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:
+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:
-      print('Some error')
+        _LOGGER.info('Some error')
+except KeyboardInterrupt:
+  running = False
+  _LOGGER.info('Exiting allowing jobs to finish. If you need force exit use kill')

logger.py

@@ -0,0 +1,6 @@
+import logging
+
+import sys
+
+_LOGGER = logging.getLogger('bt-mqtt-gw')
+_LOGGER.addHandler(logging.StreamHandler(sys.stdout))

mqtt.py

@@ -1,11 +1,12 @@
+from logger import _LOGGER
 import paho.mqtt.publish as publish
 
-
 class MqttClient:
   def __init__(self, config):
     self._config = config
 
   def publish(self, messages):
+    _LOGGER.debug(messages)
     publish.multiple(list(map(lambda m: m.as_dict, messages)),
                      hostname=self.hostname,
                      auth={'username': self.username, 'password': self.password})
@@ -46,3 +47,9 @@ class MqttMessage:
       'topic': self.topic,
       'payload': self.payload
     }
+
+  def __repr__(self):
+    return  self.as_dict.__str__()
+
+  def __str__(self):
+    return self.__repr__()