easy-going-rails/lib/semantic/log_subscriber.rb

module Semantic
  class LogSubscriber < ActiveSupport::LogSubscriber
    include SemanticLogger::Loggable
    # def logger = SemanticLogger['Rails']

    SESSION_KEY = 'toto1'.freeze

    def initialize
    end

    def start_processing(event)
      request = event.payload[:request]
      rack_session = event.payload[:headers]['rack.session']
      session_value = rack_session.fetch(SESSION_KEY, 'EMPTY')

      format = event.payload[:format]
      format = format.to_s.upcase if format.is_a?(Symbol)
      format = '*/*' if format.nil?

      SemanticLogger.tagged(session_value) do
        logger.info("Started #{request.raw_request_method} #{request.filtered_path}")
        logger.debug("Processing by #{event.payload[:controller]}##{event.payload[:action]} as #{format}")
      end
    end
  end
end