Python & FastAPI•Part 4: Web Frameworks, APIs & FastAPI (41 - 55)
BackgroundTasks vs Celery:
In Simple Words:
- FastAPI BackgroundTasks: Runs in-process in the same service after returning the HTTP response. Best for lightweight tasks (sending a welcome email).
- Celery: Distributed task queue backed by Redis/RabbitMQ. Survives process crashes and handles heavy batch processing across external worker fleets.
python
from fastapi import BackgroundTasks
def send_email_notification(email: str):
# Simulated email sending
print(f"Sent email to {email}")
@app.post("/register")
async def register(email: str, background_tasks: BackgroundTasks):
background_tasks.add_task(send_email_notification, email)
return {"message": "Registration successful, email queued"}