Re: [Pywebsvcs-talk] Re: ZSI and generators

[Keith J. <krj...@lb...>]

On Mar 30, 2004, at 12:54 PM, Christopher Blunck wrote:

>>
>> No, because I want to use the generator lazily, only when a SOAP
>> client requests something. The SOAP server should not process data in
>> advance.
>
> That would then imply that the SOAP connection is stateful, something  
> that is
> generally frowned upon.

The connection to the service shouldn't be stateful, but we have to  
deal with state.

See: http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=wsrf
We are attempting to define standard ways of interacting with stateful  
resources hidden behind a stateless WS interface.

> What you could do is pass state as a parameter to your
> generator operation.  Example:
>
> client:  key = server.getKey()
> client:  token = server.generate(key)
> client:  doSomethingWithToken(token)
> client:  token = server.generate(key)
>
> in the server, use a global dictionary field with keys and generators.
>
> this of course is kind of silly, and prone to consume memory.  but then
> again, nobody said stateful soap was easy...

There are a number of proposed standard ways to deal with this instead  
of explicitely passing state as an explicit param. WSRF as I mentioned  
above is one, WS-Context is another.
--kj

>
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Keith R. Jackson, Lawrence Berkeley National Laboratory
1 Cyclotron Rd. MS: 50B-2239, Berkeley, CA 94720
tel: 510-486-4401  fax: 510-486-6363
krj...@lb... http://www-itg.lbl.gov/~kjackson/
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