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module ActionDispatch
# ActionDispatch::Reloader provides prepare and cleanup callbacks,
# intended to assist with code reloading during development.
#
# Prepare callbacks are run before each request, and cleanup callbacks
# after each request. In this respect they are analogs of ActionDispatch::Callback's
# before and after callbacks. However, cleanup callbacks are not called until the
# request is fully complete -- that is, after #close has been called on
# the response body. This is important for streaming responses such as the
# following:
#
# self.response_body = -> (response, output) do
# # code here which refers to application models
# end
#
# Cleanup callbacks will not be called until after the response_body lambda
# is evaluated, ensuring that it can refer to application models and other
# classes before they are unloaded.
#
# By default, ActionDispatch::Reloader is included in the middleware stack
# only in the development environment; specifically, when +config.cache_classes+
# is false. Callbacks may be registered even when it is not included in the
# middleware stack, but are executed only when <tt>ActionDispatch::Reloader.prepare!</tt>
# or <tt>ActionDispatch::Reloader.cleanup!</tt> are called manually.
#
class Reloader < Executor
def self.to_prepare(*args, &block)
ActiveSupport::Reloader.to_prepare(*args, &block)
end
def self.to_cleanup(*args, &block)
ActiveSupport::Reloader.to_complete(*args, &block)
end
def self.prepare!
default_reloader.prepare!
end
def self.cleanup!
default_reloader.reload!
end
class << self
attr_accessor :default_reloader # :nodoc:
deprecate to_prepare: "use ActiveSupport::Reloader.to_prepare instead",
to_cleanup: "use ActiveSupport::Reloader.to_complete instead",
prepare!: "use Rails.application.reloader.prepare! instead",
cleanup!: "use Rails.application.reloader.reload! instead of cleanup + prepare"
end
self.default_reloader = ActiveSupport::Reloader
end
end
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