79 lines
1.9 KiB
Elixir
79 lines
1.9 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Federator.RetryQueue do
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use GenServer
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require Logger
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# initial timeout, 5 min
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@initial_timeout 30_000
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@max_retries 5
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def init(args) do
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{:ok, args}
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end
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def start_link() do
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enabled = Pleroma.Config.get([:retry_queue, :enabled], false)
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if enabled do
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Logger.info("Starting retry queue")
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GenServer.start_link(__MODULE__, %{delivered: 0, dropped: 0}, name: __MODULE__)
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else
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Logger.info("Retry queue disabled")
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:ignore
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end
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end
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def enqueue(data, transport, retries \\ 0) do
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GenServer.cast(__MODULE__, {:maybe_enqueue, data, transport, retries + 1})
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end
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def get_retry_params(retries) do
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if retries > @max_retries do
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{:drop, "Max retries reached"}
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else
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{:retry, growth_function(retries)}
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end
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end
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def handle_cast({:maybe_enqueue, data, transport, retries}, %{dropped: drop_count} = state) do
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case get_retry_params(retries) do
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{:retry, timeout} ->
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Process.send_after(
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__MODULE__,
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{:send, data, transport, retries},
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timeout
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)
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{:noreply, state}
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{:drop, message} ->
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Logger.debug(message)
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{:noreply, %{state | dropped: drop_count + 1}}
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end
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end
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def handle_info({:send, data, transport, retries}, %{delivered: delivery_count} = state) do
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case transport.publish_one(data) do
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{:ok, _} ->
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{:noreply, %{state | delivered: delivery_count + 1}}
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{:error, _reason} ->
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enqueue(data, transport, retries)
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{:noreply, state}
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end
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end
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def handle_info(unknown, state) do
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Logger.debug("RetryQueue: don't know what to do with #{inspect(unknown)}, ignoring")
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{:noreply, state}
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end
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defp growth_function(retries) do
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round(@initial_timeout * :math.pow(retries, 3))
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end
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end
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