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require 'active_support/core_ext/logger'
module AbstractController
module Logger
extend ActiveSupport::Concern
# A class that allows you to defer expensive processing
# until the logger actually tries to log. Otherwise, you are
# forced to do the processing in advance, and send the
# entire processed String to the logger, which might
# just discard the String if the log level is too low.
#
# TODO: Require that Rails loggers accept a block.
class DelayedLog
def initialize(&blk)
@blk = blk
end
def to_s
@blk.call
end
alias to_str to_s
end
included do
cattr_accessor :logger
end
# Override process_action in the AbstractController::Base
# to log details about the method.
def process_action(action)
super
if logger
log = DelayedLog.new do
"\n\nProcessing #{self.class.name}\##{action_name} " \
"to #{request.formats} " \
"(for #{request_origin}) [#{request.method.to_s.upcase}]"
end
logger.info(log)
end
end
private
def request_origin
# this *needs* to be cached!
# otherwise you'd get different results if calling it more than once
@request_origin ||= "#{request.remote_ip} at #{Time.now.to_s(:db)}"
end
end
end
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