Move MQTT and HSL startup scripts around

coffee_scale/__init__.py

@@ -1,4 +0,0 @@
-from . import mqtt
-import logging
-
-mqtt.client.loop_start()

coffee_scale/apps.py

@@ -1,5 +1,23 @@
 from django.apps import AppConfig
 
+import logging
+import sys
+
+from coffee_scale import mqtt
+
 
 class CoffeeScaleConfig(AppConfig):
     name = 'coffee_scale'
+
+    def ready(self):
+        if ('makemigrations' in sys.argv or 'migrate' in sys.argv):
+            return
+
+        try:
+            logging.info('Connecting to MQTT (coffee scale) at {}...'.format(mqtt.HOST))
+            logging.info('If there is no confirmation, the MQTT connection has probably failed.')
+            mqtt.client.connect_async(mqtt.HOST, mqtt.PORT, 60)
+            mqtt.client.loop_start()
+        except Exception as ex:
+            logging.error(ex)
+            logging.error('Failed to connect to MQTT at {}'.format(mqtt.HOST))

coffee_scale/mqtt.py

@@ -56,12 +56,3 @@ client = mqtt.Client()
 client.on_connect = on_connect
 client.on_message = on_message
 client.on_disconnect = on_disconnect
-
-
-try:
-    logging.info('Connecting to MQTT at {}...'.format(HOST))
-    logging.info('If there is no confirmation, the MQTT connection has probably failed.')
-    client.connect_async(HOST, PORT, 60)
-except Exception as ex:
-    logging.error(ex)
-    logging.error('Failed to connect to MQTT at {}'.format(HOST))

infoscreen/hsl_fetcher.py

@@ -16,8 +16,8 @@ class HSLFetcher:
 
     last_fetched = datetime.fromtimestamp(86400)  # epoch
     INTERVAL = 1  # minutes
-    logging.info(
-        "Set up scheduled HSL API fetch every {} minutes".format(INTERVAL))
+    # logging.info(
+    #    "Set up scheduled HSL API fetch every {} minutes".format(INTERVAL))
 
     def fetch_if_needed(self):
         """Check if new fetch from HSL API is needed."""

sikweb/base.py

@@ -78,7 +78,7 @@ INSTALLED_APPS = [
     'webapp',
     'members',
     'infoscreen',
-    'coffee_scale',
+    'coffee_scale.apps.CoffeeScaleConfig',
     'rest_framework',
     'django_nose',
     'bootstrap3',