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Subject: Re: [wsrp] Shared Sessions


Carsten,
    Let me clarify my position.  I believe that a consumer can choose to provide a capability for segmenting portlets from the same producer into
different sessions.  A consumer defines the scope of the session.  It is reasonable for a consumer to provide a capability that allows a subset of
portlets to be grouped into distinct sessions.  But I don't believe that we should mandate that all consumers do so.  Nor should we define required
meta-data that allows a producer to describe its rules for grouping and have any expectation that a consumer will honor it.   A producer that
requires a certain segmentation will have to define that segmentation within itself and establish/maintain that segmentation without the help of the
consumer.
     So to be clear:  I don't believe that a consumer is restricted to running all portlets/entities in the same session.  I do believe that we
shouldn't define a way for a portlet/entity to describe how it should be grouped and require consumers adhere to it.  Rather, producers must code
within themselves to achieve this.
         -Mike-

Carsten Leue wrote:

> |---------+---------------------------->
> |         |           Carsten Leue     |
> |         |                            |
> |         |           06/06/2002 05:50 |
> |         |           PM               |
> |         |                            |
> |---------+---------------------------->
>   >---------------------------------------------------------------------------------------------------------------------------------------------|
>   |                                                                                                                                             |
>   |       To:       Michael.Freedman@oracle.com                                                                                                 |
>   |       cc:       wsrp-interfaces@lists.oasis-open.org                                                                                        |
>   |       From:     Carsten Leue/Germany/IBM@IBMDE                                                                                              |
>   |       Subject:  Shared Sessions                                                                                                             |
>   |                                                                                                                                             |
>   |                                                                                                                                             |
>   >---------------------------------------------------------------------------------------------------------------------------------------------|
>
> Mike - unfortunately I missed your note that the telephone conference began
> earlier. But when we then talked about shared sessions I was a little
> concerned.
> As far as I understood the proposition, you would vote for creating one
> session for ALL remote portlets (coming from one provider). These can then
> share data in this session but would be responsible for using namespaces
> when trying to store private data.
>
> This is clearly a simple approach but it recalls me of the "old"
> programming models on desktop machines where all processes could access
> (and destroy) data from all other processes on a machine. This easily leads
> to instability and security issues.
>
> I would propose that the consumer would be responsible for a sort of
> "application protection" where it lets only selected portlets (maybe based
> on metadata) share a session. This could efficiently isolate different
> logical sets of remote portlets. The argument that in such a case you could
> simply create a new portlet service does not hold for me as in may cases
> all portlets would be published by the same portal (so the same portlet
> service).
>
> Best regards
> Carsten Leue
>
> -------
> Dr. Carsten Leue
> Dept.8288, IBM Laboratory B÷blingen , Germany
> Tel.: +49-7031-16-4603, Fax: +49-7031-16-4401
>
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