fastapi-lifespan-manager

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fastapi-lifespan-manager

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FastAPI LifespanManager 🧑‍⚖️

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<h1 align="center">
Fastapi LifespanManager
</h1>

`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:

```bash
pip install fastapi-lifespan-manager
```

Usage Example:

```python
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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