There are so many topics about differences between these two adapters and I myself have gone through many topics about the same. But there is not even a single thread that tells the exact reasons why we use each adapter.
One of the reasons you dont find that information is becuase it really depends on what you are doing. In every integration the need of adapters may change. It depends on you requirements.
So, it is very difficult to generalize adapters. For example there are a lot of ways to communicate with a SAP system. XI adapter, IDoc adapter, SOAP adapter, RFC adapter etc. But which one will satisy you is up to your scenario you are donig
Some good reasons to use WSDL and convince your vendor:
1. WSDL aids interoperability. You can post your WSDL to a directory (Service Registry, UDDI) and any Web Services developer in any technology (Java, .NET, etc.) will have everything they need to build a client to invoke your service
2. WSDL is more expressive than HTTP alone. With WSDL I can specify message payloads, invocation styles (RPC or document) and encoding, as well as endpoint addresses.
3. WSDL is a required artifact for many testing tools, Web Services frameworks, and service management products. Without WSDL, you can't take advantage of these technologies
4. WSDL is a standard. You are better off conforming to standards and conventions when building software that potentially needs to communicate with the outside world.
5. WSDL assists in portability. When you move it, you will have a definition of your service from which to start.
There are probably other reasons but these are what comes immediately to mind.
Does all this benefits you? YES, it does.
And it's called SOA, Service Oriented Architecture
Thanks for the response and thanks again for not provinding forum links but a logical answer
The basic advntg pf SOAP over HTTP that I am able out is that its definition is self conatained in the WSDL as compared to the HTTP where the parameters need to be conveyed to the client seperately .
Anything else that you feel tops the advntg liist?
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