Graham McIntire
4468fb3b61
20 attempts with exponential backoff capped at 6 hours ensures data is eventually fetched even during extended rate limiting or API outages (~3 days of retrying before giving up).
110 lines
3.4 KiB
Elixir
110 lines
3.4 KiB
Elixir
defmodule Microwaveprop.Workers.WeatherFetchWorker do
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@moduledoc false
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use Oban.Worker, queue: :weather, max_attempts: 20
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alias Microwaveprop.Repo
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alias Microwaveprop.Weather
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alias Microwaveprop.Weather.IemClient
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alias Microwaveprop.Weather.SoundingParams
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alias Microwaveprop.Weather.Station
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@impl Oban.Worker
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def backoff(%Oban.Job{attempt: attempt}) do
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min(120 * Integer.pow(2, attempt - 1), _six_hours = 21_600)
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end
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@impl Oban.Worker
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def perform(%Oban.Job{args: %{"fetch_type" => "asos"} = args}) do
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%{
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"station_id" => station_id,
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"station_code" => station_code,
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"start_dt" => start_dt_str,
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"end_dt" => end_dt_str
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} = args
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{:ok, start_dt, _} = DateTime.from_iso8601(start_dt_str)
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{:ok, end_dt, _} = DateTime.from_iso8601(end_dt_str)
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case Repo.get(Station, station_id) do
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nil ->
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:ok
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station ->
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if Weather.has_surface_observations?(station.id, start_dt, end_dt) do
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:ok
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else
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case IemClient.fetch_asos(station_code, start_dt, end_dt) do
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{:ok, rows} ->
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Enum.each(rows, fn row ->
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if row.observed_at, do: Weather.upsert_surface_observation(station, row)
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end)
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:ok
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{:error, reason} ->
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{:error, reason}
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end
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end
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end
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end
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def perform(%Oban.Job{args: %{"fetch_type" => "raob"} = args}) do
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%{
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"station_id" => station_id,
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"station_code" => station_code,
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"sounding_time" => sounding_time_str
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} = args
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{:ok, sounding_time, _} = DateTime.from_iso8601(sounding_time_str)
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case Repo.get(Station, station_id) do
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nil ->
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:ok
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station ->
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if Weather.has_sounding?(station.id, sounding_time) do
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:ok
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else
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case IemClient.fetch_raob(station_code, sounding_time) do
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{:ok, [parsed | _]} ->
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params = SoundingParams.derive(parsed.profile)
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sounding_attrs =
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if params do
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%{
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observed_at: parsed.observed_at,
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profile: parsed.profile,
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level_count: params.level_count,
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surface_pressure_mb: params.surface_pressure_mb,
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surface_temp_c: params.surface_temp_c,
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surface_dewpoint_c: params.surface_dewpoint_c,
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surface_refractivity: params.surface_refractivity,
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min_refractivity_gradient: params.min_refractivity_gradient,
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boundary_layer_depth_m: params.boundary_layer_depth_m,
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precipitable_water_mm: params.precipitable_water_mm,
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k_index: params.k_index,
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lifted_index: params.lifted_index,
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ducting_detected: params.ducting_detected,
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duct_characteristics: params.duct_characteristics
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}
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else
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%{
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observed_at: parsed.observed_at,
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profile: parsed.profile,
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level_count: length(parsed.profile)
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}
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end
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Weather.upsert_sounding(station, sounding_attrs)
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:ok
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{:ok, []} ->
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:ok
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{:error, reason} ->
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{:error, reason}
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end
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end
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end
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end
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end
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