Add connect_timout to DBManager connection and accelerate program start

on connection timeout

lib/DB/DbManager.py

@@ -1,7 +1,6 @@
-# This Python file uses the following encoding: utf-8
 import mariadb
 
-class DbManager(object):
+class DbManager():
     __connection = None
     __con_param = None
     __dbmanager = None
@@ -14,7 +13,6 @@ class DbManager(object):
 
         return cls.__dbmanager
 
-
     def getConnection(cls):
             #print(f"DB Manager: {cls.__dbmanager}")
             #print(f"DB Connection: {cls.__connection}")
@@ -26,7 +24,10 @@ class DbManager(object):
                 cls.__connection = mariadb.connect(**cls.__con_param)
                 print(f"DbManager Connection (INTERFACE ERROR): {e}..reconnecting...")
             except mariadb.Error as e:
-                print(f"File: {__file__}\n      Database connection error: {e}")
+                if '(110)' in str(e):
+                    print(f"File: {__file__}\n      Database connection timed out (Check connection parameters or server): {e}")
+                else:
+                    print(f"File: {__file__}\n      Database connection error: {e}")
                 cls.__connection = None
 
             return cls.__connection
@@ -34,7 +35,7 @@ class DbManager(object):
     def __initializeConfig(cls, dbconf):
         cls.__con_param = { 'user': dbconf['DB_USER'], 'password': dbconf['DB_PASS'],
                       'port': int (dbconf['DB_PORT']), 'host': dbconf['DB_HOST'],
-                      'database': dbconf['DB_NAME']
+                      'database': dbconf['DB_NAME'], 'connect_timeout': 5
                     }