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phoenix
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0.1.0
Productive. Reliable. Fast. A productive web framework that does not compromise speed or maintainability.
Security advisory:
This version has known vulnerabilities.
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Files
lib/phoenix/socket/pool_supervisor.ex
defmodule Phoenix.Socket.PoolSupervisor do
@moduledoc false
use Supervisor
def start_link(args) do
Supervisor.start_link(__MODULE__, args)
end
def start_child(endpoint, name, key, spec) do
case endpoint.config({:socket, name}) do
ets when not is_nil(ets) ->
partitions = :ets.lookup_element(ets, :partitions, 2)
sup = :ets.lookup_element(ets, :erlang.phash2(key, partitions), 2)
DynamicSupervisor.start_child(sup, spec)
nil ->
raise ArgumentError, """
no socket supervision tree found for #{inspect(name)}.
Ensure your #{inspect(endpoint)} contains a socket mount, for example:
socket "/socket", #{inspect(name)},
websocket: true,
longpoll: true
"""
end
end
@doc false
def start_pooled(ref, i) do
case DynamicSupervisor.start_link(strategy: :one_for_one) do
{:ok, pid} ->
:ets.insert(ref, {i, pid})
{:ok, pid}
{:error, reason} ->
{:error, reason}
end
end
@doc false
def init({endpoint, name, partitions}) do
ref = :ets.new(name, [:public, read_concurrency: true])
:ets.insert(ref, {:partitions, partitions})
Phoenix.Config.permanent(endpoint, {:socket, name}, ref)
children =
for i <- 0..(partitions - 1) do
%{
id: i,
start: {__MODULE__, :start_pooled, [ref, i]},
type: :supervisor,
shutdown: :infinity
}
end
Supervisor.init(children, strategy: :one_for_one)
end
end