RE: Basic question about creating/setting up webservices

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From: Dan Rogers (danro_at_microsoft.com)
Date: 12/01/04 

Date: Wed, 01 Dec 2004 19:45:12 GMT

Hi Sanjay,

Is the reason you want to refactor your application related to wanting to
share out all of the logic your web site uses to outside parties? If not,
then perhaps you want to think about what specific facades on your internal
logic you want to expose.

When you say you have existing classes, is it safe for me to assume that
your current web service code creates instances of these classes and then
uses them for types (data) and for the methods that operate on them? In
general, there is a quite a bit of work to do to make these refactored to a
web service due to issues with state-vs-statelessness, chatty versus chunky
designs, coupling etc, so without far more knowledge of the way your
current applications work, it is hard to say you could be successful at
just turning all of your methods and classes into web services.

Moving over to a service orientation requires some thoughts about making
the caller as independent as possible - and using the service side as a
gateway to application functionality, rather than a normal tightly coupled
object based system that lets setters and getters and methods all be mixed
together. In general, if your objects have business logic on your property
setters, or allow the caller to make assumptions about statefulness in the
managed code objects, there is a poor web service match and a lot of
refactoring for "very long distance (e.g. disconnected), stateless
behaviors" . Think of a web service based caller as being able to safely
assume that you connect and then dispose of your object references on each
use of a service (method).

I hope this helps

Dan Rogers
Microsoft Corporation
--------------------
>From: "news.microsoft.com" <spais@marketlinksolutions.com>
>Subject: Basic question about creating/setting up webservices
>Date: Wed, 1 Dec 2004 12:56:14 -0500
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microsoft.public.dotnet.framework.webservices:7726
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>
>I have been looking around at the documentation and have come across a lot
>about how to create webservices and consume them.
>
>I have a fairly large 3 tier application with a ton of classes in c# that
>are currently being used by the website. Is there a quick/ rad tool that
can
>take a c# class and generate a webservice proxy/asmx file? Any suggestions
>that does not involve writing the guts of the code from scratch :) would
be
>really helpful.
>
>Thanks in advance
>
>Sanjay
>
>
>

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