basic-rails/app/controllers/welcome_controller.rb

class WelcomeController < ApplicationController
  def index
    # logger.measure_error "Took too long to complete", min_duration: 3000 do
    #   logger.debug("Debugging information to aid with problem determination")
    #   logger.info("Informational message such as request received\nline 2\nline3")
    #   logger.warn("Warn about something in the system")
    #   logger.error("An error occurred during processing")
    #   logger.fatal("Oh no something really bad happened")

    #   logger.measure_info "Called external interface" do
    #     sleep 0.1 # Code to call external service ...
    #   end

    #   SemanticLogger.tagged(user: "Jack", zip_code: 12345) do
    #     # All log entries in this block will include the above named tags
    #     logger.debug("Hello World")
    #   end

    logger.info("efficient logging for dark theme")
    # raise "exception"
    # end
  end
end