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module ActionDispatch
class Callbacks
include ActiveSupport::Callbacks
define_callbacks :prepare, :before, :after
class << self
# DEPRECATED
alias_method :prepare_dispatch, :prepare
alias_method :before_dispatch, :before
alias_method :after_dispatch, :after
end
# Add a preparation callback. Preparation callbacks are run before every
# request in development mode, and before the first request in production
# mode.
#
# An optional identifier may be supplied for the callback. If provided,
# to_prepare may be called again with the same identifier to replace the
# existing callback. Passing an identifier is a suggested practice if the
# code adding a preparation block may be reloaded.
def self.to_prepare(identifier = nil, &block)
@prepare_callbacks ||= ActiveSupport::Callbacks::CallbackChain.new
callback = ActiveSupport::Callbacks::Callback.new(:prepare, block, :identifier => identifier)
@prepare_callbacks.replace_or_append!(callback)
end
def initialize(app, prepare_each_request = false)
@app, @prepare_each_request = app, prepare_each_request
run_callbacks :prepare
end
def call(env)
run_callbacks :before
run_callbacks :prepare if @prepare_each_request
@app.call(env)
ensure
run_callbacks :after, :enumerator => :reverse_each
end
end
end
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