mirror of
https://github.com/Dvorinka/swingmusic-extended.git
synced 2026-06-03 20:13:02 +00:00
cwilvx
46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
from contextlib import contextmanager
|
|
import gc
|
|
from sqlalchemy import Engine, event
|
|
|
|
|
|
@event.listens_for(Engine, "connect")
|
|
def set_sqlite_pragma(dbapi_connection, connection_record):
|
|
cursor = dbapi_connection.cursor()
|
|
cursor.execute("PRAGMA journal_mode=WAL")
|
|
cursor.execute("PRAGMA synchronous=NORMAL")
|
|
cursor.execute("PRAGMA cache_size=10000")
|
|
cursor.execute("PRAGMA foreign_keys=ON")
|
|
cursor.execute("PRAGMA temp_store=MEMORY")
|
|
cursor.execute("PRAGMA mmap_size=30000000000")
|
|
cursor.close()
|
|
|
|
|
|
class DbEngine:
|
|
"""
|
|
The database engine instance.
|
|
"""
|
|
|
|
engine: Engine
|
|
|
|
@classmethod
|
|
@contextmanager
|
|
def manager(cls, commit: bool = False):
|
|
"""
|
|
This context manager manages access to the database.
|
|
|
|
When the context manager is entered, it returns a session object that can be used to execute SQL statements.
|
|
|
|
If the `commit` parameter is set to `True`, the context manager will commit the transaction when it exits.
|
|
"""
|
|
conn = cls.engine.connect()
|
|
|
|
try:
|
|
yield conn.execution_options(preserve_rowcount=True)
|
|
if commit:
|
|
conn.commit()
|
|
except Exception as e:
|
|
conn.rollback()
|
|
raise e
|
|
finally:
|
|
conn.close()
|