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.NET Forum / ASP.NET / Web Services / October 2005Converting an application to support Web Services ...
hello guys, There are many books on how to create web service application from scratch however I haven't found any resource to explain how to convert an existing application to support web services. As an example, let is say I have a 3-tier architecture application and in this example let is say I have a function Search which gets a customer ID and returns a Dataset. How can wrap up this component to a web service? Any examples, online resources or any book details will be appreciated .... TA Hello Annie, You should understand that WS is just RemoteInterface to your system, in general WS plays facade role. So, if u have Search function in some component and want extract it to the WS the first step you need to undertake is to create contract. In means that you need create XSD description of your interface that WS will expose, and using xsd.exe create a class from you XSD file. In this class you call your Search function from component. A> hello guys, A> There are many books on how to create web service application from A> scratch A> however I haven't found A> any resource to explain how to convert an existing application to A> support A> web services. A> As an example, let is say I have a 3-tier architecture application A> and in A> this example let is say I have A> a function Search which gets a customer ID and returns a Dataset. How A> can A> wrap up this component A> to a web service? Any examples, online resources or any book details A> will be A> appreciated .... A> TA A> --- WBR, Michael Nemtsev :: blog: http://spaces.msn.com/members/laflour "At times one remains faithful to a cause only because its opponents do not cease to be insipid." (c) Friedrich Nietzsch Hi Michael, Thanks for your information ... however, that is very vague "to create contract" ... I know what web services is and how it works ... the way you explain is more type of Message-Oriented WS which are not very scalable and not really matching with SOA if I understand your clue correctly. I have never used WS to create a Middleware for an existing system. I really, want some details resources ... eg online with a implemented scenario or a worthy book. TA > Hello Annie, > [quoted text clipped - 30 lines] > "At times one remains faithful to a cause only because its opponents do > not cease to be insipid." (c) Friedrich Nietzsche go to www.codeproject.com or msdn comunity you will find lots of info... there are many books too > Hi Michael, > [quoted text clipped - 44 lines] >> "At times one remains faithful to a cause only because its opponents do >> not cease to be insipid." (c) Friedrich Nietzsche Hello Annie, It's not vague, it's standard of the SOA Maybe u missed smth, but the last version of SOA is not RPC at all, it's message orient, bases on the document style. And it's why I recoment to use this kind of exposing. Moreover RPC is not scalable, they can't perform very good solution for robust and scalability and was obliged to move to the MOM (Message Orient Middleware). See w3c description of last version of SOA Now it's a *good* solution if u need to use SOA I've posted some links in my blog about this, repost them over here http://www.w3.org/TR/soap12-part2/ http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnpag/html/arch serviceorientedintegration.asp http://msdn.microsoft.com/architecture/thinkahead/default.aspx?pull=/library/en- us/dnbda/html/srorientwp.asp http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnpag/html/impl soiwithnet.asp A> Thanks for your information ... however, that is very vague "to A> create A> contract" ... I know what web services is A> and how it works ... the way you explain is more type of A> Message-Oriented WS A> which are not very scalable and not A> really matching with SOA if I understand your clue correctly. I have A> never A> used WS to create a Middleware for an existing system. A> I really, want some details resources ... eg online with a A> implemented scenario or a worthy book. A> A> TA A> A> "Michael Nemtsev" <nemtsev@msn.com> wrote in message A> news:43daf2322a7b5a8c79b0cb4fbc088@msnews.microsoft.com... A> >> Hello Annie, >> [quoted text clipped - 34 lines] >> "At times one remains faithful to a cause only because its opponents >> do not cease to be insipid." (c) Friedrich Nietzsche --- WBR, Michael Nemtsev :: blog: http://spaces.msn.com/members/laflour "At times one remains faithful to a cause only because its opponents do not cease to be insipid." (c) Friedrich Nietzsche Hello Michael, I appreciate all your help and time posting the details, cheers > Hello Annie, > [quoted text clipped - 74 lines] > "At times one remains faithful to a cause only because its opponents do > not cease to be insipid." (c) Friedrich Nietzsche Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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