about processes and engines

rufus-scheduler 2.0, with em flavour

This blog is turning into a release gallery.

Anyway. Just released rufus-scheduler 2.0. It’s a complete rewrite. The only new “feature” is an EventMachine mode.

The plain scheduler uses a thread waking up every 0.330s (by default) to check for jobs to trigger, while the em-based scheduler uses an EventMachine timer.

Other flavour for the core loop are possible, why not something 1.9 fiber based in the short term ?

This release 2.0 is mostly backward compatible. Only some corner cases and advanced usages (block arity) have changed (they have been simplified). Having a look at the readme should help.

require 'rubygems'
require 'rufus/scheduler' # sudo gem install rufus-scheduler

s = Rufus::Scheduler.start_new

will still work, it will return an instance of Rufus::Scheduler::PlainScheduler, but if an EM reactor is running, it will stick to it and return a Rufus::Scheduler::EmScheduler instance.

source :
rdoc :
ml :

Many thanks to Klaas Jan Wierenga for contributing nice stress tests (for the 1.0 and the 2.0 branches), thanks as well to Kenneth Kalmer for its daemon-kit + rufus-scheduler effort.


Written by John Mettraux

May 7, 2009 at 2:27 am

Posted in ruby, rufus, scheduling


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