Graham McIntire
fe5228b306
Worker now uses unique: [period: 3600, states: [:available, :scheduled, :executing, :retryable]] so Oban atomically prevents duplicates. FreshnessMonitor simplified — no longer does manual oban_jobs query.
61 lines
1.6 KiB
Elixir
61 lines
1.6 KiB
Elixir
defmodule Microwaveprop.Propagation.FreshnessMonitor do
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@moduledoc """
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Monitors propagation score freshness and enqueues grid worker jobs
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when data is stale. Checks every 5 minutes. Covers missed cron ticks,
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slow deploys, worker crashes, and any other gap in hourly scoring.
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"""
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use GenServer
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alias Microwaveprop.Propagation
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alias Microwaveprop.Workers.PropagationGridWorker
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require Logger
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@check_interval to_timeout(minute: 5)
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@stale_threshold_minutes 120
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def start_link(_opts) do
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if Application.get_env(:microwaveprop, :start_freshness_monitor, true) do
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GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
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else
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:ignore
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end
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end
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@impl true
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def init(:ok) do
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send(self(), :check)
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{:ok, %{}}
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end
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@impl true
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def handle_info(:check, state) do
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check_freshness()
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Process.send_after(self(), :check, @check_interval)
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{:noreply, state}
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end
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defp check_freshness do
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case Propagation.latest_valid_time() do
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nil ->
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Logger.info("FreshnessMonitor: no scores found, enqueuing grid worker")
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enqueue_if_not_queued()
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latest ->
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age = DateTime.diff(DateTime.utc_now(), latest, :minute)
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if age > @stale_threshold_minutes do
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Logger.info("FreshnessMonitor: scores are #{age}m old, enqueuing grid worker")
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enqueue_if_not_queued()
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end
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end
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end
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defp enqueue_if_not_queued do
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# Oban unique constraint on PropagationGridWorker prevents duplicates —
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# if a job is already available/scheduled/executing/retryable within the
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# last hour, insert is a no-op.
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Oban.insert(PropagationGridWorker.new(%{}))
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end
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end
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