Collections of one-shot and periodic timers, intended for use with event loops such as async.
Add this line to your application's Gemfile:
gem 'timers'
And then execute:
$ bundle
Or install it yourself as:
$ gem install timers
Create a new timer group with Timers::Group.new
:
require 'timers'
timers = Timers::Group.new
Schedule a proc to run after 5 seconds with Timers::Group#after
:
five_second_timer = timers.after(5) { puts "Take five" }
The five_second_timer
variable is now bound to a Timers::Timer object. To
cancel a timer, use Timers::Timer#cancel
Once you've scheduled a timer, you can wait until the next timer fires with Timers::Group#wait
:
# Waits 5 seconds
timers.wait
# The script will now print "Take five"
You can schedule a block to run periodically with Timers::Group#every
:
every_five_seconds = timers.every(5) { puts "Another 5 seconds" }
loop { timers.wait }
You can also schedule a block to run immediately and periodically with Timers::Group#now_and_every
:
now_and_every_five_seconds = timers.now_and_every(5) { puts "Now and in another 5 seconds" }
loop { timers.wait }
If you'd like another method to do the waiting for you, e.g. Kernel.select
,
you can use Timers::Group#wait_interval
to obtain the amount of time to wait. When
a timeout is encountered, you can fire all pending timers with Timers::Group#fire
:
loop do
interval = timers.wait_interval
ready_readers, ready_writers = select readers, writers, nil, interval
if ready_readers || ready_writers
# Handle IO
...
else
# Timeout!
timers.fire
end
end
You can also pause and continue individual timers, or all timers:
paused_timer = timers.every(5) { puts "I was paused" }
paused_timer.pause
10.times { timers.wait } # will not fire paused timer
paused_timer.resume
10.times { timers.wait } # will fire timer
timers.pause
10.times { timers.wait } # will not fire any timers
timers.resume
10.times { timers.wait } # will fire all timers
- Fork it
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create new Pull Request
Released under the MIT license.
Copyright, 2018, by Samuel G. D. Williams.
Copyright, 2016, by Tony Arcieri.
Copyright, 2016, by Jeremy Hinegardner.
Copyright, 2016, by Sean Gregory.
Copyright, 2016, by Chuck Remes.
Copyright, 2016, by Utenmiki.
Copyright, 2016, by Ron Evans.
Copyright, 2016, by Larry Lv.
Copyright, 2016, by Bruno Enten.
Copyright, 2016, by Jesse Cooke.
Copyright, 2016, by Nicholas Evans.
Copyright, 2016, by Dimitrij Denissenko.
Copyright, 2016, by Ryan LeCompte.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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