[Qt-interest] Handling translations in a multi-threaded server

[Tony Rietwyk]

> -----Original Message-----
> Sent: Thursday, 19 May 2011 20:42 PM
> 
> On Thu, May 19, 2011 10:35, Tony Rietwyk wrote:
> > I have multi-threaded servers that handle database queries from
> > potentially many clients in many different countries (especially the
> > European server).  The requests are processed via a thread 
> pool.  Each
> > request has the locale code for the translation file to be 
> used by the
> > IBase sql driver.
> >
> > The problem is that the IBase driver calls 
> QApplication::translate for
> > errors.  This implies all threads have to use the same 
> translation file.
> >
> > How have others worked around this limitation?
> 
> I haven't done this yet, but I would pre-load QTranslator 
> objects for all
> languages, NOT install them in the QApplication object, and then call
> QTranslator::translate with the untranslated string from the 
> IBase driver.
> 
> I hope this wasn't too confusing...
> 
> 
>     Konrad

Hi Konrad, 

Not at all.  I was coming to the same conclusion myself - load them all in a
QHash<QString, QTranslator *>.  Luckily, the QTranslator::translate method
is const, so multi-threaded access should not require locking.  Since
nothing gets installed on the application, the English messages will stay
the same when the IBase driver does its translate.  

Thanks! 

Tony