codesnips

codesnips

511 code snips · on codesnips 27 days
java 
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;

import java.time.Instant;

Nightly Cleanup of Expired Refresh Tokens with Spring @Scheduled and a Bulk Delete Query

spring-boot scheduling cron
by codesnips 4 tabs
rust 
use std::collections::HashMap;
use std::hash::Hash;

const NIL: usize = usize::MAX;

struct Node<K, V> {

Build an O(1) LRU Cache in Rust With a HashMap and Intrusive Doubly Linked List

rust lru cache
by codesnips 3 tabs
ruby 
class OrderPresenter < SimpleDelegator
  attr_reader :current_user

  def initialize(order, current_user:)
    super(order)
    @current_user = current_user

Presenter + fast_jsonapi Serializer for Clean JSON:API Responses in Rails

rails json-api serialization
by codesnips 3 tabs
python 
from django.db import models
from django.utils.text import slugify


class Article(models.Model):
    title = models.CharField(max_length=200)

Auto-Generate Unique Slugs in Django with a pre_save Signal and Model Method

django signals slugs
by codesnips 3 tabs
go 
package session

import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/base64"

Stateless Session Cookies Signed and Verified With HMAC in Go

go security cookies
by codesnips 3 tabs
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