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Subject: RE: [wsrp-wsia] [wsrp] initEnvironment and groupID - my final thoughts before we vote


Hi Carsten,

Would you agree that your last statement can be better stated as:

- the only way to rely on initEnvironment without having metadata that
describes applications would be to have a producer for each
application.


	Yossi.

-----Original Message-----
From: Carsten Leue [mailto:CLEUE@de.ibm.com]
Sent: Thursday, October 10, 2002 2:58 PM
To: wsrp-wsia@lists.oasis-open.org
Subject: [wsrp-wsia] [wsrp] initEnvironment and groupID - my final
thoughts before we vote


Hi everybody.

I want to send around some of my thoughts on initEnvironment and groupID
before we vote on that issue today:

- I understand that we can live without a groupID if we restrict ourselves
to what is currently possible in JSR 168, i.e. sharing information between
portlets on a user/application level. But we will not be able to share
state on application instance levels.
- there is the possibility to implement this scenario in a cluster with
parallel access WITHOUTgroupID, initEnvironment and cookies (see Andre's
description some weeks ago)
- JSR 168 mandates that application sharing MUST take place via the HTTP
session. Only for this reason we need to define cookie handling in the WSRP
protocol and introduce initEnvironment. This leads to a protocol specific
aspect of WSRP.
- the use of initEnvironment also mandates that the consumer must have the
information what entities form an application (to call initEnvironment for
each app). To call initEnvironment just per user and producer would not be
an option as JSR 168 mandates that each application has its own distinct
HTTP session.
- the only way to rely on initEnvironment without having metadata that
describes applications would be to limit a producer to having one single
application.

I tried to state facts neutrally. Can everybody agree that the statements
are correct or did I oversee important facts? If so I can vote happlily
today.

We should vote on two issues:
- groupID yes/no
- app description metadata yes/no

Best regards
Carsten Leue

-------
Dr. Carsten Leue
Dept.8288, IBM Laboratory Böblingen , Germany
Tel.: +49-7031-16-4603, Fax: +49-7031-16-4401



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