49 lines
1.2 KiB
Python
49 lines
1.2 KiB
Python
|
from __future__ import annotations
|
||
|
|
|
||
|
|
from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession, async_sessionmaker, create_async_engine
|
||
|
|
from sqlalchemy.orm import DeclarativeBase
|
||
|
|
|
||
|
|
from app.config import Settings
|
||
|
|
|
||
|
|
|
||
|
|
class Base(DeclarativeBase):
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
_engine: AsyncEngine | None = None
|
||
|
|
_session_factory: async_sessionmaker[AsyncSession] | None = None
|
||
|
|
|
||
|
|
|
||
|
|
def init_db(settings: Settings) -> None:
|
||
|
|
global _engine, _session_factory
|
||
|
|
if _engine is not None and _session_factory is not None:
|
||
|
|
return
|
||
|
|
|
||
|
|
_engine = create_async_engine(
|
||
|
|
settings.pg_dsn,
|
||
|
|
pool_pre_ping=True,
|
||
|
|
pool_size=20,
|
||
|
|
max_overflow=40,
|
||
|
|
)
|
||
|
|
_session_factory = async_sessionmaker(_engine, expire_on_commit=False)
|
||
|
|
|
||
|
|
|
||
|
|
def get_engine() -> AsyncEngine:
|
||
|
|
if _engine is None:
|
||
|
|
raise RuntimeError("Database engine has not been initialized.")
|
||
|
|
return _engine
|
||
|
|
|
||
|
|
|
||
|
|
def get_session_factory() -> async_sessionmaker[AsyncSession]:
|
||
|
|
if _session_factory is None:
|
||
|
|
raise RuntimeError("Database session factory has not been initialized.")
|
||
|
|
return _session_factory
|
||
|
|
|
||
|
|
|
||
|
|
async def close_db() -> None:
|
||
|
|
global _engine, _session_factory
|
||
|
|
if _engine is not None:
|
||
|
|
await _engine.dispose()
|
||
|
|
_engine = None
|
||
|
|
_session_factory = None
|