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federator.ex
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federator.ex
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defmodule Pleroma.Web.Federator do
use GenServer
alias Pleroma.User
alias Pleroma.Web.WebFinger
require Logger
@websub Application.get_env(:pleroma, :websub)
@max_jobs 10
def start_link do
GenServer.start_link(__MODULE__, {:sets.new(), :queue.new()}, name: __MODULE__)
end
def handle(:publish, activity) do
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
Logger.debug(fn -> "Sending #{activity.data["id"]} out via websub" end)
Pleroma.Web.Websub.publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity)
{:ok, actor} = WebFinger.ensure_keys_present(actor)
Logger.debug(fn -> "Sending #{activity.data["id"]} out via salmon" end)
Pleroma.Web.Salmon.publish(actor, activity)
end
end
def handle(:verify_websub, websub) do
Logger.debug(fn -> "Running websub verification for #{websub.id} (#{websub.topic}, #{websub.callback})" end)
@websub.verify(websub)
end
def handle(type, payload) do
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
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
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

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