codesnips
java 
package com.example.api.error;

import com.fasterxml.jackson.annotation.JsonInclude;

import java.time.Instant;
import java.util.List;

Consistent JSON Error Responses with @RestControllerAdvice in Spring Boot

spring-boot rest-api error-handling
by codesnips 4 tabs
ruby 
module Notifications
  class RecipientSerializer < ActiveJob::Serializers::ObjectSerializer
    def serialize?(argument)
      argument.is_a?(Notifications::Recipient)
    end

Enqueuing Notification Batches with a Custom Active Job Argument Serializer for Value Objects

rails active-job serialization
by codesnips 4 tabs
php 
<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

Batching Laravel Queue Jobs to Roll Up Daily Order Totals With a Completion Callback

laravel queues background-jobs
by codesnips 3 tabs
ruby 
require "rack/attack"
require "redis-store"

class Rack::Attack
  cache.store = Redis::Store.new(url: ENV.fetch("REDIS_URL", "redis://localhost:6379/1"))

Rate-Limiting a Sinatra JSON API With Rack::Attack Throttles and Redis

sinatra rack rack-attack
by codesnips 3 tabs
python 
import errno
import fcntl
import os
import time

File-Based Locking to Prevent Concurrent Cron Job Runs in Python

locking concurrency fcntl
by codesnips 3 tabs
rust 
use std::any::Any;

pub trait CommandHandler {
    fn name(&self) -> &str;

    fn handle(&self, input: &dyn Any) -> Box<dyn Any>;

Type-Erased Command Handler Registry With Trait Objects in Rust

rust trait-objects dispatch
by codesnips 3 tabs
typescript 
import { Knex } from 'knex';

export interface RawDailyRow {
  day: string;
  order_count: string;
  gross_cents: string;

Aggregate Daily Order Totals Into a Report With Knex and a Formatter

knex postgres reporting
by codesnips 3 tabs
lua 
local key = KEYS[1]
local capacity = tonumber(ARGV[1])
local rate = tonumber(ARGV[2])
local now = tonumber(ARGV[3])
local ttl = tonumber(ARGV[4])

Redis-Backed Token Bucket Rate Limiter with Lua Atomic Refill in Go

rate-limiting token-bucket redis
by codesnips 3 tabs
java 
package com.example.security;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.security.Keys;
import org.springframework.beans.factory.annotation.Value;

Stateless JWT Authentication with a Token Service and a Spring Security Filter

spring-security jwt authentication
by codesnips 3 tabs
java 
@Configuration
@EnableScheduling
@EnableConfigurationProperties(CleanupProperties.class)
public class SchedulingConfig {

    @Bean(destroyMethod = "shutdown")

Recurring Cleanup Job with Spring @Scheduled and a Shutdown-Aware Executor

spring spring-boot scheduling
by codesnips 3 tabs
python 
import functools
import threading


def debounce(wait):
    def decorator(func):

Debounce Repeated Function Calls With a Thread-Safe Python Decorator

python decorators debounce
by codesnips 2 tabs
typescript 
import { AxiosError } from 'axios';

export const RETRY_CONFIG = {
  maxRetries: 4,
  baseDelayMs: 200,
  maxDelayMs: 5_000,

Exponential-Backoff Retry Interceptor Around NestJS HttpService

nestjs http retry
by codesnips 3 tabs