Supported MySQL Changes Listening

utils/scripts.py

@@ -1,14 +1,42 @@
 # add_user.py
 
-import asyncio, logging
+import asyncio, logging, pymysql
 import secrets
 from sqlalchemy.future import select
-from sqlalchemy.exc import IntegrityError
-from getpass import getpass
 from data.db import engine, SessionLocal
 from data.models import Base, User, UserRole
 
 
+async def startup():
+    from dbs import mysql    
+    from app.operations import feed_databases_changes_ws
+    await pools_creator()
+    await mysql_streams_listeners_creator()
+    mysql.cached_cursors_cleaner_task = asyncio.create_task(mysql.cached_cursors_cleaner())
+    
+
+async def shutdown():
+    from dbs import mysql
+    mysql.cached_cursors_cleaner_task.cancel()
+    try:
+        await mysql.cached_cursors_cleaner_task
+    except asyncio.CancelledError:
+        print('Closed cached_cursors_cleaner_task')
+    await cursors_closer()
+    await pools_destroy()
+
+    from utils.binlog import destroy
+    destroy()
+    
+
+async def mysql_streams_listeners_creator():
+    from data.crud import read_all_connections
+    async with SessionLocal() as db:
+        connections = await read_all_connections(db=db)
+    
+    from utils.binlog import start_listeners
+    start_listeners(connections=connections)
+
 async def pools_creator():
     from data.crud import read_all_connections
     from dbs import mysql
@@ -17,7 +45,11 @@ async def pools_creator():
         connections = await read_all_connections(db=db)
 
     for connection in connections:
-        mysql.pools[connection.id] = await mysql.pool_creator(connection=connection)
+        try:
+            mysql.pools[connection.id] = await mysql.pool_creator(connection=connection)
+        except pymysql.err.OperationalError as e:
+            print(e)
+        
     logging.info(msg='Created Pools')
 
 async def cursors_closer():