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authordcc <dcc@logografos.com>2023-09-02 00:52:52 -0700
committerdcc <dcc@logografos.com>2023-09-02 00:52:52 -0700
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.JobQueueMonitor do
+ use GenServer
+
+ @initial_state %{workers: %{}, queues: %{}, processed_jobs: 0}
+ @queue %{processed_jobs: 0, success: 0, failure: 0}
+ @operation %{processed_jobs: 0, success: 0, failure: 0}
+
+ def start_link(_) do
+ GenServer.start_link(__MODULE__, @initial_state, name: __MODULE__)
+ end
+
+ @impl true
+ def init(state) do
+ :telemetry.attach("oban-monitor-failure", [:oban, :job, :exception], &handle_event/4, nil)
+ :telemetry.attach("oban-monitor-success", [:oban, :job, :stop], &handle_event/4, nil)
+
+ {:ok, state}
+ end
+
+ def stats do
+ GenServer.call(__MODULE__, :stats)
+ end
+
+ def handle_event([:oban, :job, event], %{duration: duration}, meta, _) do
+ GenServer.cast(
+ __MODULE__,
+ {:process_event, mapping_status(event), duration, meta}
+ )
+ end
+
+ @impl true
+ def handle_call(:stats, _from, state) do
+ {:reply, state, state}
+ end
+
+ @impl true
+ def handle_cast({:process_event, status, duration, meta}, state) do
+ state =
+ state
+ |> Map.update!(:workers, fn workers ->
+ workers
+ |> Map.put_new(meta.worker, %{})
+ |> Map.update!(meta.worker, &update_worker(&1, status, meta, duration))
+ end)
+ |> Map.update!(:queues, fn workers ->
+ workers
+ |> Map.put_new(meta.queue, @queue)
+ |> Map.update!(meta.queue, &update_queue(&1, status, meta, duration))
+ end)
+ |> Map.update!(:processed_jobs, &(&1 + 1))
+
+ {:noreply, state}
+ end
+
+ defp update_worker(worker, status, meta, duration) do
+ worker
+ |> Map.put_new(meta.args["op"], @operation)
+ |> Map.update!(meta.args["op"], &update_op(&1, status, meta, duration))
+ end
+
+ defp update_op(op, :enqueue, _meta, _duration) do
+ op
+ |> Map.update!(:enqueued, &(&1 + 1))
+ end
+
+ defp update_op(op, status, _meta, _duration) do
+ op
+ |> Map.update!(:processed_jobs, &(&1 + 1))
+ |> Map.update!(status, &(&1 + 1))
+ end
+
+ defp update_queue(queue, status, _meta, _duration) do
+ queue
+ |> Map.update!(:processed_jobs, &(&1 + 1))
+ |> Map.update!(status, &(&1 + 1))
+ end
+
+ defp mapping_status(:stop), do: :success
+ defp mapping_status(:exception), do: :failure
+end