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A composable, real time, market data and trade execution toolkit
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lib/tai/settings.ex
defmodule Tai.Settings do
@moduledoc """
Global settings
"""
use GenServer
@enforce_keys [:send_orders]
defstruct [:send_orders]
def start_link(%Tai.Settings{} = settings) do
{:ok, pid} = GenServer.start_link(__MODULE__, settings, name: __MODULE__)
GenServer.call(pid, :create_ets_table)
{:ok, pid}
end
def init(state) do
{:ok, state}
end
def handle_call(:create_ets_table, _from, state) do
create_ets_table()
upsert_items(state)
{:reply, :ok, state}
end
def handle_call({:set_send_orders, val}, _from, state) do
:ets.insert(__MODULE__, {:send_orders, val})
{:reply, :ok, state}
end
def all do
[{:send_orders, send_orders}] = :ets.lookup(__MODULE__, :send_orders)
%Tai.Settings{
send_orders: send_orders
}
end
def disable_send_orders! do
GenServer.call(__MODULE__, {:set_send_orders, false})
end
def enable_send_orders! do
GenServer.call(__MODULE__, {:set_send_orders, true})
end
def send_orders? do
[{:send_orders, send_orders}] = :ets.lookup(__MODULE__, :send_orders)
send_orders
end
def from_config(%Tai.Config{} = config) do
%Tai.Settings{send_orders: config.send_orders}
end
defp create_ets_table do
:ets.new(__MODULE__, [:set, :protected, :named_table])
end
defp upsert_items(settings) do
settings
|> Map.to_list()
|> Enum.filter(fn {k, _} -> k != :__struct__ end)
|> Enum.each(fn item -> :ets.insert(__MODULE__, item) end)
end
end