Level up the Echo Server0.3.0

This should enable the upgrade process to retain connections

- Replace our simple task supervisor with a custom `simple_one_for_one`
  supervisor

- Upgrade the echo server to use a `GenServer` behaviour

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/octonetcat/server_supervisor.ex b/lib/octonetcat/server_supervisor.ex
new file mode 100644
index 0000000..7aa8e37
--- /dev/null
+++ b/lib/octonetcat/server_supervisor.ex
@@ -0,0 +1,23 @@
+defmodule Octonetcat.ServerSupervisor do
+  @moduledoc """
+  Simple One-for-One Supervisor for Socket servers
+  """
+
+  use Supervisor
+
+  def start_link do
+    Supervisor.start_link(__MODULE__, :ok, name: __MODULE__)
+  end
+
+  def init(:ok) do
+    children = [
+      worker(Octonetcat.Echo, [], restart: :temporary)
+    ]
+
+    supervise(children, strategy: :simple_one_for_one)
+  end
+
+  def start_server(socket) do
+    Supervisor.start_child(__MODULE__, [socket])
+  end
+end