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Subject: Re: [soa-rm-ra] Interacting w/Services Model Updated (a start on EDA & event-driven SOA)
Catching up on email traffic and Jeff's additions to Interaction. I missed the live joint action discussion, so I can use some clarification. Is a request-response considered a joint action because I have two participants and by definition of the MEP I need both the request and the response to qualify as the resulting RWE? Is everything a joint action except for me sending a message to which I expect no response? Most of the material Jeff added about joint action applies equally to (simple?) action. However, my processing of the words in the wiki gets the sense that in a joint action a (some?) service has more of an initiating role. Am I reading in more than is intended? Also, saying a message "denotes" both an action and an event seems like an overload for very different message intents. The online Free Dictionary gives the following definitions for denote: 1. To mark; indicate: a frown that denoted increasing impatience. 2. To serve as a symbol or name for the meaning of; signify: A flashing yellow light denotes caution. 3. To signify directly; refer to specifically. Does UML have a more precise meaning in context for denote? Otherwise, the connection between message and action seems to be invoke (and in the reverse direction, Action is realized by Message); with respect to Events, it appears a Message notifies a participant of an Event, and an Event enters a participant's awareness through a notifying Message. (I was going to say "becomes visible" but I didn't want to confuse with more inclusive Visibility under RM.) We've tried to differentiate between Event and RWE but other discussions in this thread seem to say that Event reporting RWE is too limiting for Event. To me, Event connotes something happening and is a subset of RWE. So RWE could be the Event of sending a command to decrement an inventory and the final decremented inventory. Minor question: is RWE a set of effects or each individual effect or both? Is there a need to differentiate? Ken On Mar 19, 2007, at 1:40 PM, Francis McCabe wrote:
------------------------------------------------------------------------------------------ Ken Laskey MITRE Corporation, M/S H305 phone: 703-983-7934 7515 Colshire Drive fax: 703-983-1379 McLean VA 22102-7508 |
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