render_worker.rb

# A Sidekiq background job worker tha knows how to render Rails views
# Don't worry, I *think* I know what I'm doing ;)
class RenderWorker < AbstractController::Base
  include AbstractController::Rendering
  include AbstractController::Logger  # dependency from actionview calling logging
  include Rails.application.routes.url_helpers
  include Sidekiq::Worker
  
  append_view_path "#{Rails.root}/app/views"  # from AbstractController::ViewPaths

  def perform
    @somevar = "somevalue"  # variables and route helpers available in view
    html = render :action => 'foo'
    Pusher['some_channel'].trigger('some_event', html)
  end
end

w = RenderWorker.new
w.perform

how did this code work out for you?