sidekiq-apriori

Prioritization Middleware for Sidekiq

sidekiq-apriori simplifies dynamic prioritization for sidekiq by supplying a simple sidekiq middleware, related active record hooks, & some additional argument handling (for ruby 2 users).

Manual installation is always an option. From the command line:

$ gem install sidekiq-apriori

Or, if you're using bundler, simply include it in your Gemfile:

gem 'sidekiq-apriori'

By default, sidekiq-apriori supports four priorities: immediate, high, nil (default), and low. If you would like to use different priorities you can add something along these lines to (as an example for you railsy folk) your sidekiq initializer:

## config/initializers/sidekiq.rb

Sidekiq::Apriori::PRIORITIES = ['wut', 'huh', 'ok', nil, 'not_even_a_little']

The nil is meaningful insofar as it represents the default priority. Unless you want to disallow unset priorities, leave the nil in.

sidekiq-apriori is inspired by (a response to?) sidekiq-priority, in which the order of the priorities is important. Contrary to the approach taken by sidekiq-priority, sidekiq-apriori uses sidekiq's built in mechanism for configuring the order of processing. As such, the ordering of priorities is accomplished in the sidekiq.yml.

So, for example, if your sidekiq.yml currently looks like this:

## sidekiq.yml

verbose: false
:pidfile: /tmp/sidekiq.pid
:concurrency: 5
:queues:
  - postback
  - background

You might want to change the 'queues' entry to look more like this:

:queues:
  - postback_wut
  - postback_huh
  - postback_ok
  - postback
  - postback_not_even_a_little
  - background

To route an item to a prioritized queue, append an options hash of the form { :priority => 'wut' } to the end of the arguments. If you're using ruby 2 & have included Sidekiq::Apriori::Worker in your worker class then this should be enough. Otherwise, you'll need to update that method to optionally take an additional argument

In addition to the use described in the PRIORITIES section, some tooling is provided for active record classes with priority as an attribute:

## app/models/prioritized.rb

class Prioritized < ActiveRecord::Base
  include Sidekiq::Apriori::Arb

  prioritize do
    self.priority = nil unless
      Sidekiq::Apriori::PRIORITIES.include?(self.priority)

      self.priority = (...)
  end
end

Alternatively, you can pass a method name to prioritize:

## app/models/prioritized.rb

class Prioritized < ActiveRecord::Base
  include Sidekiq::Apriori::Arb

  prioritize using: 'some_method'

  def some_method
    (...)
  end
end

If you're lucky enough to be using ruby 2, you can save yourself some work by including Sidekiq::Apriori::Worker instead of Sidekiq::Worker in your worker classes. This will save you the effort of changing the definition of the classes' perform method & all of its invocations. Sidekiq::Apriori::Worker uses prepend to define a perform which will take an optional hash containing a priority designation.

If you're not using ruby 2, you'll need to redefine your perform method to take an additional, optional argument

sidekiq-apriori is released under the MIT License. Please see the LICENSE file for details.