opentelemetry_api

defmodule OpenTelemetry.Meter do
  @moduledoc """

      require OpenTelemetry.Meter

      OpenTelemetry.register_application_meter(Your.Application)

      OpenTelemetry.Meter.new_instruments([...])
      bound = OpenTelemetry.Meter.bind(\"some.latency\", [])
      # measure time spent on some function and then record it
      OpenTelemetry.Meter.record(bound, time)
  """

  defmacro new_instruments(list) do
    quote do
      :ot_meter.new_instruments(:opentelemetry.get_meter(__MODULE__), unquote(list))
    end
  end

  defmacro bind(name, label_set) do
    quote do
      :ot_meter.bind(:opentelemetry.get_meter(__MODULE__), unquote(name), unquote(label_set))
    end
  end

  defmacro release(bound_instrument) do
    quote do
      :ot_meter.release(:opentelemetry.get_meter(__MODULE__), unquote(bound_instrument))
    end
  end

  defmacro record(name, number, label_set) do
    quote do
      :ot_meter.record(:opentelemetry.get_meter(__MODULE__), unquote(name), unquote(number), unquote(label_set))
    end
  end

  defmacro record(bound_instrument, number) do
    quote do
      :ot_meter.record(:opentelemetry.get_meter(__MODULE__), unquote(bound_instrument), unquote(number))
    end
  end

  defmacro record_batch(label_set, measurements) do
    quote do
      :ot_meter.record_batch(:opentelemetry.get_meter(__MODULE__), unquote(label_set), unquote(measurements))
    end
  end
end