Notes: 39 Last Week

Where are we? #

• Last week of classes
• Final presentations next week
• Block is Friday, Dec 13 8:00 - 10:30 AM, this room.
• We don’t need 2.5 hours, so we’ll use 9:00 - 10:30 am; be on time at 9.

Presentation requirements:

• Team presenations
  • Should answer some provided questions for the whole team.
• Each member will present ansers to a couple of individual questions as part of the presentation.
• Two separate grades: Team and personal, each covers both the presentation itself and an evaluation of the project being presented.

Next lecture:

• Semester review.

Project statuses? #

• What’s still missing?
• Can you get it done for Friday to leave time to debug, polish, and work on the presentation?
• Is the team stuck on any technical issue? Is there something I can try to help with.

Today: Distributed Elixir #

# server.ex
defmodule Server do
  use GenServer

  def start_link() do
    GenServer.start_link(__MODULE__, %{}, name: :server)
  end

  @impl true
  def init(_) do
    {:ok, %{}}
  end

  @impl true
  def handle_call(:hi, from, state) do
    IO.inspect({:hi, from})
    {:reply, :ok, state}
  end
end

Two separate terminal windows:

• iex --sname node1
• iex --sname node2

On node1

• Node.connect(:“node2@icewing”)

On node2

• c("./server.ex")
• Server.start_link()
• GenServer.call(:server, :hi)
• Node.self()

On node1

• GenServer.call({:server, :“node2@host”, :hi)