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0.1.0
Spawn is the core lib for Spawn Actors System
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lib/spawn/cluster/node/registry.ex
defmodule Spawn.Cluster.Node.Registry do
@moduledoc """
Defines a distributed registry for all process
"""
use Horde.Registry
def child_spec() do
%{
id: __MODULE__,
start: {__MODULE__, :start_link, [%{}]}
}
end
@doc false
def start_link(_) do
Horde.Registry.start_link(__MODULE__, [keys: :unique, members: :auto], name: __MODULE__)
end
@impl true
def init(args) do
Horde.Registry.init(args)
end
@doc """
Get Process if this is alive.
"""
def lookup(mod, actor_name) do
Horde.Registry.lookup(__MODULE__, {mod, actor_name})
end
@doc """
Update value meta inside registry
"""
def update_entry_value(mod, actor_name, pid, value) do
GenServer.call(__MODULE__, {:update_value, {mod, actor_name}, pid, value})
end
@doc """
Check if Process is alive.
"""
def is_alive?(mod, actor_name) do
case Horde.Registry.lookup(__MODULE__, {mod, actor_name}) do
[] -> false
_ -> true
end
end
@doc """
List all alive PIDs from given registry module.
"""
@spec list_actor_pids(module()) :: list(pid())
def list_actor_pids(mod) do
Horde.Registry.select(__MODULE__, [{{:"$1", :_, :_}, [], [:"$1"]}])
|> Stream.filter(fn {mod_name, _} -> mod_name == mod end)
# |> Stream.map(&Horde.Registry.match(__MODULE__, &1, :_))
# |> Stream.scan([], fn [{pid, _}], acc -> [pid | acc] end)
# |> Stream.flat_map(& &1)
# |> Stream.uniq()
|> Enum.to_list()
end
end