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From Danny Angus <Danny_An...@slc.co.uk>
Subject Re: MailetException vs MessagingException
Date Mon, 20 Oct 2003 13:02:28 GMT





Vincenzo,

> This may be just a matter of clean code, but browsing around the matchers
and mailets in CVS, I found that many of them are
> throwing MessagingException-s instead of MailetException-s (including my
own code ;-).


This is just a guess, but I seem to remember thinking that MailetException
was thrown by the container on catching an exception raised in, or
propogated by, a mailet or matcher, whereas messaging exception is raised
by failure to handle a message.

On the other hand it makes sense that mailets throw only new
MailetExceptions but can propogate MessagingExceptions raised in JavaMail.
Because you can then distinguish between mailet problems and java mail
related ones.

I'd support a refactoring to only use one of them, or one that used both
but made MailetException extend Exception not MessagingException, on the
basis that MailetException isn't usefully a specialisation of
MessagingException, and MessagingException is regarded (by me at least) as
"JavaMail exception".

d.



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