borrow some of the previous PRs reconnection code

backend/apps/webui/internal/db.py

@@ -46,7 +46,7 @@ router = Router(
 )
 router.run()
 try:
-    DB.connect()
+    DB.connect(reuse_if_open=True)
 except OperationalError as e:
     log.info(f"Failed to connect to database again due to: {e}")
     pass
\ No newline at end of file

backend/apps/webui/internal/wrappers.py

 from contextvars import ContextVar
 from peewee import *
+from peewee import PostgresqlDatabase, InterfaceError as PeeWeeInterfaceError
+
 import logging
-from playhouse.db_url import connect
+from playhouse.db_url import connect, parse
 
 from config import SRC_LOG_LEVELS
 
@@ -23,15 +25,32 @@ class PeeweeConnectionState(object):
         value = self._state.get()[name]
         return value
 
+class CustomReconnectMixin(ReconnectMixin):
+    reconnect_errors = (
+        # psycopg2
+        (OperationalError, 'termin'),
+        (InterfaceError, 'closed'),
+        # peewee
+        (PeeWeeInterfaceError, 'closed'),
+    )
+
+class ReconnectingPostgresqlDatabase(CustomReconnectMixin, PostgresqlDatabase):
+    pass
+
 def register_connection(db_url):
     db = connect(db_url)
     if isinstance(db, PostgresqlDatabase):
         # Enable autoconnect for SQLite databases, managed by Peewee
         db.autoconnect = True
+        db.reuse_if_open = True
         log.info("Connected to PostgreSQL database")
+        connection = parse(db_url)
+        db = ReconnectingPostgresqlDatabase(connection['database'], user=connection['user'], password=connection['password'],host=connection['host'], port=connection['port'])
+        db.connect(reuse_if_open=True)
     elif isinstance(db, SqliteDatabase):
         # Enable autoconnect for SQLite databases, managed by Peewee
         db.autoconnect = True
+        db.reuse_if_open = True
         log.info("Connected to SQLite database")
     else:
         raise ValueError('Unsupported database connection')