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Java Architect Handbook

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Latest from Java Architect Handbook

91 recent articles

Java Architect Handbook

Apr 28, 2026 · Backend Development

SpringBoot + Disruptor: Achieving 6 Million Orders per Second with Ultra‑Fast Concurrency

This article explains why Disruptor—a lock‑free, high‑throughput Java queue from LMAX—was chosen over traditional brokers, details its core concepts such as RingBuffer, Sequence, and WaitStrategy, and provides a step‑by‑step SpringBoot demo that can handle up to six million orders per second without pressure.

DisruptorHigh ConcurrencyJava

0 likes · 13 min read

SpringBoot + Disruptor: Achieving 6 Million Orders per Second with Ultra‑Fast Concurrency

Java Architect Handbook

Apr 25, 2026 · Backend Development

Why MyBatis Mapper Interfaces Don't Need Implementation Classes

MyBatis generates mapper implementations at runtime using JDK dynamic proxies; the proxy intercepts interface calls, builds a statementId from the interface’s fully‑qualified name and method name, looks up the corresponding MappedStatement via the namespace‑id convention, and delegates execution to SqlSession, eliminating the need for a concrete class.

JDK Dynamic ProxyJavaMapperMethod

0 likes · 13 min read

Why MyBatis Mapper Interfaces Don't Need Implementation Classes

Java Architect Handbook

Apr 24, 2026 · Interview Experience

Why Use Coroutines When Threads Already Exist? Java Interview Deep Dive

An interview‑focused analysis explains how processes allocate resources, threads handle CPU scheduling, and coroutines act as lightweight user‑mode threads, comparing their creation costs, switching overhead, and memory usage, and highlights Java 19/21 virtual threads as the Java implementation of coroutines.

JavaVirtual Threadsconcurrency

0 likes · 13 min read

Why Use Coroutines When Threads Already Exist? Java Interview Deep Dive

Java Architect Handbook

Apr 23, 2026 · Interview Experience

Meituan Second Interview: Solving High RocketMQ Consumption Latency in Production

During a Meituan second-round interview, the candidate explains how to diagnose and resolve high RocketMQ consumption latency in production, outlining a three‑step approach—stop the bleeding, recover service, and cure the root cause—through consumer scaling, message forwarding, logic optimization, concurrency tuning, queue expansion, and monitoring.

Consumer LagInterview preparationJava

0 likes · 14 min read

Meituan Second Interview: Solving High RocketMQ Consumption Latency in Production

Java Architect Handbook

Apr 22, 2026 · Backend Development

How Changing Five Lines of Code Boosted API Throughput Over 10×

A low‑traffic B2B service struggled to meet a 500 req/s demand, achieving only 50 req/s with high CPU usage; through systematic profiling, lock analysis, async refactoring, thread‑pool tuning, and eliminating costly Spring bean creation, the team dramatically improved response times and throughput, revealing deeper CPU‑usage mysteries.

JavaPerformance optimizationSpring

0 likes · 16 min read

How Changing Five Lines of Code Boosted API Throughput Over 10×

Java Architect Handbook

Apr 21, 2026 · Information Security

How to Secure Spring Boot APIs with RSA Encryption: A Step‑by‑Step Guide

This article explains RSA encryption fundamentals, illustrates two practical scenarios, and walks through creating a Spring Boot project, adding Maven dependencies, configuring RSA keys, annotating controllers for automatic encryption/decryption, testing the endpoints, and handling client‑side encryption with JavaScript, while highlighting common pitfalls.

API securityJavaRSA

0 likes · 13 min read

How to Secure Spring Boot APIs with RSA Encryption: A Step‑by‑Step Guide

Java Architect Handbook

Apr 20, 2026 · Backend Development

Concurrency vs Parallelism in Java: Definitions, CPU Mechanics, and Interview Tips

The article explains how concurrency differs from parallelism by defining logical versus physical simultaneity, illustrates the concepts with everyday analogies and CPU scheduling details, provides Java code examples, lists common interview follow‑up questions, and offers a concise mnemonic for remembering the distinction.

CPUJavabackend development

0 likes · 10 min read

Concurrency vs Parallelism in Java: Definitions, CPU Mechanics, and Interview Tips

Java Architect Handbook

Apr 18, 2026 · Databases

Redis Persistence Deep Dive: RDB, AOF, and Hybrid Strategies for Interview Success

This article provides a comprehensive analysis of Redis persistence mechanisms—including RDB snapshots, AOF append‑only logs, and the hybrid RDB+AOF mode—covering their architectures, trigger methods, performance trade‑offs, rewrite processes, interview‑focused questions, and practical recommendations for production environments.

AOFHybridPersistence

0 likes · 11 min read

Redis Persistence Deep Dive: RDB, AOF, and Hybrid Strategies for Interview Success

Java Architect Handbook

Apr 16, 2026 · Industry Insights

Can Linux Replace Windows? A Developer’s Real‑World Evaluation

This article examines whether Linux can serve as a practical daily‑use operating system, covering its graphical interface, development tool support, communication apps, Windows‑replacement capabilities, Android app execution via xDroid, and the core advantages of elegance, efficiency, and freedom, illustrated with screenshots and personal software lists.

Command LineDesktop EnvironmentDevelopment

0 likes · 12 min read

Can Linux Replace Windows? A Developer’s Real‑World Evaluation

Java Architect Handbook

Apr 14, 2026 · Backend Development

Why RocketMQ Beats Kafka and RabbitMQ in Java Interviews: 6 Core Advantages

This article breaks down the interview focus points for messaging middleware, explains RocketMQ's "Three High and One Rich" advantages—high throughput, reliability, consistency, and rich features—compares it with Kafka and RabbitMQ, presents six detailed reasons with code samples, a selection decision tree, common interview variants, memory mnemonics, and a concise conclusion for Java developers.

Delayed MessageJava InterviewMessage Queue

0 likes · 15 min read

Why RocketMQ Beats Kafka and RabbitMQ in Java Interviews: 6 Core Advantages