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Subject: RE: [ebxml-cppa-btp] Proposed requirements on CPP/A for BTP
- From: Tony Fletcher <tony_fletcher@btopenworld.com>
- To: Arvola Chan <arvola@tibco.com>,ebXML CPP/A BTP List <ebxml-cppa-btp@lists.oasis-open.org>
- Date: Thu, 23 May 2002 20:02:46 +0100
Dear
Arvola and other colleagues,
I
think the answer to most of your points is
------- Yes!
BTP
can be used between just two systems, but is arguably more useful when
co-ordination (atomic or cohesive) is required between a number of
systems.
Even
so, I am not sure that multiparty collaboration needs to be explicitly
supported. What I think is true is that a BTP enabled system may require
at least two CPAs and often many more (see the scenarios in the updated
requirements document). However, each CPA will be between just two
systems.
Yes, I
believe that BPSS should have explicit support (though this may turn out to be
quite simple and straightforward) for beginning and terminating transactions and
handling atomic or cohesive behaviour.
I
attended the first part of the ebTWG meeting in Barcelona - which why I was
unable to reply to this mail earlier - and presented on BTP to the business
process folk there. Brian Hayes (who leads the BPSS team has agreed to
draft a new charter to continue work on BPSS (headed to version 3.0), which will
include consideration of BTP as one of its prime topics. So the answer to
your point is yes indeed and we have started down the road - and you are all
most welcome to join in!
Thanks
for these thoughts. Prompted by them I have added four diagrams to the
proposed draft requirements for CPP/A for BTP enabled systems. These show
three scenarios or configurations of BTP enabled systems. If they are
agreed then what they show is that even in the simplest case a system may
require two CPPs (and two CPAs), one for its application plus BTP (CONTEXT and
CONTEXT_REPLY messages in particular) protocol and another for the business
transaction 'outcome' protocol. In the general case a system may require a
whole set of CPPs and CPAs.
Best Regards
Tony
A M Fletcher
Choreology Ltd., 13 Austin Friars, London
EC2N 2JX UK
Tel: +44 (0) 20
76701787 Mobile: +44 (0) 7801
948219
Tony:
I
don't remember if multiparty collaboration is already included in the agenda for
CPP/A 3.0, but it occurs to me that BTP cohesions and atoms may involve any
number of participants.
Does
the support of BTP in CPP/A 3.0 imply that multiparty collaboration must
also be supported?
Also,
will it be necessary to extend BPSS to describe the cohesion/atom behavor of
collaborations? For example, will a multiparty collaboration have to
identify the minimal subset of participants that must succeed before the
cohesion can be considered successful? Does the OASIS BTP team have any
plan to liaise with the ebtwg-bps team?
Thanks,
-Arvola
-----Original Message-----
From:
Tony Fletcher [mailto:tony_fletcher@btopenworld.com]
Sent: Tuesday,
May 14, 2002 12:52 PM
To: ebXML CPP/A BTP List
Subject:
[ebxml-cppa-btp] Proposed requirements on CPP/A for BTP
Dear Colleagues,
I think this is
the first mailing to this list for quite sometime - I hope it will not be the
last and that we will be able to have a little discussion ahead of the June
F2F and continue afterwards as we work towards a specification of some
sort.
Please find
attached an updated version of my proposed set of requirements for extensions
to CPP/A to include BTP capable systems. I put it like that, because it
is our current contention that there is actually very little to configure in
BTP itself. It should all be driven off the role being played in the
particular business process (and ideally even that would imply we are doing
BTP or we are not!)
I am travelling
over the next few days so I may be a little slow at replying, but I will try
to reply to any responses - and I will certainly be reading posts to this list
with interest even if there is no need for me to respond.
Best Regards
Tony
A M Fletcher
Choreology Ltd., 13 Austin Friars, London
EC2N 2JX UK
Tel: +44 (0) 20
76701787 Mobile: +44 (0) 7801
948219
Attachment:
ReqsOnCPPAforBTP.doc
Description: MS-Word document
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