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From "R J Scheuerle Jr" <sc...@us.ibm.com>
Subject RE: WSDL Aware Runtime
Date Tue, 19 Feb 2002 20:44:42 GMT
Thanks for the great note.


Rich Scheuerle
XML & Web Services Development
512-838-5115  (IBM TL 678-5115)


                                                                                         
                                  
                      "CHEN,SHIH-CHANG                                                   
                                  
                      (HP-NewJersey,ex2        To:       "'axis-dev@xml.apache.org'" <axis-dev@xml.apache.org>
             
                      )"                       cc:                                       
                                  
                      <shih-chang_chen@        Subject:  RE: WSDL Aware Runtime       
                                     
                      hp.com>                                                         
                                     
                                                                                         
                                  
                      02/19/2002 01:27                                                   
                                  
                      PM                                                                 
                                  
                      Please respond to                                                  
                                  
                      axis-dev                                                           
                                  
                                                                                         
                                  
                                                                                         
                                  



1. Current HP-SOAP does this. However, the 'WSDL-aware' feature, we
called it 'WSDL-validation', should be optional/configurable. If
'all' type information are NOT missing, wsdl MAY not be required
to correctly process a request.

2. Instead of using wsdl, you could use introspection of the
service impl class to figure out what type the param is. If this
is feasible/appropriate, then the purpose of setting WSDL-aware
is to validate request soap against the WSDL.

3. For your example:
             <echoParam>
                         <param>123</param>
             </echoParam>

If the service impl overload the echoParam as following:
String echoParam( int i ) {
             return "integer";
}
String echoParam( String s ) {
             return "string";
}

And the correspond operations on wsdl is also overloaded. Then the
type info still cannot be resolved from wsdl( and introspect. ).
I think a ambiguity exception/fault should be response in such case.


-chen



> -----Original Message-----
> From: R J Scheuerle Jr [mailto:scheu@us.ibm.com]
> Sent: Tuesday, February 19, 2002 1:53 PM
> To: axis-dev@xml.apache.org
> Subject: WSDL Aware Runtime
>
>
> I would appreciate some comments on the proposal to make the
> runtime 'wsdl
> aware'
>
> For example, if the following is recieved off the wire:
>
> <echoParam>
>    <param>123</param>
> </echoParam>
>
> There is no way to determine how to deserialize the data
> because the type
> attribute is not specified.
> But if the runtime is 'wsdl aware' it could examine the wsdl
> and determine
> the type of
> <param> and do the proper deserialization.
>
> Making the runtime 'wsdl aware' would also allow axis to check xml
> instances coming over
> the wire against the format described in the wsdl.  I suspect
> that other
> non-axis runtimes may
> already be doing this.
>
> Making the runtime 'wsdl aware' would also eliminate the
> extra information
> that is generated
> in the skeleton classes.
>
> The serializers/deserializers would need to be changed to traverse the
> wsdl/xml during
> serialization/deserialization.
>
> Has anyone given this any thought?
>
> Rich Scheuerle
> XML & Web Services Development
> 512-838-5115  (IBM TL 678-5115)
>




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