Slides of Andrea Leopardi, member of the @elixir-lang core team, at Elixir Club Ukraine, Kyiv, 28.09.2019 Next conference - http://www.elixirkyiv.club/ Description of presentation If you are writing a stateless web application backed up by a database, there is a good chance Elixir is a great fit. However, this is not where it shines. In this talk, we will discuss how to architect Elixir applications in order to leverage the features of the language and of its runtime. We will look at this both from a lower level, talking about the architecture of processes inside an Elixir application, as well as from a higher perspective of writing Elixir services and architecting systems to play to Elixir's strengths. We will see practical use cases and discuss design patterns. Follow us on social networks @ElixirClubUA and #ElixirClubUA Announce and materials from conf - https://www.fb.me/ElixirClubUA News - https://twitter.com/ElixirClubUA Photo and free atmosphere - https://www.instagram.com/ElixirClubUA *Organizer’s channel - https://t.me/incredevly

31. receive do
:some_message ->
# ...
:other_message ->
# ...
end

32. def handle_info(:some_message, state) do
# ...
end
def handle_info(:other_message, state) do
# ...
end
def handle_info(unknown, state) do
Logger.warn("Unknown message")
{:noreply, state}
end

81. Node.monitor(consumer_node, true)
monitor_ref = Process.monitor(consumer_pid)
send(consumer_pid, {monitor_ref, message})
receive do
{:ack, ^monitor_ref} ->
Process.demonitor(monitor_ref, [:flush])
{:DOWN, ^monitor_ref, _, _, _} ->
give_to_another_consumer(message)
{:nodedown, ^consumer_node} ->
give_to_another_consumer(message)
end