Extract QueueName into its own module

lib/active_job/base.rb

 require 'active_job/queue_adapter'
-require 'active_job/queue_adapters/inline_adapter'
-require 'active_support/core_ext/string/inflections'
+require 'active_job/queue_name'
 
 module ActiveJob
   class Base
     extend QueueAdapter
+    extend QueueName
 
-    cattr_accessor(:queue_base_name) { "active_jobs" }
-    cattr_accessor(:queue_name)      { queue_base_name }
-
-    class << self
-      def enqueue(*args)
-        queue_adapter.queue self, *args
-      end
-
-      def queue_as(part_name)
-        self.queue_name = "#{queue_base_name}_#{part_name}"
-      end
+    def self.enqueue(*args)
+      queue_adapter.queue self, *args
     end
   end
 end
\ No newline at end of file

lib/active_job/queue_name.rb

+module ActiveJob
+  module QueueName
+    mattr_accessor(:queue_base_name) { "active_jobs" }
+    mattr_accessor(:queue_name)      { queue_base_name }
+
+    def queue_as(part_name)
+      self.queue_name = "#{queue_base_name}_#{part_name}"
+    end
+  end
+end
\ No newline at end of file