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From Emmanuel Lecharny <elecha...@apache.org>
Subject Re: Is the ExceptionMonitor usefull ?
Date Sun, 06 Jul 2008 13:08:15 GMT
Alex Karasulu wrote:
> On Sat, Jul 5, 2008 at 1:50 PM, peter royal <proyal@apache.org> wrote:
>
>   
>> On Jul 3, 2008, at 9:46 AM, Emmanuel Lecharny wrote:
>>
>>     
>>> Now, the question is why do we allow a user to define it's own
>>> ExceptionMonitor to handle unhandled exceptions. As we are defining a
>>> framework, it does not make a lot of sense to disregard an exception and let
>>> the user define what to do with it, as the user will have _no clue_ about
>>> where those kind of exception might be produced (our users are not all
>>> supposed to go through MINA code).
>>>
>>> So do we really need this class ? IMHO, this is a bad idea which has not
>>> been removed from the very first version (it comes far away : the class has
>>> been injected back in 2005, and was never derived since, if we except the
>>> default implementation.
>>>
>>>       
>> This is a feature I've used in the past.
>>
>> Yes, its a very general solution, but when you want to hook into what
>> happens when a random exception is thrown, its a lifesaver.
>>
>> I'd be -1 on removing it.
>>
>>     
>
> No worries, if it helps you we should keep it.  But I'm really curious
> though how it helped you in the past. I've used monitor callbacks instead of
> inline logging, then used a logging monitor implementation, to produce
> logging output in the past.  However this often created clutter for me and
> not many people seemed to use it to do anything other than logging.
>
> BTW I used this monitor concept in ApacheDS years ago (4 I think) for each
> of it's components instead of using logging.  The logging monitor
> implementations would produce log output instead of responding to events
> like exceptional conditions.  I wish I could find that link to the monitors
> verses logging article.  I encountered it after seeing a reference to it on
> an Avalon mailing list.  Incidentally, I think this is how the influence
> came about on both ApacheDS and MINA.
>   
Wondering how close is this to the concepts carried by AOP...


-- 
--
cordialement, regards,
Emmanuel L├ęcharny
www.iktek.com
directory.apache.org



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