codesnips

asyncio

python 
import contextvars
import uuid

_correlation_id: contextvars.ContextVar[str] = contextvars.ContextVar(
    "correlation_id", default="-"
)

Propagating a Correlation ID Through contextvars in FastAPI

fastapi contextvars middleware
by codesnips 4 tabs
python 
import asyncio
import time
from dataclasses import dataclass, field


@dataclass

Per-Client Rate Limiting in FastAPI with a Token Bucket Dependency

python fastapi rate-limiting
by codesnips 3 tabs
python 
import threading


class MinuteRingBuffer:
    def __init__(self, window_minutes=15):
        if window_minutes < 1:

Rolling Per-Minute Log Aggregation with a Ring Buffer

logging metrics observability
by codesnips 3 tabs
python 
import asyncio
from typing import Awaitable, Callable, Dict, TypeVar

T = TypeVar("T")

Coalesce Duplicate In-Flight Requests with an Asyncio Single-Flight Cache

asyncio concurrency caching
by codesnips 3 tabs