Add :mimzy
to your list of dependencies in mix.exs
:
defp deps do
[
{:mimzy, "~> 2.1"}
]
end
Mimzy is a finite-state machine library for Elixir. Here is an example:
defmodule ButtonMachine do
@behaviour Mimzy
def handle_event(:create),
do: _id = ButtonRepo.insert(count: 0, state: :off)
def handle_event(id, event),
do: Mimzy.handle_event(id, event, __MODULE__)
def init(id) do
button = ButtonRepo.get_and_lock(id)
{:cont, button.state, button.count}
end
def handle_event(:off, :push, id, count) do
:ok = ButtonRepo.update_and_unlock(id, count: count + 1, state: :on)
:on
end
def handle_event(:on, :push, id, _count) do
:ok = ButtonRepo.update_and_unlock(id, state: :off)
:off
end
def handle_event(_state, :get_count, id, count) do
:ok = ButtonRepo.unlock(id)
count
end
end
This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.