Graham McIntire
33171ab32e
- Database triggers on contacts and oban_jobs fire pg_notify on status/state changes - RepoListener GenServer subscribes via Postgrex.Notifications and broadcasts to PubSub - Backfill dashboard subscribes to PubSub instead of 2-second polling - Eliminates periodic SELECT queries, updates arrive instantly
62 lines
1.9 KiB
Elixir
62 lines
1.9 KiB
Elixir
defmodule Microwaveprop.Repo.Migrations.AddEnrichmentNotifyTriggers do
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use Ecto.Migration
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def up do
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# Notify on contact enrichment status changes
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execute """
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CREATE OR REPLACE FUNCTION notify_contact_status_change() RETURNS trigger AS $$
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BEGIN
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IF OLD.hrrr_status IS DISTINCT FROM NEW.hrrr_status
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OR OLD.weather_status IS DISTINCT FROM NEW.weather_status
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OR OLD.terrain_status IS DISTINCT FROM NEW.terrain_status
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OR OLD.iemre_status IS DISTINCT FROM NEW.iemre_status THEN
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PERFORM pg_notify('contact_status_changed', json_build_object(
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'id', NEW.id,
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'hrrr_status', NEW.hrrr_status,
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'weather_status', NEW.weather_status,
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'terrain_status', NEW.terrain_status,
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'iemre_status', NEW.iemre_status
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)::text);
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END IF;
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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"""
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execute """
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CREATE TRIGGER contact_status_notify
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AFTER UPDATE ON contacts
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FOR EACH ROW EXECUTE FUNCTION notify_contact_status_change();
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"""
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# Notify on Oban job state changes
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execute """
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CREATE OR REPLACE FUNCTION notify_oban_job_change() RETURNS trigger AS $$
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BEGIN
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IF OLD.state IS DISTINCT FROM NEW.state THEN
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PERFORM pg_notify('oban_job_changed', json_build_object(
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'id', NEW.id,
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'worker', NEW.worker,
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'queue', NEW.queue,
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'state', NEW.state
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)::text);
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END IF;
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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"""
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execute """
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CREATE TRIGGER oban_job_notify
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AFTER UPDATE ON oban_jobs
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FOR EACH ROW EXECUTE FUNCTION notify_oban_job_change();
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"""
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end
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def down do
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execute "DROP TRIGGER IF EXISTS contact_status_notify ON contacts"
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execute "DROP FUNCTION IF EXISTS notify_contact_status_change()"
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execute "DROP TRIGGER IF EXISTS oban_job_notify ON oban_jobs"
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execute "DROP FUNCTION IF EXISTS notify_oban_job_change()"
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end
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end
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