OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help

bt-models message

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [Elist Home]

Subject: RE: minimum protocol framework

Mark Little sent:
(ii) separate out the coordinator logic from the actual "coordinator" (as per the HP submission), enabling the "initiator" (or should it be "terminator" in this case?) to control the business logic used to complete the business activity during its "flow". As was mentioned during the meeting there may be reasons why the actual coordination logic may need to change over time. Furthermore, if you think about what a coordinator actually does in terms of logic, message distribution, and response collation, the first and latter are configurable whereas actually sending the messages is probably not. What we suggested in our submission was separating the logic and response collation from the entity that sends messages: the coordinator is actually pretty dumb, allowing a single implementation of this to work with pretty much any model simply by slotting in different coordination/control logic.
Comments, suggestions?
I think I agree the possibility of the division of labour, but does this imply all the branches (participants ?) are equal ?
For a classic transaction, they are - each resource/subordinate has a veto and they all get the same final signal. The only exception is where something votes read-only, when (for most protocols) it is usually ignored thereafter.
For a cohesion, our use-cases have tended to include things which are distinct - some parts (atomic groups) within the cohesion may be vital to the overall purpose, others may be optional (any 2 from 5), others may have a preferred/backup relationship (cancel the second unless the first refuses). That means the coordinator must distinguish each of these to the control logic and send appropriate messages back to each.
ps. to model group: I'm going to be off email from tomorrow until Thursday - if I don't reply, I'm not ignoring people.

Peter Furniss
Choreology Ltd

email:  peter.furniss@choreology.com
phone:  +44 20 7670 1679
direct: +44 20 7670 1783
13 Austin Friars, London EC2N 2JX

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [Elist Home]

Powered by eList eXpress LLC