On Dec 17, 1:57 pm, Randall R Schulz <rsch...@sonic.net> wrote:
> On Monday 15 December 2008 17:58, Randall R Schulz wrote:
>
> > Hi,
>
> > I've just started using agents and as I've done that, I've noticed
> > that once you use an agent, exiting the REPL leads to a hang (with
> > zero CPU usage). As Rich pointed out to me, this is avoided by
> > calling (shutdown-agents).
>
> > So my question is this: What's a simple way to ensure that
> > (shutdown-agents) is called when necessary without having to remember
> > to manually enter that call at the REPL before exiting?
>
> This sequence of evaluations ends in the REPL hanging:
>
> 1:1 user=> (.. Runtime (getRuntime) (addShutdownHook (new Thread
> shutdown-agents)))
> nil
> 1:2 user=> (def agent-99 (agent "Secret agent (99)"))
> #'user/agent-99
> 1:3 user=> (send-off agent-99 (fn [a] (println (str "In agent: " a))))
> In agent: Secret agent (99)
> #<Agent clojure.lang.ag...@5b0668>
> 1:4 user=> (await agent-99)
> nil
> 1:5 user=>
>
> CTRL-D
>
> [ Hangs here. CTRL-C gets back to shell prompt. ]
>
This is not a problem when using clojure.lang.Repl, but is when using
clojure.main.
Rich
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