Mailers with Sidekiq

background_mailer.rb

require 'devise/mailer'
#
# General mailer proxy class to send emails in the background w/ Sidekiq
#
class BackgroundMailer
  def self.reset_password_instructions(record, token, opts={})
    new(Devise::Mailer, :reset_password_instructions, record, token, opts)
  end

  def initialize(mailer_klass, method, *args)
    @mailer_klass = mailer_klass
    @method = method
    @args = args
  end

  def deliver
    @mailer_klass.delay.send(@method, *@args)
  end
end