Re: [ws-rx] PR issue 1 - WS-Addressing comment on ws-rm related touse of extended anonymous uri

[Paul Fremantle <paul@wso2.com>]

Aha I remember now! I knew there was some discussion. Maybe I'm getting 
senile.

So the real issue in using anon+refparam is that a polling reference 
parameter would be minted by the client but the server would need to 
look at it (especially this one) in order to compare the EPR of the 
incoming request with the EPR of a stored message. So the real question 
is what "opaque" means.

I agree that the WS-A WG might be a little more helpful. What it boils 
down to is that for this half of polling model we need a way of ensuring 
that a client can mint a clearly unique and comparable anonymous EPR.
We want the protocol to define a scheme for those EPRs with a place for 
a unique ID, and we have to be able to compare these EPRs and 
disambiguate them at the server side. I think the issue around opacity 
is that we wish to imbue a specific reference parameter with special 
weight when it comes to EPR comparison.

I personally think that is a fair enough requirement onto WSA and maybe 
we should take their advice on what the best approach is. If they are 
saying that a reference parameter is the right way to do that, and that 
we aren't breaking the opacity of the refparam by using it for 
comparison purposes, then maybe we should accept their judgement and use 
that approach.

Paul

Gilbert Pilz wrote:
> The origins of this go back to a struggle in WS-Addressing between
> "reference parameters" and "reference properties". Reference parameters
> are supposed to be opaque to everyone except the minter of the EPR. The
> proto-usecase is a service consumer disambiguating callback operations
> by placing unique parameters in its ReplyTo EPRs. Using reference
> parameters to communicate identity information from the service consumer
> to the service provider (which is what this idea entails) basically
> turns them into "reference properties". The problem with reference
> properties is that there is *no* such thing (the WS-Addressing WG said
> so).
>
> It's ironic that the WS-Addressing WG first said "there is no such thing
> as reference properties" then turns around and says "maybe you should
> solve this problem using reference properties".
>
> - gp
>
>   
>> -----Original Message-----
>> From: Paul Fremantle [mailto:paul@wso2.com] 
>> Sent: Tuesday, September 26, 2006 9:32 AM
>> To: Doug Davis
>> Cc: ws-rx@lists.oasis-open.org
>> Subject: Re: [ws-rx] PR issue 1 - WS-Addressing comment on 
>> ws-rm related to use of extended anonymous uri
>>
>> Doug
>>
>>     
>>> - rather than looking at the bigger issue of how a new URI 
>>>       
>> defined by 
>>     
>>> some specification can compose with WSA's wsaw:Anonymous 
>>>       
>> URI, the WSA 
>>     
>>> WG kept wanting to reexamine whether or not RM's solution was the 
>>> right choice.  For example, could WSA's anon+ref-p's be 
>>>       
>> used instead.
>> Didn't we discuss this option (anon+refps)? Can you remind me 
>> why we didn't go for it?
>>
>> Paul
>>
>>
>>
>>     
>
>