class API(tornado.web.Application):
    def __init__(self):
        settings = dict(
            autoreload=True,
            compiled_template_cache=False,
            static_hash_cache=False,
            serve_traceback=True,
            cookie_secret="secret",
            xsrf_cookies=True,
            static_path=os.path.join(os.path.dirname(__file__), "media"),
            template_loader=tornado.template.Loader('./templates')
        )

        mongohost = os.environ.get('MONGOHOST', 'localhost')
        mongoport = os.environ.get('MONGOPORT', 27017)
        mongouser = os.environ.get('MONGOUSER')
        mongopass = os.environ.get('MONGOPASS')
        mongodb = os.environ.get('MONGODB')
        mongouri = f'mongodb://{mongouser}:{mongopass}@{mongohost}:{mongoport}/{mongodb}'

        self.client = motor.motor_tornado.MotorClient(mongouri)
        logging.info('connected to mongodb')
        self.db = self.client.get_default_database()
        logging.info('got mongodb database')
        tornado.web.Application.__init__(self, url_patterns, **settings)


def main():
    port = 8888
    FORMAT = ('%(asctime)s %(levelname) -10s %(name) -30s %(funcName) -35s %(lineno) -5d: %(message)s')
    logging.basicConfig(level=logging.DEBUG, format=FORMAT)

    tornado.ioloop.IOLoop.configure(TornadoUvloop)
    app = API()
    app.listen(port)
    signal.signal(signal.SIGINT, sig_exit)
    logging.info('Tornado server started on port %s' % port)
    tornado.ioloop.IOLoop.instance().start()


if __name__ == "__main__":
    main()

cursor = self.application.db['events'].find(
          find,
          projection
      ).limit(perpage).skip(page*perpage)
      buffsize = 0
      try:
          while (yield cursor.fetch_next):
              message = cursor.next_object()
              self.write(json.dumps(message, default=json_util.default))
              buffsize += 1
              if buffsize >= 10:
                  buffsize = 0
                  yield self.flush()
          yield self.flush()
      except Exception:
          logging.error('Could not connect to mongodb', exc_info=True)

2017-12-12 12:35:42,967 INFO       root                           get                                  266 : now querying database
2017-12-12 12:35:42,967 INFO       root                           get                                  340 : logging out of the database
2017-12-12 12:35:42,968 INFO       root                           get                                  342 : now logging into the database
2017-12-12 12:36:10,786 ERROR      tornado.application            log_exception                        1590: Uncaught exception GET /event/list/web?starttime=2017-01-01&endtime=2017-02-03T14:00:00&minlatitude=10&maxlatitude=20&minlongitude=10&maxlongitude=20&minmagnitude=2&maxmagnitude=5&mindepth=10&maxdepth=100 (::1)
HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', uri='/event/list/web?starttime=2017-01-01&endtime=2017-02-03T14:00:00&minlatitude=10&maxlatitude=20&minlongitude=10&maxlongitude=20&minmagnitude=2&maxmagnitude=5&mindepth=10&maxdepth=100', version='HTTP/1.1', remote_ip='::1', headers={'Host': 'localhost:8888', 'Cookie': 'wp-settings-1=libraryContent%3Dbrowse%26editor%3Dtinymce%26hidetb%3D1; wp-settings-time-1=1505996486; showhide_headings=%40idInstructionsoftheStructuredMasterDocuments2%3Ao%40idInstructionsoftheStructuredMasterDocuments4%3Ao%40idInstructionsoftheStructuredMasterDocuments3%3Ao%40idInstructionsoftheStructuredMasterDocuments5%3Ao%40idInstructionsoftheStructuredMasterDocuments6%3Ao; menu=%40mod-menuleft1%3Ao; PHPSESSIDCV=LQnf4TuA7JRnAd8hnGjAOQ%3D%3D; javascript_enabled=y; local_tz=EEST; local_tzoffset=3', 'Connection': 'keep-alive', 'Upgrade-Insecure-Requests': '1', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/604.3.5 (KHTML, like Gecko) Version/11.0.1 Safari/604.3.5', 'Accept-Language': 'en-us', 'Dnt': '1', 'Accept-Encoding': 'gzip, deflate'})
Traceback (most recent call last):
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/web.py", line 1511, in _execute
    result = yield result
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/gen.py", line 1055, in run
    value = future.result()
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/concurrent.py", line 238, in result
    raise_exc_info(self._exc_info)
  File "<string>", line 4, in raise_exc_info
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/gen.py", line 1063, in run
    yielded = self.gen.throw(*exc_info)
  File "/Users/liviu/Documents/Work/api_v2/src/api_tmp/handlers/event_list.py", line 343, in get
    yield self.application.client.infp.authenticate('mango', '1_4m_th3_s3n4t3')
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/gen.py", line 1055, in run
    value = future.result()
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/concurrent.py", line 238, in result
    raise_exc_info(self._exc_info)
  File "<string>", line 4, in raise_exc_info
  File "/usr/local/Cellar/python3/3.6.3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/concurrent/futures/thread.py", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/database.py", line 1075, in authenticate
    connect=True)
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/mongo_client.py", line 542, in _cache_credentials
    writable_preferred_server_selector)
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/topology.py", line 214, in select_server
    address))
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/topology.py", line 189, in select_servers
    self._error_message(selector))
pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno 61] Connection refused
2017-12-12 12:36:10,790 ERROR      tornado.access                 log_request                          2063: 500 GET /event/list/web?starttime=2017-01-01&endtime=2017-02-03T14:00:00&minlatitude=10&maxlatitude=20&minlongitude=10&maxlongitude=20&minmagnitude=2&maxmagnitude=5&mindepth=10&maxdepth=100 (::1) 30250.53ms
2017-12-12 12:36:13,209 ERROR      tornado.application            log_exception                        1590: Uncaught exception GET /event/list/web?starttime=2017-01-01&endtime=2017-02-03T14:00:00&minlatitude=10&maxlatitude=20&minlongitude=10&maxlongitude=20&minmagnitude=2&maxmagnitude=5&mindepth=10&maxdepth=100 (::1)
HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', uri='/event/list/web?starttime=2017-01-01&endtime=2017-02-03T14:00:00&minlatitude=10&maxlatitude=20&minlongitude=10&maxlongitude=20&minmagnitude=2&maxmagnitude=5&mindepth=10&maxdepth=100', version='HTTP/1.1', remote_ip='::1', headers={'Host': 'localhost:8888', 'Cookie': 'wp-settings-1=libraryContent%3Dbrowse%26editor%3Dtinymce%26hidetb%3D1; wp-settings-time-1=1505996486; showhide_headings=%40idInstructionsoftheStructuredMasterDocuments2%3Ao%40idInstructionsoftheStructuredMasterDocuments4%3Ao%40idInstructionsoftheStructuredMasterDocuments3%3Ao%40idInstructionsoftheStructuredMasterDocuments5%3Ao%40idInstructionsoftheStructuredMasterDocuments6%3Ao; menu=%40mod-menuleft1%3Ao; PHPSESSIDCV=LQnf4TuA7JRnAd8hnGjAOQ%3D%3D; javascript_enabled=y; local_tz=EEST; local_tzoffset=3', 'Connection': 'keep-alive', 'Upgrade-Insecure-Requests': '1', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/604.3.5 (KHTML, like Gecko) Version/11.0.1 Safari/604.3.5', 'Accept-Language': 'en-us', 'Dnt': '1', 'Accept-Encoding': 'gzip, deflate'})
Traceback (most recent call last):
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/web.py", line 1511, in _execute
    result = yield result
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/gen.py", line 1055, in run
    value = future.result()
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/concurrent.py", line 238, in result
    raise_exc_info(self._exc_info)
  File "<string>", line 4, in raise_exc_info
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/gen.py", line 1063, in run
    yielded = self.gen.throw(*exc_info)
  File "/Users/liviu/Documents/Work/api_v2/src/api_tmp/handlers/event_list.py", line 343, in get
    yield self.application.client.infp.authenticate('mango', '1_4m_th3_s3n4t3')
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/gen.py", line 1055, in run
    value = future.result()
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/tornado/concurrent.py", line 238, in result
    raise_exc_info(self._exc_info)
  File "<string>", line 4, in raise_exc_info
  File "/usr/local/Cellar/python3/3.6.3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/concurrent/futures/thread.py", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/database.py", line 1075, in authenticate
    connect=True)
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/mongo_client.py", line 542, in _cache_credentials
    writable_preferred_server_selector)
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/topology.py", line 214, in select_server
    address))
  File "/Users/liviu/.venv/api/lib/python3.6/site-packages/pymongo/topology.py", line 189, in select_servers
    self._error_message(selector))
pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno 61] Connection refused
2017-12-12 12:36:13,211 ERROR      tornado.access                 log_request                          2063: 500 GET /event/list/web?starttime=2017-01-01&endtime=2017-02-03T14:00:00&minlatitude=10&maxlatitude=20&minlongitude=10&maxlongitude=20&minmagnitude=2&maxmagnitude=5&mindepth=10&maxdepth=100 (::1) 30244.34ms