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require "active_job/queue_adapters/inline_adapter"
require "active_support/core_ext/class/attribute"
require "active_support/core_ext/string/inflections"
module ActiveJob
# The <tt>ActiveJob::QueueAdapter</tt> 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, 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
# 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)
self._queue_adapter = 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
ActiveJob::QueueAdapters.lookup(name_or_adapter_or_class).new
else
if queue_adapter?(name_or_adapter_or_class)
name_or_adapter_or_class
elsif queue_adapter_class?(name_or_adapter_or_class)
ActiveSupport::Deprecation.warn "Passing an adapter class is deprecated " \
"and will be removed in Rails 5.1. Please pass an adapter name " \
"(.queue_adapter = :#{name_or_adapter_or_class.name.demodulize.remove('Adapter').underscore}) " \
"or an instance (.queue_adapter = #{name_or_adapter_or_class.name}.new) instead."
name_or_adapter_or_class.new
else
raise ArgumentError
end
end
end
QUEUE_ADAPTER_METHODS = [:enqueue, :enqueue_at].freeze
def queue_adapter?(object)
QUEUE_ADAPTER_METHODS.all? { |meth| object.respond_to?(meth) }
end
def queue_adapter_class?(object)
object.is_a?(Class) && QUEUE_ADAPTER_METHODS.all? { |meth| object.public_method_defined?(meth) }
end
end
end
end
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