Ah, that makes more sense. Light just went on. Let me fiddle with this a
bit longer.

Thanks very much.


Tim Washington
Interruptsoftware.ca

No 6: "I'm not a number. I'M A FREE MAN!!!"
No 2: "HA HA HA HA HAAAAAAA"

-- The Prisoner


On Mon, Apr 22, 2013 at 6:09 PM, Neale Swinnerton <[email protected]>wrote:

>
> On 22 Apr 2013 20:19, "Timothy Washington" <[email protected]> wrote:
> >
> > Before getting into the nitty gritty, is there something obvious I can
> do to fix this code? Is alter a blocking call?
>
> You are seeing STM transaction restarts in action
>
> It looks like you are assuming that STM  will serialise your transactions
> like, say,  RDBMS transactions,  on a first come first served basis with
> subsequent transactions blocked until the current one is complete?
>
> If this is your assumption,  it's not correct I'm afraid.
>
> You must write the body of the dosync  such that it can run multiple
> times, each run starting with a different (but consistent)  view of the ref
> universe.
>
> Without more nitty gritty it's difficult to know more.  Possibly a queue
> is a better fit here? Have you considered using one from
> java.util.concurrent ?
>
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