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Subject: [ebxml-cppa] RE: BPSS and BCP, was Exception Handling
Dear Marty,
Thanks for the affirmation and the correction - I fortuitously picked a bad
example! So the application will need to make some initial call to kick
things off, and that initial call will have to indicate the CPA (instance)
to use, which in turn will indicate the BPSS instance and network address,
messaging characteristics and security characteristics (and anything else?)
of the partner (several CPAs involved for a multi party situation but all
pointing to same BPSS instance?).
Presumably the business documents flow across the API?
What else might flow across the API?
I guess these questions are in the borderland between CPPA, BPSS and BCP.
Best Regards Tony
A M Fletcher
Cohesions 1.0 (TM)
Business transaction management software for application coordination
Choreology Ltd., 13 Austin Friars, London EC2N 2JX UK
Tel: +44 (0) 20 76701787 Mobile: +44 (0) 7801 948219
tony.fletcher@choreology.com <mailto:tony.fletcher@choreology.com> (Home:
amfletcher@iee.org <mailto:amfletcher@iee.org> )
-----Original Message-----
From: Martin W Sachs [mailto:mwsachs@us.ibm.com]
Sent: 14 August 2002 13:43
To: Tony Fletcher
Cc: Hayes, Brian (ebTWG); derrick.evans@bt.com; DMW; 'Duane Nickull';
ebtwg@lists.ebtwg.org; BCPS (list); BPSS List Ebtwg;
martin.me.roberts@bt.com; 'Matthew MacKenzie'; plevine@telcordia.com
Subject: Re: BPSS and BCP, was Exception Handling
I agree completely. People need to focus on BPSS as being where the rubber
meets the road with regard to execution of a particular instance of the
collaboration.
BPSS also needs sufficient explanatory text to satisfy the needs of the
middleware and application designers.
With regard to one detail in Tony's note: Information about a role that
resolves to the network address is in the CPA. The BPSS/CPA deployment
tool has to enter this information into the run-time database. The
application should not have to make an API call to provide the network
address. Perhaps the single most important reason for having a CPA and
BPSS instance is to get the application code out of the business of
configuring the middleware.
Regards,
Marty
****************************************************************************
*********
Martin W. Sachs
IBM T. J. Watson Research Center
P. O. B. 704
Yorktown Hts, NY 10598
914-784-7287; IBM tie line 863-7287
Notes address: Martin W Sachs/Watson/IBM
Internet address: mwsachs @ us.ibm.com
****************************************************************************
*********
Tony Fletcher
<tony. To: BPSS List Ebtwg
<ebtwg-bps@lists.ebtwg.org>, "Hayes, Brian (ebTWG)" <brian.
fletcher@choreology
hayes@collaborativedomain.com>, DMW <dmw@nwlink.com>, "'Matthew MacKenzie'"
.com> <matt@xmlglobal.com>,
"'Duane Nickull'" <duane@xmlglobal.com>, "BCPS (list)" <ebtwg-
bcs@lists.ebtwg.org>
08/14/2002 05:41 AM cc:
martin.me.roberts@bt.com, plevine@telcordia.com, derrick.evans@bt.com,
ebtwg@lists.ebtwg.org
Subject: BPSS and BCP, was
Exception Handling
Dear Folks,
I would like to get your reaction to the following postulation:
A completed CPPA (i.e. a CPPA instance) contains configuration information
for a business system. The CPPA includes (by reference) a BPSS instance
(or, in principle, some other description of the business process(es)) to
be
executed under that agreement. Thus I am coming to see the BPSS instance
as
containing configuration information for BCP.
If this last statement is true then we need to do two things (quite
obviously, but the ramifications may not be quite so obvious):
1) Design BCP so that it can instantiate its state machines with values of
variables, parameters, names, etc picked out of the BPSS instance.
2) Consider BPSS carefully to ensure that it has all the appropriate
values, and no inappropriate ones.
With respect to these two points we need to consider carefully the
information we expect to be feed across the API from the business
application into the BCP state machines. So for instance the BPSS may
provide the value for a role name of a remote partner as being 'supplier',
but information that resolves to a network address would be fed across the
API for a particular use of this BPSS instance.
If you all agree with this then we should get this written into the UeB
technical architecture as the relationship between BPSS and BCP and carry
the implications through as we evolve BPSS and BCP. If you do not agree
then please spell out where you think the error is and what your
understanding of the BPSS - BCP relationship is.
Thanks to all
Best Regards Tony
A M Fletcher
Cohesions 1.0 (TM)
Business transaction management software for application coordination
Choreology Ltd., 13 Austin Friars, London EC2N 2JX UK
Tel: +44 (0) 20 76701787 Mobile: +44 (0) 7801 948219
tony.fletcher@choreology.com <mailto:tony.fletcher@choreology.com>
(Home:
amfletcher@iee.org <mailto:amfletcher@iee.org> )
-----Original Message-----
From: DMW [mailto:dmw@nwlink.com]
Sent: 13 August 2002 22:18
To: 'Matthew MacKenzie'; 'Duane Nickull'
Cc: martin.me.roberts@bt.com; plevine@telcordia.com;
derrick.evans@bt.com; ebtwg@lists.ebtwg.org
Subject: RE: Exception Handling, was -> Re: Levine 7/29/2002: BCP Visit
for Arch Mtg 7/30
Guys,
The Business Collaboration Protocol (BCP) team is addressing all this
'stuff' right now; nested state machines, technical protocol to keep
object-in-state alignment between partners, .... and BCP supports the
UMM business layers so you can deal with all those BET/BCP+MC 'funky'
real world business cases !!!!
You should really consider camping out with the BCP folks for a while.
I just described BCP / BPSS to someone as : BPSS is like a hardcoded
runtime spec, while BCP describes a universal UMM business runtime
engine for any business process problem.
I advise NOT putting more 'sticky tape' on the BPSS till you check out
BCP.
-Dave
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