To add to the conversation, I wrote an agent-based website load tester
earlier this year for work. Happy to share my thoughts with Paul
offline if he thinks it's useful, although I wouldn't be able to share
the code itself.

On Dec 11, 2:25 am, Marko Topolnik <marko.topol...@gmail.com> wrote:
> To give the full story, I should add that atoms are very natural to use and
> many concurrent use cases are covered by them alone. The combination of
> atom and immutable vector/map goes a long way and they are also useful even
> with mutable data, such as lazy-initialized singletons, resources that need
> to be re-acquired after failure, and other similar cases.
>
> In general I can say that STM transactions of very fine granularity are
> easy to work with because they effortlessly intertwine with mutable data
> and side effects.
>
>
>
>
>
>
>
> On Monday, December 10, 2012 11:39:02 AM UTC+1, Marko Topolnik wrote:
>
> > The very fact that there has been no reply to this for five days may mean
> > something. I can personally attest to STM being very difficult to put to
> > real-life use because there is always that one thing you absolutely need
> > for your problem, that is mutable and not transactional. Most of the time
> > it will have to do with an existing Java library, JDK not excluded. The
> > property of STM that it is an all-or-nothing commitment has been a
> > show-stopper for me every time I tried to use it.
>
> > My guess is, if your task is something purely computational and amenable
> > to massive parallelization, you may have a go with STM; if it's just about
> > business logic accessible concurrently by many clients, you won't find it
> > workable.

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