Fixed database connection handling by reconnecting

src/cpl_core/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -23,4 +23,4 @@ from collections import namedtuple
 # imports:
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/application/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.application'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -29,4 +29,4 @@ from .startup_abc import StartupABC
 from .startup_extension_abc import StartupExtensionABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/configuration/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.configuration'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -35,4 +35,4 @@ from .validator_abc import ValidatorABC
 from .variable_argument import VariableArgument
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/console/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.console'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -28,4 +28,4 @@ from .foreground_color_enum import ForegroundColorEnum
 from .spinner_thread import SpinnerThread
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/cpl-core.json

@@ -4,7 +4,7 @@
     "Version": {
       "Major": "2022",
       "Minor": "7",
-      "Micro": "0.post4"
+      "Micro": "0.post5"
     },
     "Author": "Sven Heidemann",
     "AuthorEmail": "sven.heidemann@sh-edraft.de",

src/cpl_core/database/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.database'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -26,4 +26,4 @@ from .database_settings import DatabaseSettings
 from .table_abc import TableABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/database/connection/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.database.connection'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -25,4 +25,4 @@ from .database_connection import DatabaseConnection
 from .database_connection_abc import DatabaseConnectionABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/database/context/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.database.context'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -25,4 +25,4 @@ from .database_context import DatabaseContext
 from .database_context_abc import DatabaseContextABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/database/context/database_context.py

@@ -1,6 +1,8 @@
 
 from typing import Optional
 
+import mysql
+
 from cpl_core.database.connection.database_connection import DatabaseConnection
 from cpl_core.database.connection.database_connection_abc import \
     DatabaseConnectionABC
@@ -23,12 +25,25 @@ class DatabaseContext(DatabaseContextABC):
 
         self._db: DatabaseConnectionABC = DatabaseConnection()
         self._tables: list[TableABC] = TableABC.__subclasses__()
+        self._settings: Optional[DatabaseSettings] = None
 
     @property
     def cursor(self) -> MySQLCursorBuffered:
+        self._ping_and_reconnect()
         return self._db.cursor
-    
+
+    def _ping_and_reconnect(self):
+        try:
+            self._db.server.ping(reconnect=True, attempts=3, delay=5)
+        except mysql.connector.Error as err:
+            # reconnect your cursor as you did in __init__ or wherever
+            if self._settings is None:
+                raise Exception('Call DatabaseContext.connect first')
+            self.connect(self._settings)
+
     def connect(self, database_settings: DatabaseSettings):
+        if self._settings is None:
+            self._settings = database_settings
         self._db.connect(database_settings)
         for table in self._tables:
             self._db.cursor.execute(table.get_create_string())
@@ -36,8 +51,10 @@ class DatabaseContext(DatabaseContextABC):
         self.save_changes()
 
     def save_changes(self):
+        self._ping_and_reconnect()
         self._db.server.commit()
         
     def select(self, statement: str) -> list[tuple]:
+        self._ping_and_reconnect()
         self._db.cursor.execute(statement)
         return self._db.cursor.fetchall()

src/cpl_core/database/context/database_context_abc.py

@@ -12,8 +12,8 @@ class DatabaseContextABC(ABC):
         pass
 
     @property
-    def cursor(self) -> MySQLCursorBuffered:
-        return self._cursor
+    @abstractmethod
+    def cursor(self) -> MySQLCursorBuffered: pass
     
     @abstractmethod
     def connect(self, database_settings: DatabaseSettings):

src/cpl_core/dependency_injection/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.dependency_injection'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -31,4 +31,4 @@ from .service_provider import ServiceProvider
 from .service_provider_abc import ServiceProviderABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/environment/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.environment'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -26,4 +26,4 @@ from .environment_name_enum import EnvironmentNameEnum
 from .application_environment import ApplicationEnvironment
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/logging/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.logging'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -28,4 +28,4 @@ from .logging_settings import LoggingSettings
 from .logging_settings_name_enum import LoggingSettingsNameEnum
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/mailing/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.mailing'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -28,4 +28,4 @@ from .email_client_settings import EMailClientSettings
 from .email_client_settings_name_enum import EMailClientSettingsNameEnum
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/pipes/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.pipes'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -30,4 +30,4 @@ from .to_camel_case_pipe import ToCamelCasePipe
 from .to_snake_case_pipe import ToSnakeCasePipe
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/time/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.time'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -25,4 +25,4 @@ from .time_format_settings import TimeFormatSettings
 from .time_format_settings_names_enum import TimeFormatSettingsNamesEnum
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')

src/cpl_core/utils/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_core.utils'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2020 - 2022 sh-edraft.de'
-__version__ = '2022.7.0.post4'
+__version__ = '2022.7.0.post5'
 
 from collections import namedtuple
 
@@ -26,4 +26,4 @@ from .string import String
 from .pip import Pip
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0.post4')
+version_info = VersionInfo(major='2022', minor='7', micro='0.post5')