# File lib/meta_request/app_notifications.rb, line 55
    def self.subscribe
      new.
        subscribe("meta_request.log").
        subscribe("sql.active_record", &SQL_BLOCK).
        subscribe("sql.sequel", &SQL_BLOCK).
        subscribe("render_partial.action_view").
        subscribe("render_template.action_view").
        subscribe("process_action.action_controller.exception").
        subscribe("process_action.action_controller") do |*args|
          name, start, ending, transaction_id, payload = args
          payload[:status] = '500' if payload[:exception]
          Event.new(name, start, ending, transaction_id, payload)
        end.
        subscribe("cache_read.active_support", &CACHE_BLOCK).
        subscribe("cache_generate.active_support", &CACHE_BLOCK).
        subscribe("cache_fetch_hit.active_support", &CACHE_BLOCK).
        subscribe("cache_write.active_support", &CACHE_BLOCK).
        subscribe("cache_delete.active_support", &CACHE_BLOCK).
        subscribe("cache_exist?.active_support", &CACHE_BLOCK)
    end