Spool

Manage and keep alive pool of processes

Add this line to your application's Gemfile:

gem 'spool'

And then execute:

$ bundle

Or install it yourself as:

$ gem install spool

Worker

loop do
  puts "#{Process.pid} - #{Time.now}"
  sleep 1
end

Pool config

processes 4
command 'ruby worker.rb'
# optional
dir File.dirname(__FILE__)
env VAR1: 'foo', VAR2: 'bar'
pidfile 'pool.pid'
restart_when { |p| p.memory > 512 }

console:~$ spool pool_config.rb

• INT/TERM: quick shutdown, kills all processes immediately
• QUIT: graceful shutdown, waits for processes to finish
• HUP: reloads config file and gracefully restart all processes
• USR2: gracefully restart all processes with current configuration
• TTIN: increment the number of processes by one
• TTOU: decrement the number of processes by one

1. Fork it ( https://github.com/gabynaiman/spool/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request