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ScoutAPM agent for Phoenix & Elixir projects. For more information, visit https://www.scoutapm.com/agents/elixir-phoenix-monitoring.

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scout_apm lib scout_apm logger.ex
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lib/scout_apm/logger.ex 

defmodule ScoutApm.Logger do

  @moduledoc """

  Logger for all ScoutApm modules.



  Defaults to pass-through to the built-in Logger, but checks first if

  the agent is set to monitor: false, or set to a higher log level.



  Due to using Logger.log/2, ScoutApm.Logger calls will not be eliminated

  at compile-time.

  """



  require Logger



  @default_level :info



  @valid_levels [:debug, :info, :warn, :error]



  # If you request to log a message at the left level, check if the

  # logger's current level is one of the right before letting it through

  #

  # For instance, if you ScoutApm.Logger.log(:warn, "foo"), it should be

  # printed if you're at warn, info, or debug levels

  #

  # Msg Lvl       Logger Lvl

  #  |              |

  #  |              |

  #  v              v

  @debug_levels [:debug]

  @info_levels  [:debug, :info]

  @warn_levels  [:debug, :info, :warn]

  @error_levels [:debug, :info, :warn, :error]



  @log_levels %{

    debug: @debug_levels,

    info: @info_levels,

    warn: @warn_levels,

    error: @error_levels

  }



  def log(level, chardata_or_fun, metadata \\ []) when level in @valid_levels do

    log_level = ScoutApm.Config.find(:log_level) || @default_level



    with {:ok, levels} <- logging_enabled() && Map.fetch(@log_levels, level),

         true <- log_level in levels

    do

      Logger.log(level, chardata_or_fun, metadata)

    else

      _ -> :ok

    end

  end



  defp logging_enabled do

    enabled = ScoutApm.Config.find(:monitor)

    key = ScoutApm.Config.find(:key)



    enabled && key

  end

end