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peep

4.0.0
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Provides an opinionated Telemetry.Metrics reporter that supports StatsD and Prometheus.

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peep lib peep event_handler.ex
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lib/peep/event_handler.ex 

defmodule Peep.EventHandler do

  @moduledoc false



  @compile :inline



  def attach(name) do

    %Peep.Persistent{events_to_metrics: metrics_by_event} = Peep.Persistent.fetch(name)

    module = Peep.Codegen.module(name)



    for {event_name, _metrics} <- metrics_by_event do

      handler_id = handler_id(event_name, name)



      :ok =

        :telemetry.attach(

          handler_id,

          event_name,

          &module.handle_event/4,

          nil

        )



      handler_id

    end

  end



  def detach(handler_ids) do

    for id <- handler_ids, do: :telemetry.detach(id)

    :ok

  end



  defp handler_id(event_name, peep_name) do

    {__MODULE__, peep_name, event_name}

  end

end