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Re: On Faults

From: Jean-Jacques Moreau <jean-jacques.moreau@crf.canon.fr>
Date: Tue, 01 Apr 2003 10:02:37 +0200
Message-ID: <3E89479D.80605@crf.canon.fr>
To: "Amelia A. Lewis" <alewis@tibco.com>
CC: public-ws-desc-meps@w3.org


On reflection, I don't think we can (or should) predict when a fault
might occur. This is somewhat analoguous to exceptions in programming 
languages versus checking return codes.


Amelia A. Lewis wrote:
> I'd like to propose, probably for later consideration, that we drop
> the explicit characterization of faults in exchange patterns.
> I believe that the inclusion of faults in the patterns simply
> confuses the issue.  It also potentially multiplies the number of
> patterns, as each different fault-handling paradigm creates a
> separate 'dialect' of each pattern.
> There are two fairly straightforward rules that could be adopted in
> place of the current explicit definition.  Moreover, it might be
> possible, using the properties mechanism, to specify per-protocol
> binding or per-service, which fault-handling rule should be used.
> These two rules are:
> 1. Any message may trigger a fault in response. 2. A fault may
> substitute for any message after the first in a pattern.
> #2 is appropriate, for instance, for HTTP.  #1 is more likely to be
> encountered in asynchronous sorts of protocols.
> I'd like to make this a proposal, but not as a high priority, as we
> are currently focusing on issues of "what is a MEP" and "MEPs versus
> IOPs" and "which belongs in portType/interface?".
> Amy!
Received on Tuesday, 1 April 2003 03:03:00 UTC

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