Re: [wsrp-interfaces] Should portlets/producers indicate that theypush out persistent state?

[Subbu Allamaraju <subbu@bea.com>]

I see the use cases, but I wonder if a consumer supporting both WSRP 1.0 
and 2.0 can count on using such a flag.

Secondly, from a specification point of view, such a flag would impose 
new rules on producers counting on pushing state to consumers as and 
when required.

You mentioned sharing handles below. If a consumer is able to share 
handles (including cloned portletHandles) across different instances, it 
can share the state as well.

Subbu

Richard Jacob wrote:
> I have a question regarding persistent state pushing to the Consumer.
> This can either be the state in the RegistrationContext or in the
> PortletContext.
> Currently the Producer can push its state whenever it likes to, and the
> Consumer requires to handle it accordingly (return it back, persist it).
> 
> Shouldn't we have metadate that indicates the Producer/Portlets preference
> to push out state?
> In that case the Consumer can choose to not use such a portlet.
> I see two use cases for it:
> 1.) the Consumer can't/doesn't want to persist the data be it for
> technical/resource reasons or legal/privacy reasons
> 2.) the Consumer "shares" the handles with another Consumer/Machine. We
> discussed such scenarios when we discussed import/export.
> From the Producer's perspective this is still the same Consumer (unless
> some security mechanism says otherwise), so protocol-wise this is perfectly
> legal.
> However if the Producer chooses to push out persistent state, such
> scenarios won't work unless the different "Consumers" sync themselves in
> some manner.
> 
> So what I'm asking for is basically two things:
> 1.) add metadata to the ServiceDesc saying that the registrationContext
> might contain state
> 2.) add metadata to the PortletDesc saying that the portlet intends to push
> out state in the PortletContext
> 
> Mit freundlichen Gruessen / best regards,
> 
>         Richard Jacob
> ______________________________________________________
> IBM Lab Boeblingen, Germany
> Dept.8288, WebSphere Portal Server Development
> WSRP Team Lead & Technical Lead
> WSRP Standardization
> Phone: ++49 7031 16-3469  -  Fax: ++49 7031 16-4888
> Email: mailto:richard.jacob@de.ibm.com
>