How to create dynamic supervisor with registry

dynamic-supervisor-via-registry.ex

# Your actual dynamic worker
defmodule Awesome.Worker do
  use GenServer, restart: :transient
  alias Awesome.Hero

  # Client
  def start_link(%Hero{} = hero), do:
    GenServer.start_link(@mod, hero, name: proc_name(hero))

  defp proc_name(%Hero{name: name}), do:
    {:via, Registry, {HeroRegistry, "v-#{name}"}}
end

# Supervisor manages your workers
defmodule Awesome.HeroSupervisor do
  use DynamicSupervisor
  alias Awesome.Worker

  # Client
  def start_link(arg), do:
    DynamicSupervisor.start_link(@mod, arg, name: @mod)

  def join(%Hero{} = hero), do:
    DynamicSupervisor.start_child(@mod, {HeroWorker, hero})

  # Server
  def init(_arg), do:
    DynamicSupervisor.init(strategy: :one_for_one)
end

# application.ex
defmodule Awesome.Application do
  # ...
  def start(_type, _args) do
    children = [
      {Awesome.HeroSupervisor, []},
      {Registry, keys: :unique, name: HeroRegistry}
    ]

    Supervisor.start_link(children, @opts)
  end
end

defmodule Awesome.Worker do
  use GenServer, restart: :transient
  alias Awesome.Hero

  # Client
  def start_link(%Hero{} = hero), do:
    GenServer.start_link(@mod, hero, name: proc_name(hero))

  defp proc_name(%Hero{name: name}), do:
    {:via, Registry, {HeroRegistry, "v-#{name}"}}
end