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}")
@@ -26,6 +24,9 @@ class DbManager(object):
                 cls.__connection = mariadb.connect(**cls.__con_param)
                 print(f"DbManager Connection (INTERFACE ERROR): {e}..reconnecting...")
             except mariadb.Error as 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
 
@@ -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
                     }
 
 

main.py

@@ -1,4 +1,4 @@
-# This Python file uses the following encoding: utf-8
+# # !/home/linuxero/proj/tero/pyqcrm/.qtcreator/venv-3.13.0/bin/python3
 import sys
 import logging
 from PySide6.QtGui import QGuiApplication
@@ -37,18 +37,19 @@ user = None
 
 def initializeProgram():
     #print(f"In {__file__} file, initializeProgram()")
-    global address_model, bad_config, business_model, user, business_type, contact_model
+    global address_model, bad_config, business_model, user, business_type, contact_model, db_con
     if not bad_config:
         dbconf = config.getConfig()['database']
         DbManager(dbconf)
-    bad_config = False
+        if DbManager().getConnection():
+            db_con = True
             user = UserManager()
             business_model = BusinessModel()
             address_model = AddressModel()
             business_type = BTypeModel()
             contact_model = ContactModel()
-
             publishContext()
+    bad_config = False
 
 def publishContext():
     # print(f"In {__file__} file, publishContext()")
@@ -79,8 +80,6 @@ if __name__ == "__main__":
         config.configurationReady.connect(initializeProgram)
     else:
         initializeProgram()
-        if DbManager().getConnection():
-            db_con = True
 
 
     engine.rootContext().setContextProperty("bad_config", bad_config) #     print(f"Fehler: {i}")

requirements.txt

@@ -0,0 +1,9 @@
+PySide6
+platformdirs
+pycryptodome
+psutil
+toml
+mariadb
+
+
+