require "active_support/core_ext/string/inflections" module ActiveJob # The ActiveJob::QueueAdapter module is used to load the # correct adapter. The default queue adapter is the +:async+ queue. module QueueAdapter #:nodoc: extend ActiveSupport::Concern included do class_attribute :_queue_adapter_name, instance_accessor: false, instance_predicate: false class_attribute :_queue_adapter, instance_accessor: false, instance_predicate: false self.queue_adapter = :async end # Includes the setter method for changing the active queue adapter. module ClassMethods # Returns the backend queue provider. The default queue adapter # is the +:async+ queue. See QueueAdapters for more information. def queue_adapter _queue_adapter end def queue_adapter_name _queue_adapter_name end # Specify the backend queue provider. The default queue adapter # is the +:async+ queue. See QueueAdapters for more # information. def queue_adapter=(name_or_adapter_or_class) interpret_adapter(name_or_adapter_or_class) end private def interpret_adapter(name_or_adapter_or_class) case name_or_adapter_or_class when Symbol, String assign_adapter(name_or_adapter_or_class.to_s, ActiveJob::QueueAdapters.lookup(name_or_adapter_or_class).new) else if queue_adapter?(name_or_adapter_or_class) adapter_name = "#{name_or_adapter_or_class.class.name.demodulize.remove('Adapter').underscore}" assign_adapter(adapter_name, name_or_adapter_or_class) else raise ArgumentError end end end def assign_adapter(adapter_name, queue_adapter) self._queue_adapter_name = adapter_name self._queue_adapter = queue_adapter end QUEUE_ADAPTER_METHODS = [:enqueue, :enqueue_at].freeze def queue_adapter?(object) QUEUE_ADAPTER_METHODS.all? { |meth| object.respond_to?(meth) } end end end end