Re: patch: tiny patch to correct stringbuffer size estimate

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От Felipe Schnack
Тема Re: patch: tiny patch to correct stringbuffer size estimate
Дата
Msg-id 20030722120545.134ebe3a.felipes@ritterdosreis.br
обсуждение исходный текст
Ответ на Re: patch: tiny patch to correct stringbuffer size estimate  (Oliver Jowett <oliver@opencloud.com>)
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  Am I wrong or the jdbc spec say they should be thread-safe?

On Wed, 23 Jul 2003 02:28:07 +1200
Oliver Jowett <oliver@opencloud.com> wrote:

> On Tue, Jul 22, 2003 at 11:20:11AM -0300, Felipe Schnack wrote:
>
> >   These StringBuffer woes remember of an old request we made to this
> >   list... The last time I checked driver's sources, all acess to
> >   preparedstatement's stringbuffer are synchronized... this isn't
> >   necessary as jre's Stringbuffer already has all of its methods
> >   synchronized. The driver is still doing that? Just curious.
>
> Yes, but to be threadsafe with a shared buffer you do need to synchronize as
> the driver does a series of operations to accumulate a string that need to
> be atomic. Synchronizing on each individual operation isn't enough.
>
> That said, it's pretty silly to write code that depends on a Statement being
> threadsafe :)
>
> -O


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