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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 internal duration.ex
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lib/scout_apm/internal/duration.ex 

defmodule ScoutApm.Internal.Duration do

  @type t :: %__MODULE__{value: number()}

  @type unit :: :microseconds | :milliseconds | :seconds



  defstruct [

    :value

  ]



  @spec zero() :: t

  def zero(), do: %__MODULE__{value: 0}



  @spec new(number(), unit) :: t

  def new(value, unit) do

    %__MODULE__{value: normalize_value(value, unit)}

  end



  @spec as(t, unit) :: number()

  def as(%__MODULE__{value: value}, :microseconds), do: value

  def as(%__MODULE__{value: value}, :milliseconds), do: value / 1_000

  def as(%__MODULE__{value: value}, :seconds), do: value / 1_000_000



  @spec add(t, t) :: t

  def add(%__MODULE__{value: v1}, %__MODULE__{value: v2}) do

    %__MODULE__{value: v1 + v2}

  end



  @spec subtract(t, t) :: t

  def subtract(%__MODULE__{value: v1}, %__MODULE__{value: v2}) do

    %__MODULE__{value: v1 - v2}

  end



  @spec min(t, t) :: t

  def min(%__MODULE__{value: v1}, %__MODULE__{value: v2}) do

    cond do

      v1 < v2 -> %__MODULE__{value: v1}

      v2 < v1 -> %__MODULE__{value: v2}

      v1 == v2 -> %__MODULE__{value: v1}

    end

  end



  @spec max(t, t) :: t

  def max(%__MODULE__{value: v1}, %__MODULE__{value: v2}) do

    cond do

      v1 > v2 -> %__MODULE__{value: v1}

      v2 > v1 -> %__MODULE__{value: v2}

      v1 == v2 -> %__MODULE__{value: v1}

    end

  end



  defp normalize_value(value, :microseconds), do: value

  defp normalize_value(value, :milliseconds), do: value * 1000

  defp normalize_value(value, :seconds), do: value * 1_000_000

end