codesnips

tracing

rust 
use tracing::{info, instrument};

#[instrument]
fn process_request(user_id: u64) {
    info!(user_id, "Processing request");
    // Work happens here

tracing for structured logging and distributed tracing

rust observability tracing
by Marcus Chen 1 tab
typescript 
import pino, { Logger } from 'pino';
import { AsyncLocalStorage } from 'node:async_hooks';

export interface Store {
  requestId: string;
  logger: Logger;

Request ID + structured logging (Express + pino)

express logging observability
by codesnips 3 tabs
typescript 
import { NodeSDK } from '@opentelemetry/sdk-node';
import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-http';
import { BatchSpanProcessor } from '@opentelemetry/sdk-trace-base';
import { getNodeAutoInstrumentations } from '@opentelemetry/auto-instrumentations-node';
import { Resource } from '@opentelemetry/resources';
import {

OpenTelemetry tracing for Node HTTP

observability tracing opentelemetry
by codesnips 3 tabs
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
typescript 
import { AsyncLocalStorage } from 'node:async_hooks';

interface Store {
  requestId: string;
}

Propagate a Request ID Through NestJS Logs with AsyncLocalStorage

nestjs logging middleware
by codesnips 4 tabs
rust 
use std::time::Instant;

use axum::{
    extract::Request,
    http::HeaderValue,
    middleware::Next,

Axum Latency Logging Middleware With Request IDs and Tracing Spans

axum tower middleware
by codesnips 2 tabs
go 
package observability

import (
  "context"

  "go.opentelemetry.io/otel"

OpenTelemetry tracer provider with ratio-based sampling

go observability opentelemetry
by Leah Thompson 1 tab
java 
package com.example.observability;

public final class CorrelationIdConstants {

    public static final String HEADER_NAME = "X-Correlation-Id";
    public static final String MDC_KEY = "correlationId";

Propagate a Correlation ID Through Every Log Line with an MDC Servlet Filter in Spring Boot

spring-boot logging mdc
by codesnips 4 tabs
php 
<?php

namespace App\Correlation;

final class CorrelationIdStorage
{

Propagate a Correlation ID Through Symfony Requests and Monolog Logs

symfony monolog logging
by codesnips 4 tabs
java 
package com.example.tracing;

import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;

Propagate a Correlation ID Through Servlet Requests With MDC and a Feign Interceptor

java servlet filter
by codesnips 3 tabs
go 
package logctx

import (
	"context"
	"log/slog"
)

Request-Scoped Structured Logging with slog and Context in Go

go logging slog
by codesnips 3 tabs
javascript 
const pino = require('pino');
const { AsyncLocalStorage } = require('async_hooks');

const als = new AsyncLocalStorage();

const logger = pino({

Request-Scoped Correlation ID Middleware and Child Logger in Express

express middleware logging
by codesnips 3 tabs