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Add unreachable line back plus a note #851

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Sep 25, 2016
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Add unreachable line back plus a note #851

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3 changes: 3 additions & 0 deletions getting-started/mix-otp/task-and-gen-tcp.markdown
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@ defp serve(socket) do
|> write_line(socket)

serve(socket)
loop_acceptor(socket)
end

defp read_line(socket) do
Expand Down Expand Up @@ -79,6 +80,8 @@ write_line(read_line(socket), socket)

The `read_line/1` implementation receives data from the socket using `:gen_tcp.recv/2` and `write_line/2` writes to the socket using `:gen_tcp.send/2`.

Note that `serve/1` is an infinite loop called sequentially inside `loop_acceptor/1`, so the tail call to `loop_acceptor/1` is never reached and could be avoided. However, as we shall see, we will need to execute `serve/1` in a separate process, so we will need that tail call soon.

This is pretty much all we need to implement our echo server. Let's give it a try!

Start an IEx session inside the `kv_server` application with `iex -S mix`. Inside IEx, run:
Expand Down