50 lines
1.4 KiB
Elixir
50 lines
1.4 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Gun.ConnectionPool.WorkerSupervisor do
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@moduledoc "Supervisor for pool workers. Does not do anything except enforce max connection limit"
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use DynamicSupervisor
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def start_link(opts) do
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DynamicSupervisor.start_link(__MODULE__, opts, name: __MODULE__)
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end
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def init(_opts) do
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DynamicSupervisor.init(
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strategy: :one_for_one,
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max_children: Pleroma.Config.get([:connections_pool, :max_connections])
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)
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end
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def start_worker(opts, retry \\ false) do
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case DynamicSupervisor.start_child(__MODULE__, {Pleroma.Gun.ConnectionPool.Worker, opts}) do
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{:error, :max_children} ->
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if retry or free_pool() == :error do
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:telemetry.execute([:pleroma, :connection_pool, :provision_failure], %{opts: opts})
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{:error, :pool_full}
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else
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start_worker(opts, true)
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end
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res ->
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res
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end
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end
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defp free_pool do
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wait_for_reclaimer_finish(Pleroma.Gun.ConnectionPool.Reclaimer.start_monitor())
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end
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defp wait_for_reclaimer_finish({pid, mon}) do
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receive do
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{:DOWN, ^mon, :process, ^pid, :no_unused_conns} ->
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:error
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{:DOWN, ^mon, :process, ^pid, :normal} ->
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:ok
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end
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end
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end
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