sidekiq for processing

Gemfile

@@ -12,7 +12,7 @@ gem 'rubyzip'
 gem 'rack-recaptcha',     require: 'rack/recaptcha'
 gem 'rmagick',            require: nil
 gem 'selenium-webdriver', require: nil
-gem 'backburner'
+gem 'sidekiq'
 gem 'ago'
 
 platform :mri do

Gemfile.lock

@@ -5,18 +5,16 @@ GEM
     ago (0.1.5)
       hoe (>= 1.12.2)
     ansi (1.4.3)
-    backburner (0.4.2)
-      beaneater (~> 0.3.1)
-      dante (~> 0.1.5)
     bcrypt-ruby (3.0.1)
-    beaneater (0.3.1)
     builder (3.2.0)
+    celluloid (0.14.1)
+      timers (>= 1.0.0)
     childprocess (0.3.9)
       ffi (~> 1.0, >= 1.0.11)
     coderay (1.0.9)
     columnize (0.3.6)
+    connection_pool (1.1.0)
     crack (0.3.2)
-    dante (0.1.5)
     debugger (1.6.0)
       columnize (>= 0.3.1)
       debugger-linecache (~> 1.2.0)
@@ -74,6 +72,8 @@ GEM
     raindrops (0.10.0)
     rake (10.0.4)
     redis (3.0.4)
+    redis-namespace (1.3.0)
+      redis (~> 3.0.0)
     rmagick (2.13.2)
     rubyzip (0.9.9)
     selenium-webdriver (2.33.0)
@@ -87,6 +87,12 @@ GEM
       sequel (>= 3.39.0)
     shotgun (0.9)
       rack (>= 1.0)
+    sidekiq (2.12.4)
+      celluloid (>= 0.14.1)
+      connection_pool (>= 1.0.0)
+      json
+      redis (>= 3.0)
+      redis-namespace
     simplecov (0.7.1)
       multi_json (~> 1.0)
       simplecov-html (~> 0.7.1)
@@ -105,6 +111,7 @@ GEM
     slop (3.4.5)
     temple (0.6.5)
     tilt (1.4.1)
+    timers (1.1.0)
     unicorn (4.6.2)
       kgio (~> 2.6)
       rack
@@ -119,7 +126,6 @@ PLATFORMS
 
 DEPENDENCIES
   ago
-  backburner
   bcrypt-ruby
   fabrication
   faker
@@ -147,6 +153,7 @@ DEPENDENCIES
   sequel
   sequel_pg
   shotgun
+  sidekiq
   simplecov
   sinatra
   sinatra-flash

Rakefile

@@ -1,5 +1,4 @@
 require "rake/testtask"
-require 'backburner/tasks'
 
 task :environment do
   require './environment.rb'
@@ -37,5 +36,7 @@ end
 
 desc 'Update screenshots'
 task :update_screenshots => [:environment] do
-  Site.select(:username).filter(is_banned: false).filter(~{updated_at: nil}).order(:updated_at.desc).all.collect {|s| Backburner.enqueue ScreenshotJob, s.username }
+  Site.select(:username).filter(is_banned: false).filter(~{updated_at: nil}).order(:updated_at.desc).all.collect {|s|
+    ScreenshotWorker.perform_async s.username
+  }
 end

app.rb

@@ -234,7 +234,7 @@ post '/site_files/upload' do
   FileUtils.mv params[:newfile][:tempfile].path, dest_path
   File.chmod(0640, dest_path) if self.class.production?
 
-  Backburner.enqueue(ScreenshotJob, current_site.username) if sanitized_filename =~ /index\.html/
+  ScreenshotWorker.perform_async(current_site.username) if sanitized_filename =~ /index\.html/
 
   current_site.update updated_at: Time.now
 
@@ -301,7 +301,7 @@ post '/site_files/save/:filename' do |filename|
   FileUtils.mv tmpfile.path, dest_path
   File.chmod(0640, dest_path) if self.class.production?
 
-  Backburner.enqueue(ScreenshotJob, current_site.username) if sanitized_filename =~ /index\.html/
+  ScreenshotWorker.perform_async(current_site.username) if sanitized_filename =~ /index\.html/
 
   current_site.update updated_at: Time.now
 

environment.rb

@@ -18,10 +18,6 @@ DB = Sequel.connect $config['database'], sslmode: 'disable', max_connections: $c
 
 Dir.glob('workers/*.rb').each {|w| require File.join(DIR_ROOT, "/#{w}") }
 
-Backburner.configure do |config|
-  config.default_worker = Backburner::Workers::ThreadsOnFork
-end
-
 if defined?(Pry)
   Pry.commands.alias_command 'c', 'continue'
   Pry.commands.alias_command 's', 'step'
@@ -50,12 +46,6 @@ if ENV['RACK_ENV'] == 'development' && Server.count == 0
   Server.create ip: '127.0.0.1', slots_available: 999999
 end
 
-Backburner.configure do |config|
-  config.max_job_retries = 10
-  config.retry_delay = 200
-  config.respond_timeout = 120
-end
-
 class Sinatra::Base
   alias_method :render_original, :render
   def render(engine, data, options = {}, locals = {}, &block)

workers/screenshot_worker.rb

@@ -1,12 +1,10 @@
 require 'selenium-webdriver'
 require 'RMagick'
 
-class ScreenshotJob
+class ScreenshotWorker
-  include Backburner::Queue
+  include Sidekiq::Worker
 
-  queue_priority 1000
+  def perform(username)
-
-  def self.perform(username)
     screenshot = Tempfile.new 'neocities_screenshot'
     screenshot.close