Your understanding of $_KERNEL->alarm() is slightly off. It will clear any undispatched alarms with the same event name (for the same session) before setting the new one. Compare it to alarm_add(), which adds another alarm without clearing the previous one.

In your broken case, "wakeup" is always dispatched before "wokeup" because it's a fraction of a second earlier (due to Time::HiRes::time()). Every time "wakeup" is dispatched, it pushes "wokeup" 2sec into the future... so "wokeup" never has a chance to be dispatched.

Actually, it behaves the same way even if "wakeup" and "wokeup" are set for the same time. POE breaks ties by dispatching timers in the order they were set.

--
Rocco Caputo - http://poe.perl.org/

In reply to Re: POE::Session - why does alarm order matter? by rcaputo
in thread POE::Session - why does alarm order matter? by jfroebe

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