Add logger and better exception handling

gateway.py

@@ -1,27 +1,51 @@
+import logging
+import sys
+if sys.version_info < (3,4):
+  print("To use this script you need python 3.4 or newer! got %s" % sys.version_info)
+  sys.exit(1)
+
+from logger import _LOGGER
+import argparse
 from queue import Queue
-
-from apscheduler.schedulers.background import BackgroundScheduler
-
 from config import settings
 from mqtt import MqttClient
 from workers_manager import WorkersManager
+from apscheduler.schedulers.background import BackgroundScheduler
+
+parser = argparse.ArgumentParser()
+parser.add_argument('-d', '--debug', action='store_true', default=False)
+parsed = parser.parse_args()
+
+if parsed.debug:
+  _LOGGER.setLevel(logging.DEBUG)
+else:
+  _LOGGER.setLevel(logging.INFO)
 
 queue = Queue()
 scheduler = BackgroundScheduler()
 mqtt = MqttClient(settings['mqtt'])
 manager = WorkersManager(settings['workers'])
 
+_LOGGER.info('Starting')
+
 for worker_name, interval in manager.interval_enabled_workers.items():
+  _LOGGER.debug("Added: %s with %d seconds interval" % (worker_name, interval))
   queue.put([worker_name])
   scheduler.add_job(lambda x: queue.put([x]), 'interval', seconds=interval, args=[worker_name])
 
 scheduler.start()
 
-while True:
-  for worker_name in queue.get(block=True):
-    try:
-      mqtt.publish(manager.update(worker_name))
-    except (KeyboardInterrupt, SystemExit):
-      raise
-    except:
-      print('Some error')
+running = True
+
+try:
+  while running:
+    for worker_name in queue.get(block=True):
+      try:
+        mqtt.publish(manager.update(worker_name))
+      except (KeyboardInterrupt, SystemExit):
+        raise
+      except:
+        _LOGGER.info('Some error')
+except KeyboardInterrupt:
+  running = False
+  _LOGGER.info('Exiting allowing jobs to finish. If you need force exit use kill')