SidekiqUniqueJobs

The missing unique jobs for sidekiq

Installation

Add this line to your application's Gemfile:

gem 'sidekiq-unique-jobs'

And then execute:

$ bundle

Or install it yourself as:

$ gem install sidekiq-unique-jobs

Usage

All that is required is that you specifically set the sidekiq option for unique to true like below:

sidekiq_options unique: true

For jobs scheduled in the future it is possible to set for how long the job should be unique. The job will be unique for the number of seconds configured (default 30 minutes) or until the job has been completed. Thus, the job will be unique for the shorter of the two. Note that Sidekiq versions before 3.0 will remove job keys after an hour, which means jobs can remain unique for at most an hour.

*If you want the unique job to stick around even after it has been successfully processed then just set the unique_unlock_order to anything except :before_yield or :after_yield (unique_unlock_order = :never)

You can also control the expiration length of the uniqueness check. If you want to enforce uniqueness over a longer period than the default of 30 minutes then you can pass the number of seconds you want to use to the sidekiq options:

sidekiq_options unique: true, unique_job_expiration: 120 * 60 # 2 hours

Requiring the gem in your gemfile should be sufficient to enable unique jobs.

Finer Control over Uniqueness

Sometimes it is desired to have a finer control over which arguments are used in determining uniqueness of the job, and others may be transient. For this use-case, you need to set SidekiqUniqueJobs.config.unique_args_enabled to true in an initializer, and then defined either unique_args method, or a ruby proc.

The unique_args method need to return an array of values to use for uniqueness check.

SidekiqUniqueJobs.config.unique_args_enabled = true

The method or the proc can return a modified version of args without the transient arguments included, as shown below:

class UniqueJobWithFilterMethod
  include Sidekiq::Worker
  sidekiq_options unique: true,
                  unique_args: :unique_args

  def self.unique_args(name, id, options)
    [ name, options[:type] ]
  end

  ...

end

class UniqueJobWithFilterProc
  include Sidekiq::Worker
  sidekiq_options unique: true,
                  unique_args: ->(args) { [ args.first ] }

  ...

end

Note that objects passed into workers are converted to JSON after running through client middleware. In server middleware, the JSON is passed directly to the worker #perform method. So, you may run into issues where the arguments are different when enqueuing than they are when performing. Your unique_args method may need to account for this.

Unlock Ordering

By default the server middleware will release the worker lock after yielding to the next middleware or worker. Alternatively, this can be changed by passing the unique_unlock_order option:

class UniqueJobWithFilterMethod
  include Sidekiq::Worker
  sidekiq_options unique: true,
                  unique_unlock_order: :before_yield

  ...

end

Testing

SidekiqUniqueJobs uses mock_redis for inline testing. Due to complaints about having that as a runtime dependency it was made a development dependency so if you are relying on inline testing you will have to add gem 'mock_redis' to your Gemfile.

Contributing

1. Fork it
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 new Pull Request

Contributors

• https://github.com/salrepe
• https://github.com/rickenharp
• https://github.com/sax
• https://github.com/eduardosasso
• https://github.com/KensoDev
• https://github.com/adstage-david