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lib/lcd_display/otp/process_registry.ex
defmodule LcdDisplay.ProcessRegistry do
@moduledoc """
Manages processes.
"""
@spec child_spec(any) :: Supervisor.child_spec()
def child_spec(_args) do
Supervisor.child_spec(
Registry,
id: __MODULE__,
start: {__MODULE__, :start_link, []}
)
end
@doc """
Returns a standardized via-tuple for this registry.
## Examples
iex> ProcessRegistry.via_tuple(SomeKey)
{:via, Registry, {ProcessRegistry, SomeKey}}
"""
@spec via_tuple(any) :: {:via, Registry, {LcdDisplay.ProcessRegistry, any}}
def via_tuple(key) do
{:via, Registry, {__MODULE__, key}}
end
@doc """
Returns a PID or :undefined.
"""
@spec whereis_name(any) :: :undefined | pid
def whereis_name(key) when is_tuple(key) do
Registry.whereis_name({__MODULE__, key})
end
@doc """
Starts a unique registry.
"""
@spec start_link :: {:ok, pid} | {:error, any}
def start_link() do
Registry.start_link(keys: :unique, name: __MODULE__)
end
end