[Eric D. Tarkington]
Your question does raise a good point, though.  It is possible to launch
multiple threads of control that will come back asynchronously to a
single activity.  Offhand, I can't think of a situation where I would
want to work this way, but it doesn't defy any laws of physics.

[wmj]
People in a team are 'performing' "multiple threads of control". One or more
per person and/or role.

Regards
WMJ

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Eric D. Tarkington
Sent: Saturday, July 13, 2002 5:02 PM
To: Leslie Munday
Cc: Rose Forum; RUP Forum
Subject: Re: (RUP)(ROSE) Multiple Activity instances



Leslie Munday wrote:
> So, one more brief simple question, if a transition activates an activity,
and
> while that activity is exercising it receives a subsequent transition,
> 1) does the activity reset and start again,
> 2) does it complete before addressing the new stimulus,
> 3) does it ignore the subsequent stimulus or
> 4) is the behaviour customisable based upon the specification of the
activity?
>
> Les. (Please don't lose any sleep over the W/E, answer can wait until
Monday.)

I don't think the definition of an activity allows your hypothesis.  The
activity diagram is a specialized form of state diagram, and any given
activity or state operates only in discrete ticks.  An activity is a
degenerate state, with no memory of the past, and its response to an
event in a particular tick is atomic.

Your question does raise a good point, though.  It is possible to launch
multiple threads of control that will come back asynchronously to a
single activity.  Offhand, I can't think of a situation where I would
want to work this way, but it doesn't defy any laws of physics.

-Eric
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