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Java Companion

Apr 3, 2026 · Cloud Native

Why Every Microservice Architecture Needs an API Gateway

The article explains that without a gateway each microservice must duplicate authentication, rate‑limiting, logging and other cross‑cutting concerns, leading to maintenance overhead and security risks, and shows how a gateway centralises these functions while providing routing, load‑balancing, circuit‑breaking and observability, backed by real‑world code examples and a comparative analysis of popular gateway solutions.

API GatewayAuthenticationRate Limiting

0 likes · 19 min read

Why Every Microservice Architecture Needs an API Gateway

Java Companion

Apr 2, 2026 · Backend Development

Why Java 26’s New UUID API Fixes the Biggest UUID Pitfall

The article explains how random UUIDs degrade database write performance, introduces the RFC 9562 UUIDv7 format that embeds a timestamp for natural ordering, shows JDK 26’s new UUID.ofEpochMillis() API, discusses its monotonicity limitation, and compares UUIDv7 with Snowflake and ULID for practical ID generation.

Database IndexingJDK 26Java

0 likes · 12 min read

Why Java 26’s New UUID API Fixes the Biggest UUID Pitfall

Java Companion

Mar 28, 2026 · Backend Development

How IntelliJ IDEA 2026.1 Turns Into an Open AI Development Platform

IntelliJ IDEA 2026.1 redefines the IDE as an open AI collaboration platform, introducing the ACP protocol for any AI agent, native Git Worktree sandboxing, database access, Spring runtime insights, and expanded community‑edition capabilities, dramatically reshaping developer workflows and toolchains.

ACP ProtocolAI integrationGit Worktree

0 likes · 7 min read

How IntelliJ IDEA 2026.1 Turns Into an Open AI Development Platform

Java Companion

Mar 27, 2026 · Industry Insights

Unveiling China’s Top Eight Software Outsourcing Companies

The article examines why eight Chinese software outsourcing firms dominate the market, outlines each company's scale, core projects, advantages and drawbacks, and offers guidance on which types of programmers might thrive or struggle in such environments.

Career AdviceChina IT industryIT employment

0 likes · 13 min read

Unveiling China’s Top Eight Software Outsourcing Companies

Java Companion

Mar 26, 2026 · Backend Development

Unlocking Spring Boot’s ‘Black Magic’: A Practical Guide to Plugin‑Based Development

This article explains how Spring Boot’s plugin mechanisms—such as Java SPI, custom configuration files, and Spring Factories—enable module decoupling, extensibility, and easy third‑party integration, and walks through complete code examples and a real‑world SMS‑sending case study.

Java SPISpring Bootplugin architecture

0 likes · 20 min read

Unlocking Spring Boot’s ‘Black Magic’: A Practical Guide to Plugin‑Based Development

Java Companion

Mar 24, 2026 · Backend Development

Spring 7.0.4 Unveiled: 40+ New Features, 15 Fixes, and the End of the Classic Deadlock

A real‑world K8s pod hang caused by a race between Spring's shutdown paths triggered a classic deadlock in versions 7.0.0‑7.0.3, which Spring 7.0.4 resolves along with 40+ new features, performance boosts, and dozens of other bug fixes, offering concrete upgrade guidance for developers.

BackendDeadlockJava

0 likes · 14 min read

Spring 7.0.4 Unveiled: 40+ New Features, 15 Fixes, and the End of the Classic Deadlock

Java Companion

Mar 22, 2026 · Backend Development

How to Seamlessly Integrate Tess4j OCR into a SpringBoot Application

This tutorial walks through the fundamentals of OCR, explains how to download the required Tesseract traineddata files, shows how to add Tess4j as a Maven dependency, configure SpringBoot with custom properties, and provides complete Java test code for Chinese, English, and mixed‑language image recognition, highlighting performance considerations and file‑naming requirements.

BackendJavaOCR

0 likes · 9 min read

How to Seamlessly Integrate Tess4j OCR into a SpringBoot Application

Java Companion

Mar 20, 2026 · Cloud Native

Why Does Traffic Still Hit a Shut‑Down Instance After Marking It Offline in Nacos?

The article explains why a service instance marked offline in Nacos can still receive traffic due to client‑side cache delays and UDP push loss, and it presents step‑by‑step loss‑less shutdown solutions using Kubernetes PreStop hooks, client retries, and Spring Boot graceful shutdown.

KubernetesLoad BalancerNacos

0 likes · 8 min read

Why Does Traffic Still Hit a Shut‑Down Instance After Marking It Offline in Nacos?

Java Companion

Mar 17, 2026 · Backend Development

Three Hot‑Reload Methods for Spring Boot in IDEA – Why JRebel Is the Best

When Spring Boot projects grow, restart times can reach minutes, slowing development, so the article compares three hot‑reload approaches—spring‑boot‑devtools, IDEA’s built‑in HowSwap, and the JRebel plugin—detailing their setup, limitations, and why JRebel is the most effective.

IntelliJ IDEAJRebelSpring Boot

0 likes · 5 min read

Three Hot‑Reload Methods for Spring Boot in IDEA – Why JRebel Is the Best

Java Companion

Mar 13, 2026 · Backend Development

Master Nginx Virtual Hosts: Domain, IP, and Port Configurations Explained

This step‑by‑step guide shows how to configure Nginx virtual hosts using domain names, IP addresses, and ports, covering directory preparation, nginx.conf edits, syntax testing, service reload, and client verification for each method.

Domain ConfigurationIP ConfigurationNginx

0 likes · 10 min read

Master Nginx Virtual Hosts: Domain, IP, and Port Configurations Explained