Run all game processes in a game supervisor

apps/amethyst/lib/api/game.ex

@@ -40,10 +40,25 @@ defmodule Amethyst.API.Game do
     end
   end
 
-  @spec start(Amethyst.API.Game, term()) :: no_return()
+  def child_spec(mod, refs) do
+    %{
+      id: __MODULE__,
+      start: {__MODULE__, :start_link, [mod, refs]}
+    }
+  end
+
+  @spec start(Amethyst.API.Game, term()) :: {:ok, pid}
   def start(mod, refs) do
+    pid = spawn(fn ->
       true = refs |> Enum.all?(fn {_key, pid } -> Process.link(pid) end)
       loop(mod, refs)
+    end)
+    {:ok, pid}
+  end
+  def start_link(mod, refs) do
+    {:ok, pid} = start(mod, refs)
+    Process.link(pid)
+    {:ok, pid}
   end
   defp loop(mod, refs) do
     receive do

apps/amethyst/lib/apps/game_coordinator.ex

@@ -66,7 +66,10 @@ defmodule Amethyst.GameCoordinator do
     # We should gracefully handle situations where we cannot create a game.
     {:ok, refs} = type.instantiate(game_supervisor_pid)
     refs = refs |> Map.put(:game_supervisor, game_supervisor_pid) |> Map.put(:task_supervisor, task_supervisor_pid)
-    pid = spawn(Amethyst.API.Game, :start, [type, refs])
+    {:ok, pid} = DynamicSupervisor.start_child(
+      game_supervisor_pid,
+      Amethyst.API.Game.child_spec(type, refs)
+    )
     games = [{type, pid, []} | games]
     {pid, games}
   end

apps/example_game/lib/example/game.ex

@@ -9,8 +9,9 @@ defmodule Example.Game do
   end
 
   @impl true
-  def login(from, cfg, _state) do
+  def login(from, cfg, refs) do
     Logger.info("Player logged in from #{inspect(from)}: #{inspect(cfg)}")
+    Logger.info("The refs for this game are #{inspect(refs)}")
     :ok
   end
 end