Fastapi LifespanManager
fastapi-lifespan-manager is a Python library that provides a lifespan manager for FastAPI applications.
The LifespanManager in fastapi-lifespan-manager allows you to have multiple lifespan in one
application.
This library is particularly useful for managing background tasks, such as starting and stopping a database connection or managing a cache, as well as for performing cleanup tasks, such as closing open file handles or shutting down running processes.
To use fastapi-lifespan-manager, simply install it via pip:
pip install fastapi-lifespan-managerUsage Example:
from typing import AsyncIterator
from fastapi import FastAPI
from redis.asyncio import Redis
from sqlalchemy.ext.asyncio import create_async_engine
from fastapi_lifespan_manager import LifespanManager, State
manager = LifespanManager()
@manager.add
async def setup_db(app: FastAPI) -> AsyncIterator[State]:
engine = await create_async_engine("postgresql+asyncpg://user:password@localhost/db")
yield {"db": engine}
await engine.dispose()
@manager.add
async def setup_cache(app: FastAPI) -> AsyncIterator[State]:
redis = await Redis.from_url("redis://localhost:6379/0")
yield {"cache": redis}
await redis.close()
await redis.wait_closed()
app = FastAPI(lifespan=manager)
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