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Turn any Ruby object into a daemon controlling an army of sponges.
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When I build workers, I want them to be like an army of spongebobs, always stressed and eager to work. sponges helps you build this army of sponges, to control them, and, well, to kill them gracefully. Making them stressed and eager to work is your job. :)

Internally, sponges strongly relies on Unix signals.

Is it any good?


Production ready ?

Not yet, but soon.


Ruby 1.9.2 (or superior) and Redis are required.

Install it with rubygems:

gem install sponges

With bundler, add it to your Gemfile:

gem "sponges"


In a file called example.rb:

# The worker class is the one you want to daemonize.
require 'sponges'

class Worker
  def run
    # Trap the HUP signal, set a boolean to true.
    trap(:HUP) { "HUP signal trapped, clean stop."
      @hup = true
    if @hup # is true, we need to shutdown this worker "HUP signal trapped, shutdown..."
      exit 0 # everything's fine, we can exit
    else # this worker can continue its work
      sleep rand(20)

Sponges.configure do |config|
  config.worker        =           # mandatory
  config.worker_name   = "bob"                # mandatory
  config.worker_method = :run                 # mandatory
  config.worker_args   = {first: true}        # mandatory
  config.logger        =   # optionnal
  config.redis         =            # optionnal


See the help message :

ruby example.rb

Start workers :

ruby example.rb start

Start workers and daemonize them:

ruby example.rb start -d

Start 8 instances of the worker and daemonize them:

ruby example.rb start -d -s 8

Retart gracefully 4 instances of the worker and daemonize them:

ruby example.rb restart -g -d -s 4

Stop workers with a QUIT signal :

ruby example.rb stop

Stop workers with a HUP signal :

ruby example.rb stop -g

In this case, you will have to trap the HUP signal, and handle a clean stop from each workers. The point is to wait for a task to be done before quitting.

Increment worker's pool size :

ruby example.rb increment # will add a worker to the pool.

Decrement worker's pool size :

ruby example.rb decrement # will remove a worker to the pool.

Show a list of workers and their children.

ruby example.rb list


  • More specs.
  • Check on OSX.


MIT. See LICENSE for further details.

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