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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_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
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