[Springframework-developer] Binding Locale to threadlocal

[Colin S. <col...@ex...>]

I'm thinking of the best strategy for making the locale available to the 
MessageSourceAccessor, as per SPR-485:
  http://opensource.atlassian.com/projects/spring/browse/SPR-485
This would probably be a TheadLocal that the locale is bound to. The 
question is what the best strategy to do this is. I suppose 
DispatcherServlet could just bind the locale to a threadlocal, using the 
configured LocaleResolver, before dispatching. The problem here is that 
it won't pick up a changed locale as a result of a setLocale call on the 
localeresolver by the web code. Alternately, a ControllerInterceptor 
would have the same limitation, and would also have to be configured in 
front of every controller. What I am thinking would perhaps work though 
is something like a new Interface called LocaleAccessor. The 
implementation would be a JavaBean, and would be bound to the thread by 
the dispatcher. What it would hold would be both the Servlet Request, 
and also the LocaleResolver. When asked to get the Locale, it would be 
able to use the normal localeresolver, since it would also have the request.

The whole point of this is so that non-view layer code can have access 
to locale resolution, in a similar fashion to view layer code.

Can anybody think of a better mechanism?

Colin