move ident request to orchestration_server.py;

import sys modules for proper pickling;

components/i_feed/i_feed.py

@@ -1,23 +1,33 @@
+import sys
 import time
-import requests
 
-from devices.traffic_light import TrafficLight, SWITCHING_TIME
+import requests
+from dse_shared_libs import daf, traffic_light_state, traffic_light_color, target_velocity
+
+from devices.traffic_light import TrafficLight
 from devices.vehicle import Vehicle
 
+sys.modules['daf'] = daf
+sys.modules['traffic_light_state'] = traffic_light_state
+sys.modules['traffic_light_color'] = traffic_light_color
+sys.modules['target_velocity'] = target_velocity
+
 """
 USED AS ENTRYPOINT FOR DOCKERFILE
 Start all vehicles / traffic lights here
 """
 
 if __name__ == '__main__':
-
     ENTITY_IDENT_URL = 'http://entityident:5002/api/v1/resources/'
+    try:
+        response = requests.get(ENTITY_IDENT_URL + 'cars')
+        cars = response.json()
 
-    response = requests.get(ENTITY_IDENT_URL + 'cars')
-    cars = response.json()
-
-    response = requests.get(ENTITY_IDENT_URL + 'traffic_lights')
-    traffic_lights = response.json()
+        response = requests.get(ENTITY_IDENT_URL + 'traffic_lights')
+        traffic_lights = response.json()
+    except requests.exceptions.ConnectionError as e:
+        print("Is the entity_ident_server running and reachable?")
+        raise e
 
     print('Traffic lights', traffic_lights['cursor'])
     for traffic_light in traffic_lights['cursor']: