Refactor utils.py as a helper class so we have some control about when the lookup services actually start

spothole.py

@@ -8,8 +8,8 @@ from diskcache import Cache
 
 from core.cleanup import CleanupTimer
 from core.config import config, WEB_SERVER_PORT
+from core.lookup_helper import lookup_helper
 from core.status_reporter import StatusReporter
-from core.utils import QRZ_CALLSIGN_DATA_CACHE
 from server.webserver import WebServer
 
 # Globals
@@ -31,8 +31,9 @@ def shutdown(sig, frame):
         if p.enabled:
             p.stop()
     cleanup_timer.stop()
-    QRZ_CALLSIGN_DATA_CACHE.close()
+    lookup_helper.stop()
     spots.close()
+    alerts.close()
 
 
 # Utility method to get a spot provider based on the class specified in its config entry.
@@ -65,6 +66,9 @@ if __name__ == '__main__':
     # Shut down gracefully on SIGINT
     signal.signal(signal.SIGINT, shutdown)
 
+    # Set up lookup helper
+    lookup_helper.start()
+
     # Fetch, set up and start spot providers
     for entry in config["spot-providers"]:
         spot_providers.append(get_spot_provider_from_config(entry))