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Re: Article on WS architecture and best practice ... may be of in terest

From: Paul Prescod <paul@prescod.net>
Date: Thu, 03 Oct 2002 12:54:45 -0700
Message-ID: <3D9CA085.6080800@prescod.net>
To: Ugo Corda <UCorda@SeeBeyond.com>
CC: "'Champion, Mike'" <Mike.Champion@SoftwareAG-USA.com>, www-ws-arch@w3.org

Ugo Corda wrote:
>>this methodology
>>defeats the whole purpose of Web services, which is to hide the
>>implementation of a service completely behind an XML-based interface. 
>>VS.NET generates the interface from the implementation.
> 
> 
> I don't see the conflict here. For any user of the Web service the generated
> interface does exactly that: hides the original implementation.
> 
> If the point made by the article is that Web services interfaces should be
> defined first and implementations should follow, this is evidently not
> possible in all those cases where Web services are used as wrappers for
> legacy implementations.

I think that the point is that the web service's interfaces should be 
designed to make it into a good network application which could be 
radically different than the appropriate interfaces for a LAN-based or 
desktop software component for all of the reasons described in the 
"Waldo paper" and elsewhere. If you are just letting software "generate" 
your network interface from a pre-existing interface then the chances it 
is optimal as a network application is tiny.

  Paul
Received on Thursday, 3 October 2002 15:55:18 GMT

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