#batch-processing code explainers

ruby

namespace :active_storage do
  desc "Purge blobs that have been unattached for more than 48 hours"
  task purge_stale: :environment do
    cutoff = 48.hours.ago

A Rake task to purge stale Active Storage blobs in Rails

rake active-storage batch-processing

Intermediate 8 steps

java

@Component
@RequiredArgsConstructor
@Slf4j
public class FailedJobReprocessor {

Retrying failed jobs on a Spring schedule

scheduling retry exponential-backoff

Intermediate 10 steps

rust

use axum::{extract::State, http::StatusCode, response::IntoResponse, Json};
use serde::{Deserialize, Serialize};
use std::sync::Arc;

Batch inserts with per-item status in Axum

batch-processing error-handling serde

Intermediate 8 steps

java

@RestController
@RequestMapping("/api/products")
@RequiredArgsConstructor
public class ProductBatchController {

Batch JSON Merge Patch in Spring

json-merge-patch rest-api partial-update

Intermediate 8 steps

python

from decimal import Decimal, ROUND_HALF_UP
 
from django.db import transaction
from django.db.models import F

Batch price updates safely in Django

decimal-precision batch-processing transactions

Advanced 8 steps

java

@Configuration
@EnableBatchProcessing
public class CustomerImportJobConfig {

How a chunk-based CSV import job works in Spring

batch-processing etl csv-parsing

Intermediate 9 steps

php

<?php
 
namespace App\Console\Commands;

Streaming CSV imports in Laravel

lazy-evaluation generators batch-processing

Intermediate 7 steps

ruby

class InactiveAccountCleanup
  BATCH_SIZE = 500
  INACTIVITY_THRESHOLD = 18.months

Batch-processing dormant users in Rails

batch-processing activerecord service-object

Intermediate 9 steps

python

from datetime import timedelta
 
from django.contrib.sessions.models import Session
from django.core.management.base import BaseCommand

A batched session-cleanup command in Django

management-command batch-processing database-cleanup

Intermediate 7 steps

java

@Repository
public interface OrderRepository extends JpaRepository<Order, Long> {
 
    @QueryHints(@QueryHint(name = HINT_FETCH_SIZE, value = "1000"))

Streaming large result sets in Spring Data JPA

streaming jpa memory-management

Advanced 6 steps