69 lines
2 KiB
Python
69 lines
2 KiB
Python
import contextlib
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from typing import AsyncIterator, AsyncGenerator
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from fooder.settings import Settings, settings
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from sqlalchemy.ext.asyncio import (
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AsyncConnection,
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AsyncSession,
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async_sessionmaker,
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create_async_engine,
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)
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class DatabaseSessionManager:
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def __init__(self, settings: Settings) -> None:
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self._engine = create_async_engine(
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settings.DB_URI,
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pool_pre_ping=True,
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echo=settings.ECHO_SQL,
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connect_args=(
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{"check_same_thread": False}
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if settings.DB_URI.startswith("sqlite")
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else {}
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),
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)
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self._sessionmaker = async_sessionmaker(
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autocommit=False, autoflush=False, future=True, bind=self._engine
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)
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async def close(self) -> None:
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if self._engine is None:
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raise Exception("DatabaseSessionManager is not initialized")
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await self._engine.dispose()
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self._engine = None
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self._sessionmaker = None
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@contextlib.asynccontextmanager
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async def connect(self) -> AsyncIterator[AsyncConnection]:
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if self._engine is None:
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raise Exception("DatabaseSessionManager is not initialized")
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async with self._engine.begin() as connection:
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try:
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yield connection
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except Exception:
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await connection.rollback()
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raise
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@contextlib.asynccontextmanager
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async def session(self) -> AsyncIterator[AsyncSession]:
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if self._sessionmaker is None:
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raise Exception("DatabaseSessionManager is not initialized")
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session = self._sessionmaker()
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try:
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yield session
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except Exception:
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await session.rollback()
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raise
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finally:
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await session.close()
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session_manager = DatabaseSessionManager(settings)
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async def get_db_session() -> AsyncGenerator[AsyncSession, None]:
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async with session_manager.session() as session:
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yield session
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