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Elixir Z-Wave library
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lib/grizzly/inclusions/status_server.ex
defmodule Grizzly.Inclusions.StatusServer do
@moduledoc false
# Server for keeping track of the inclusion status.
# Separating this into it's own process allows for error isolation between the
# inclusion server and the status of the inclusion process. The reason for the
# isolation is if the inclusion server crashes for whatever reason the Z-Wave
# controller will be in an non-operable state and there would be no why for
# the runtime to know this. Therefore, the status is kept separate from the
# more complex code around managing the communication back and forth during
# an inclusion/exclusion of a Z-Wave device. The goal of this is to provide
# system recoverability after a crash during inclusion/exclusion.
use GenServer
alias Grizzly.Inclusions
def start_link(args) do
GenServer.start_link(__MODULE__, args, name: __MODULE__)
end
@doc """
Set the status of the inclusion process
"""
@spec set(Inclusions.status()) :: :ok
def set(status) do
GenServer.call(__MODULE__, {:set, status})
end
@doc """
Get the status of the inclusion process
"""
@spec get() :: Inclusions.status()
def get() do
GenServer.call(__MODULE__, :get)
end
@impl GenServer
def init(_args) do
{:ok, :idle}
end
@impl GenServer
def handle_call({:set, status}, _from, _old_status) do
{:reply, :ok, status}
end
def handle_call(:get, _from, status) do
{:reply, status, status}
end
end