com> wrote:
> Hi,
> Some more questions still:
> It seems a worker uses the exact same thread to handle each request.


> Is that guaranteed to happen for the lifetime of a worker? Or are
> there cases where a unicorn worker might spin a new thread to handle
> the next requests?

Unicorn itself is always single-threaded and never spawns new threads.

> If the same thread is always used, isn't that a potential issue when
> programmers use thread local variables, which are not reset at the
> next request?  (I know, the usage of thread local variables is not
> recommended, but take a random rails project, go into their $GEM_HOME
> and do grep -r Thread.current . , see what I mean..)

Thats the problem of those libraries/apps, not Unicorn.

They can try Rainbows! using the :ThreadSpawn option which behaves much
like Mongrel 1, but uses Rainbows! in production that I know of.

The Rack +env+ hash is the safe/universal way to store request-local
variables across different web servers.

Eric Wong
Unicorn mailing list - mongrel-unicorn@rubyforge.org
Do not quote signatures (like this one) or top post when replying

  reply	other threads:[~2011-01-11 23:18 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-08  2:00 Thread.current Jimmy Soho
2011-01-08  2:57 ` Thread.current Eric Wong
2011-01-08  3:09 ` Thread.current Curtis j Schofield
2011-01-08  5:54   ` Thread.current Jimmy Soho
2011-01-11 22:52     ` Thread.current Jimmy Soho
2011-01-11 23:12       ` Eric Wong [this message]
2011-01-11 23:12       ` Thread.current Jordan Ritter
2011-01-12  3:07         ` Thread.current Jimmy Soho
2011-01-13  4:26           ` Thread.current Eric Wong
2011-01-13 16:46             ` Thread.current Jordan Ritter

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