Resque::Plugins::SerialQueues

This gem is tested on the latest version from Resque 1.x.

Declaring resque queues as serial. Jobs from a serial queue won't be processed more than one at a time event if you have multiple workers / servers. There are similar solutions but none of them worked for me. To lock jobs from running in parallel I used Redis#setnx. This implementation has a few sensitive things:

• Resque::Job.reserve is overriden (here the queue locking is done)
• Added Object#after_perform_unlock_queue_if_serial (here the queue is unlocked)
• Added Object#on_failure_unlock_queue_if_serial (here the queue is unlocked)

I think serial queues are not a scalable. You shouldn't have to have serial queues. This should be a temporary drop-in solution without changing the deployment process. If you really need serial job processing you should start a worker for each serial queue that will listen for jobs only on that queue or migrate to a background processing / messaging tool that provides serial processing out of the box.

Add this line to your application's Gemfile:

gem 'resque-serial-queues'

And then execute:

$ bundle

Or install it yourself as:

$ gem install resque-serial-queues

Create a .rb file in config/initializers

Resque::Plugins::SerialQueues.configure do |config|
  config.serial_queues = [:serial_jobs]
  config.lock_timeout  = 120  #default 3600 seconds
end

and use the declared serial queues in your jobs:

class MyJob

  @queue = :serial_jobs

  def perform(*)
  end

end

1. Fork it ( https://github.com/cristianbica/resque-serial-queues/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