Elixir & OTP Microservices Without Pain @justincampbell 

Elixir & OTP Sitting in a tree 

Building $#!+ that doesn't break 

Elixir: Erlang that doesn't suck 

"Microservices" 

Elixir ~ Erlang 

Elixir 4 Tools 4 Modules 4 Functions 4 Pattern-Matching 

Fibonacci Sequence 0 1 1 2 3 5 8 13 21 34 55 

Processes 

OTP Open Telecom Platform 

OTP 4 Erlang 4 protocol for communication between nodes 4 request broker 4 Dialyzer (static analysis) 4 Mnesia (distributed database server) 4 standard lib 

GenServer handle_call(message, {from, ref}, state) handle_cast(message, state) {:reply, reply, state} {:reply, reply, state, timeout} {:reply, reply, state, :hibernate} {:noreply, state} {:noreply, state, timeout} {:noreply, state, :hibernate} {:stop, reason, reply, state} {:stop, reason, state} 

GenServer GenServer.start_link -> init GenServer.call -> handle_call GenServer.cast -> handle_cast 

Spyfall or something 

Services Decision 4 Start with a monolith, move to microservices as needed. 4 Start with a monolith, stay as a monolith. 4 Start with microservices. snowsuit.io/issue07.html 

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Resources 4 elixir-lang.org 4 phoenixframework.org 4 howistart.org/posts/elixir 4 learnyousomeerlang.com 4 elixirsips.com 4 phoenixscreencasts.org