defmodule Demo.Lock do use GenServer def init(:ok) do state = {:unlocked, nil} {:ok, state} end def handle_call({:lock, client}, _from, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end end
defmodule Demo.Lock do use GenServer def init(:ok) do state = {:unlocked, nil} {:ok, state} end def handle_call({:lock, client}, _from, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use GenServer def init(:ok) do state = {:unlocked, nil} {:ok, state} end def handle_call({:lock, client}, _from, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use GenServer def init(:ok) do {:ok, {:unlocked, nil}} end def handle_call({:lock, client}, _from, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use Raft.StateMachine def init(:ok) do {:ok, {:unlocked, nil}} end def handle_call({:lock, client}, _from, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use Raft.StateMachine def init(:ok) do {:unlocked, nil} end def handle_call({:lock, client}, _from, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use Raft.StateMachine def init(:ok) do {:unlocked, nil} end def handle_write({:lock, client}, _from, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use Raft.StateMachine def init(:ok) do {:unlocked, nil} end def handle_write({:lock, client}, {:unlocked, nil}) do {:reply, :ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use Raft.StateMachine def init(:ok) do {:unlocked, nil} end def handle_write({:lock, client}, {:unlocked, nil}) do {:ok, {:locked, client}} end def handle_call({:lock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use Raft.StateMachine def init(:ok) do {:unlocked, nil} end def handle_write({:lock, client}, {:unlocked, nil}) do {:ok, {:locked, client}} end def handle_write({:lock, client}, {:locked, other_client}) do {:error, {:locked, other_client}} end def handle_call({:unlock, client}, _from, {:locked, client}) do {:reply, :ok, {:unlocked, nil}} end def handle_call({:unlock, client}, _from, {:locked, other_client}) do {:reply, :error, {:locked, other_client}} end end
defmodule Demo.Lock do use Raft.StateMachine def init(:ok) do {:unlocked, nil} end def handle_write({:lock, client}, {:unlocked, nil}) do {:ok, {:locked, client}} end def handle_write({:lock, client}, {:locked, other_client}) do {:error, {:locked, other_client}} end def handle_write({:unlock, client}, {:locked, client}) do {:ok, {:unlocked, nil}} end def handle_write({:unlock, client}, {:locked, other_client}) do {:error, {:locked, other_client}} end end
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