codesnips
java 
package com.example.fx.config;

import com.github.benmanes.caffeine.cache.Caffeine;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.caffeine.CaffeineCacheManager;

Caching Currency-Conversion Rates in Spring Boot With @Cacheable and Scheduled Eviction

spring-boot caching caffeine
by codesnips 3 tabs
javascript 
const express = require('express');
const { enqueueEmail } = require('./emailQueue');

const router = express.Router();

router.post('/users/:id/welcome-email', async (req, res, next) => {

Reliable Background Email Jobs With BullMQ, Redis, and a Worker Process

bullmq redis background-jobs
by codesnips 3 tabs
ruby 
require 'sinatra/base'
require 'json'
require_relative 'signature_verifier'

class WebhookApp < Sinatra::Base
  configure do

Verifying Stripe Webhook Signatures in Sinatra with a before Filter

sinatra webhooks stripe
by codesnips 2 tabs
rust 
use std::fmt;

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum OrderState {
    Pending,
    Paid,

Type-State Order Lifecycle Machine With Compile-Time Transition Safety in Rust

state-machine enums type-state
by codesnips 3 tabs
typescript 
export interface Page<T> {
  items: T[];
  nextCursor: string | null;
}

export interface Post {

Infinite-Scroll List in React with IntersectionObserver and Cursor Pagination

react hooks infinite-scroll
by codesnips 3 tabs
python 
from typing import Optional
from pydantic import BaseModel, EmailStr, Field, field_validator, model_validator


class CreateUserRequest(BaseModel):
    model_config = {"extra": "forbid"}

Validating JSON Payloads with Pydantic v2 and Returning Field-Level Errors in FastAPI

fastapi pydantic validation
by codesnips 3 tabs
java 
import java.time.Duration;
import java.util.concurrent.ThreadLocalRandom;
import java.util.function.Predicate;

public final class RetryPolicy {
    private final int maxAttempts;

Async Retry With Exponential Backoff and Full Jitter Using ScheduledExecutorService

java retry backoff
by codesnips 3 tabs
javascript 
import { useEffect, useState } from "react";

export function useDebouncedValue(value, delay = 300) {
  const [debounced, setDebounced] = useState(value);

  useEffect(() => {

Debounced Search Input in React with a Reusable useDebouncedValue Hook

react hooks debounce
by codesnips 3 tabs
php 
<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Http\Resources\PostResource;

Cursor Pagination for Eloquent Queries Exposed as a JSON API in Laravel

laravel eloquent pagination
by codesnips 3 tabs
python 
from django.conf import settings
from django.db.models.signals import post_save
from django.dispatch import receiver

from .models import EmailOutbox

Sending Welcome Emails via a Django post_save Signal and Outbox Worker

django signals email
by codesnips 4 tabs
go 
package feed

import "time"

type Event struct {
	ID        string    `json:"id"`

Stream and Decode Newline-Delimited JSON (NDJSON) from an HTTP Response Body in Go

go ndjson streaming
by codesnips 3 tabs
ruby 
class Current < ActiveSupport::CurrentAttributes
  attribute :tenant, :request_id

  def tenant=(tenant)
    super
    Rails.logger.tagged("tenant=#{tenant&.id}") if tenant

Tenant Isolation in Rails with CurrentAttributes and an around_action

rails multi-tenancy current-attributes
by codesnips 4 tabs