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telemetria

0.2.0
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The helper application that simplifies and standardizes telemetry usage.

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telemetria lib instrumenter.ex
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lib/instrumenter.ex 

defmodule Telemetria.Instrumenter do

  @moduledoc false



  require Logger

  use Boundary, deps: [Telemetria.ConfigProvider], exports: []



  @json_config Telemetria.ConfigProvider.json_config!()



  @otp_app Application.get_env(:telemetria, :otp_app, [])

  @spec otp_app :: binary()

  def otp_app, do: to_string(Keyword.get(@json_config, :otp_app, @otp_app))



  @events Application.fetch_env!(:telemetria, :events)

  @spec events :: [[atom()]]

  def events, do: Enum.to_list(MapSet.new(Keyword.get(@json_config, :events, []) ++ @events))



  def setup do

    Application.stop(:telemetry)

    Application.start(:telemetry)

    :telemetry.attach_many(otp_app(), events(), &handle_event/4, nil)

  end



  def handle_event(event, measurements, context, config) do

    {m, f, 4} = Application.get_env(:telemetria, :handler, {Telemetria.Handler, :handle_event, 4})

    apply(m, f, [event, measurements, context, config])

  end

end