Re: Simple Choreography composition suggestion

Andrew Berry wrote:
> I'd urge caution whenever you use the terms 
> "global" and "state" in the same phrase.  
> If you're talking about modelling then it's probably OK, 
> but run-time state shared between participants 
> connected via the Internet is a recipe for software 
> that will never perform or scale.  
[...]
> There are co-ordination approaches that can operate 
> on a local, partial view of the process state.  
> HP have done this in their labs with some 
> of their workflow tools.  My PhD thesis provides 
> another solution.

It is feasible to *align* (not *share*) state among 
participants in Internet business transactions.
Several standardized protocols exist including
OASIS-Business Transaction Protocol (BTP), 
ebXML BPSS, UNCEFACT-BCP, and RosettaNet.

At the end of a business transaction, one can say
with a high degree of reliability that the participants
will agree on a common state of (for example) an order.

One feature all of the above protocols have in common
is relaxation of ACID rules, for example, no locking
required.

-Bob Haugen