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From Davanum Srinivas <d...@yahoo.com>
Subject RE: WSDL generation tools
Date Tue, 22 Jan 2002 15:22:07 GMT
Glen,

+1 on replacing DOM Document with javax.wsdl.Definition for generateWSDL.

Thanks,
dims

--- Glen Daniels <gdaniels@macromedia.com> wrote:
> 
> Hi Byrne!
> 
> > For example, I would love to be able to intercept requests for
> > '/axis/service?MY_WSDL' and return in the response a slight 
> > modification
> > to the default Axis Java2WSDL translation. Does the Axis framework at
> > this point support such functionality?
> 
> Yes.  The way the WSDL generation works is very much like a standard invocation of Handlers
in
> the standard order (transport->global->service->global->transport), except
that instead of
> calling invoke(MessageContext) on each Handler, generateWSDL(MessageContext) is called
instead. 
> This allows Handlers to put extra information, such as header descriptions, into the
WSDL.
> 
> The actual code to introspect a Java class for a service and turn it into WSDL can be
found in
> the JavaProvider class.  This means that by the time the provider returns from generateWSDL(),
> there should be a WSDL document in the "WSDL" property in the MessageContext (see AxisServlet's
> doGet() for an example of how this gets accessed).
> 
> So your best bet is probably to define a Handler which implements generateWSDL() and
deploy it
> on the response side of your service (or even in the global response chain if appropriate
for
> your application).  That Handler can grab the WSDL from the MC, edit it, and then put
it back.
> 
> <*** ATTN COMMITTERS! ***>
> Actually, this brings up an issue with the way the current code is structured.  As it
stands,
> the WSDL is returned as a DOM Document in the MessageContext.  I'm thinking we might
consider
> directly returning a javax.wsdl.Definition instead, and letting the AxisServlet (or whoever
else
> wants it as XML) serialize it into XML.  This would allow use cases like yours to more
easily
> manipulate the object structure of the WSDL, rather than having to translate it back
and forth
> between WSDL4J and DOM multiple times....  What do other Axis developers think?
> </*** ATTN COMMITTERS! ***>
> 
> > I would love to get involved and experiment in ways to make such
> > functionality possible, but I don't want to be reinvent'n the wheel as
> > it were.
> 
> Go for it!  We're very psyched when people use the engine in new and interesting ways
- please
> keep us posted as to your progress.
> 
> --Glen


=====
Davanum Srinivas - http://jguru.com/dims/

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