AFAIK Erlang and Elixir have a way to save the state just before the process is stopped. It should be the `trap_exit` flag on a gen_server that guarantees that

AFAIK Erlang and Elixir have a way to save the state just before the process is stopped. It should be the `trap_exit` flag on a gen_server that guarantees that the exit message will be managed. In that handler you can save all your state and resume it when the process restarts.