Configures job uniqueness for this job.

duration controls how long the uniqueness lock is held. After this period expires, the same job can be enqueued again.

key is an array of parameter names (as strings) used to compute the uniqueness key. When omitted, all parameters are used by default.

class SendEmailJob < Mosquito::QueuedJob
  include Mosquito::UniqueJob

  unique_for 1.hour

  param user_id : Int64
  param email_type : String

  def perform
    # ...
  end
end

With a key filter:

class SendEmailJob < Mosquito::QueuedJob
  include Mosquito::UniqueJob

  unique_for 1.hour, key: [:user_id, :email_type]

  param user_id : Int64
  param email_type : String
  param metadata : String

  def perform
    # ...
  end
end