Pleroma/lib/pleroma/web/federator/federator.ex

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Elixir
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defmodule Pleroma.Web.Federator do
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use GenServer
alias Pleroma.User
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alias Pleroma.Web.{WebFinger, Websub}
require Logger
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@websub Application.get_env(:pleroma, :websub)
@ostatus Application.get_env(:pleroma, :ostatus)
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@max_jobs 10
def start_link do
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spawn(fn ->
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Process.sleep(1000 * 60 * 1) # 1 minute
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enqueue(:refresh_subscriptions, nil)
end)
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GenServer.start_link(__MODULE__, {:sets.new(), :queue.new()}, name: __MODULE__)
end
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def handle(:refresh_subscriptions, _) do
Logger.debug("Federator running refresh subscriptions")
Websub.refresh_subscriptions()
spawn(fn ->
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Process.sleep(1000 * 60 * 60 * 6) # 6 hours
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enqueue(:refresh_subscriptions, nil)
end)
end
def handle(:publish, activity) do
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Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end)
with actor when not is_nil(actor) <- User.get_cached_by_ap_id(activity.data["actor"]) do
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Logger.debug(fn -> "Sending #{activity.data["id"]} out via websub" end)
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Websub.publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity)
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{:ok, actor} = WebFinger.ensure_keys_present(actor)
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Logger.debug(fn -> "Sending #{activity.data["id"]} out via salmon" end)
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Pleroma.Web.Salmon.publish(actor, activity)
end
end
def handle(:verify_websub, websub) do
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Logger.debug(fn -> "Running websub verification for #{websub.id} (#{websub.topic}, #{websub.callback})" end)
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@websub.verify(websub)
end
def handle(:incoming_doc, doc) do
Logger.debug("Got document, trying to parse")
@ostatus.handle_incoming(doc)
end
def handle(type, payload) do
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Logger.debug(fn -> "Unknown task: #{type}" end)
{:error, "Don't know what do do with this"}
end
def enqueue(type, payload) do
if Mix.env == :test do
handle(type, payload)
else
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GenServer.cast(__MODULE__, {:enqueue, type, payload})
end
end
def maybe_start_job(running_jobs, queue) do
if (:sets.size(running_jobs) < @max_jobs) && !:queue.is_empty(queue) do
{{:value, {type, payload}}, queue} = :queue.out(queue)
{:ok, pid} = Task.start(fn -> handle(type, payload) end)
mref = Process.monitor(pid)
{:sets.add_element(mref, running_jobs), queue}
else
{running_jobs, queue}
end
end
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def handle_cast({:enqueue, type, payload}, {running_jobs, queue}) do
queue = :queue.in({type, payload}, queue)
{running_jobs, queue} = maybe_start_job(running_jobs, queue)
{:noreply, {running_jobs, queue}}
end
def handle_info({:DOWN, ref, :process, _pid, _reason}, {running_jobs, queue}) do
running_jobs = :sets.del_element(ref, running_jobs)
{running_jobs, queue} = maybe_start_job(running_jobs, queue)
{:noreply, {running_jobs, queue}}
end
def handle_cast(m, state) do
IO.inspect("Unknown: #{inspect(m)}, #{inspect(state)}")
{:noreply, state}
end
end