Updated doc init script and que #2724

lib/daemons/que.rb

@@ -8,11 +8,36 @@ Dir.chdir(root)
 
 require File.join(root, "config", "environment")
 
-@running = true
-Signal.trap("TERM") do 
-  @running = false
+# from que gem rake task
+if defined?(::Rails) && Rails.respond_to?(:application)
+  # ActiveSupport's dependency autoloading isn't threadsafe, and Que uses
+  # multiple threads, which means that eager loading is necessary. Rails
+  # explicitly prevents eager loading when the environment task is invoked,
+  # so we need to manually eager load the app here.
+  Rails.application.eager_load!
 end
 
-# rubocop: disable Style/WhileUntilDo
-while @running do
+Que.logger.level  = Logger.const_get((ENV['QUE_LOG_LEVEL'] || 'INFO').upcase)
+Que.worker_count  = 1
+Que.wake_interval = (ENV['QUE_WAKE_INTERVAL'] || 0.1).to_f
+Que.mode          = :async
+
+# When changing how signals are caught, be sure to test the behavior with
+# the rake task in tasks/safe_shutdown.rb.
+
+stop = false
+%w( INT TERM ).each do |signal|
+  trap(signal) {stop = true}
+end
+
+at_exit do
+  $stdout.puts "Finishing Que's current jobs before exiting..."
+  Que.worker_count = 0
+  Que.mode = :off
+  $stdout.puts "Que's jobs finished, exiting..."
+end
+
+loop do
+  sleep 0.01
+  break if stop
 end