Re: [Springframework-developer] Article on not using ThreadLocal

[Juergen H. <ju...@in...>]

Quoting myself from my reply to Billy's post:

Actually, Spring does not use ThreadLocals in the way you describe. Spring
always just uses ThreadLocals temporarily, while guaranteed to be on the
same thread, with proper cleanup at the end (in any case). This applies to
transaction ThreadLocals as well as to others.

IMO, this is completely valid: As long as the ThreadLocal is always
guaranteed to be cleaned up when returning the thread to the server's pool,
I cannot see anything going wrong... So it's not about using ThreadLocals in
general, it's about _properly_ using ThreadLocals.

Juergen


-----Original Message-----
From: spr...@li...
[mailto:spr...@li...]On Behalf
Of John Watson
Sent: Wednesday, June 15, 2005 10:24 PM
To: spr...@li...
Subject: Re: [Springframework-developer] Article on not using
ThreadLocal


The real question (IMHO) is why thread-pool vendors don't clear thread
locals!  I do agree that it can be very dangerous to use the
ThreadLocal.  You do need to know what you're doing when you use them.
 I wish that vendors would help protect us from our own sloppiness,
though.

John


On 6/15/05, Tim Kettering <tim...@vi...> wrote:
>
>
>
> This guy (presumably a senior dev @ IBM) says not to use ThreadLocal.  He
> says that usage should be removed from open-source projects (mentioning
> Spring specifically).
>
>
>
> Wanted to pass this url on – see what you Spring developers thought about
> this…
>
>
>
> http://www.devwebsphere.com/devwebsphere/2005/06/dont_use_thread.html
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