genserver health ping

lib/reaper.ex

@@ -13,6 +13,14 @@ defmodule TestcontainersElixir.Reaper do
     GenServer.call(__MODULE__, {:register, filter})
   end
 
+  def ping do
+    try do
+      GenServer.call(__MODULE__, :ping)
+    catch
+      :exit, _reason -> :error
+    end
+  end
+
   @impl true
   def init(connection) do
     {:ok, _} =
@@ -50,6 +58,11 @@ defmodule TestcontainersElixir.Reaper do
     {:reply, register_filter(socket, filter), socket}
   end
 
+  @impl true
+  def handle_call(:ping, _from, socket) do
+    {:reply, :ok, socket}
+  end
+
   defp register_filter(socket, {filter_key, filter_value}) do
     :gen_tcp.send(
       socket,

lib/testcontainers_elixir.ex

@@ -4,12 +4,30 @@ defmodule TestcontainersElixir do
   Documentation for `TestcontainersElixir`.
   """
 
+  alias TestcontainersElixir.Reaper
+  alias DockerEngineAPI.Connection
+  alias DockerEngineAPI.Api
+
   def hello do
-    connection =
-      DockerEngineAPI.Connection.new(base_url: "http+unix://%2Fvar%2Frun%2Fdocker.sock/v1.43")
+    docker_url = "http+unix://%2Fvar%2Frun%2Fdocker.sock/v1.43"
+
+    conn = Connection.new(base_url: docker_url)
+
+    # TODO create a container, gets its container id and pass it to the next line
+
+    :ok = conn |> register_container("some_container_id")
+
+    conn |> Api.Image.image_list()
+  end
+
+  defp register_container(conn, container_id) when is_binary(container_id) do
+    case Reaper.ping() do
+      :ok ->
+        Reaper.register({"id", container_id})
 
-    {:ok, _pid} = connection |> TestcontainersElixir.Reaper.start_link()
-    :ok = TestcontainersElixir.Reaper.register({"id", "some_container_id?"})
-    connection |> DockerEngineAPI.Api.Image.image_list()
+      :error ->
+        {:ok, _} = conn |> Reaper.start_link()
+        Reaper.register({"id", container_id})
+    end
   end
 end