On Jan 27, 8:49 am, MikeM wrote:
> > Were watchers synchronous, they would have to run post-transaction
> > (else a watcher action failure could cause a transaction rollback,
> > leaving already notified watchers confused). Being post-transaction
> > would mean that the refs could have been cha
On Jan 27, 10:08 am, Tom Ayerst wrote:
> I thought the validator just set "Agent has errors" and you have to check it
> explicitly.
Vars, refs and agents can have validators. A validator on a ref can
prevent the ref from taking on a new value by throwing an exception,
which will cause a roll-b
I thought the validator just set "Agent has errors" and you have to check it
explicitly.
Tom
2009/1/27 MikeM
>
>
> > Were watchers synchronous, they would have to run post-transaction
> > (else a watcher action failure could cause a transaction rollback,
> > leaving already notified watchers co
> Were watchers synchronous, they would have to run post-transaction
> (else a watcher action failure could cause a transaction rollback,
> leaving already notified watchers confused). Being post-transaction
> would mean that the refs could have been changed by another
> transaction in the interi
I used a couple of watchers to push model updates onto the EDT in a Swing
app; it 'just worked'. I haven't pushed the envelope on it but the
abstraction is clear and clean IMHO.
Tom
2009/1/26 Rich Hickey
>
>
>
> On Jan 25, 4:06 pm, Stuart Sierra wrote:
> > Hi Rich, all,
> >
> > Ever since t
On Jan 25, 4:06 pm, Stuart Sierra wrote:
> Hi Rich, all,
>
> Ever since the new implementation of watchers I've been itching to try
> out Cells again. It worked great for agents. I ran into a snag,
> though, when I tried to make cells out of refs. Here's an example.
>
> I make two refs:
>
>
Hi Rich, all,
Ever since the new implementation of watchers I've been itching to try
out Cells again. It worked great for agents. I ran into a snag,
though, when I tried to make cells out of refs. Here's an example.
I make two refs:
(def r1 (ref 1))
(def r2 (ref (+ 10 @r1)))
Add a wat
