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Money functions for operations on and localization of a money data type with support for ISO 4217 currencies and ISO 24165 digial tokens (crypto currencies).

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ex_money lib money exchange_rates cache exchange_rates_cache_dets.ex
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lib/money/exchange_rates/cache/exchange_rates_cache_dets.ex 

defmodule Money.ExchangeRates.Cache.Dets do

  @moduledoc """

  Money.ExchangeRates.Cache implementation for

  :dets

  """



  @behaviour Money.ExchangeRates.Cache



  @ets_table :exchange_rates

  @dets_path Path.join(:code.priv_dir(:ex_money), ".exchange_rates")

             |> String.to_charlist()



  require Logger

  require Money.ExchangeRates.Cache.EtsDets

  Money.ExchangeRates.Cache.EtsDets.define_common_functions()



  def init do

    {:ok, name} = :dets.open_file(@ets_table, file: @dets_path)

    name

  end



  def terminate do

    :dets.close(@ets_table)

  end



  def get(key) do

    case :dets.lookup(@ets_table, key) do

      [{^key, value}] -> value

      [] -> nil

    end

  end



  def put(key, value) do

    :dets.insert(@ets_table, {key, value})

    value

  end

end