On Mar 3, 3:38 pm, Jeffrey Straszheim <[email protected]>
wrote:
> I'm pretty sure I don't want an agent based model. I want clear
> transactional semantics. However, there is no reason both should not
> exist.
I think you can get solid transactions with lazy agents, since an
update corresponds to a single step/data pulse/whatever. Pseudocode:
(dosync
Attach a watcher to all the cells, that when requested blocks
until they've computed a new value
Change the values of the base cells
Send an update message to all the cells, which will cause them all
to update exactly once
Wait on the watcher)
Since agents are integrated with the STM, my understanding is that the
new data update will get written in all at once. Is that good enough
for your purpose?
As Raffael pointed out, the laziness doesn't get you recording of
previous values... but that wouldn't be inordinately challenging to
add in.
Anand
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