55 lines
1.3 KiB
Elixir
55 lines
1.3 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.Plugs.RateLimiter.LimiterSupervisor do
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use DynamicSupervisor
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import Cachex.Spec
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def start_link(init_arg) do
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DynamicSupervisor.start_link(__MODULE__, init_arg, name: __MODULE__)
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end
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def add_or_return_limiter(limiter_name, expiration) do
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result =
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DynamicSupervisor.start_child(
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__MODULE__,
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%{
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id: String.to_atom("rl_#{limiter_name}"),
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start:
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{Cachex, :start_link,
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[
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limiter_name,
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[
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expiration:
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expiration(
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default: expiration,
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interval: check_interval(expiration),
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lazy: true
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)
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]
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]}
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}
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)
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case result do
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{:ok, _pid} = result -> result
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{:error, {:already_started, pid}} -> {:ok, pid}
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_ -> result
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end
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end
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@impl true
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def init(_init_arg) do
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DynamicSupervisor.init(strategy: :one_for_one)
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end
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defp check_interval(exp) do
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(exp / 2)
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|> Kernel.trunc()
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|> Kernel.min(5000)
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|> Kernel.max(1)
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end
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end
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