Exceptions handling

Hi Apogee devs,

It's time to think about errors and exception handling in Apogee. The 
purpose of this discussion is to get rid of "printstacktrack" way to 
easily avoid the problem and find a new and simple way to warm the user 
and give good information for the developpers if debugging is needed.

To start the discussion, in a first glance, Alain said :
"I guess all the exceptions should be thrown to the top so that there is 
systematically a UI signal when something is wrong ... "

I think we have few ways to handle exception :
• logging -> reuse existing nuxeo way to handle them (log4j) ?
• display to user -> IStatus (the message it self and status) and 
ErrorDialog, maybe in the Status bar as well.

I think Apogee should have its own way to deal with exception. Because 
it is supposed to handle not only nuxeo, we should embed nuxeo handled 
exception from coming the core.

Any idea is welcome :)

Sun.