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Java Architect Handbook

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Latest from Java Architect Handbook

91 recent articles

Java Architect Handbook

Mar 27, 2026 · Frontend Development

Mastering CORS: In‑Depth Java Interview Guide for Cross‑Origin Solutions

This comprehensive guide explains the browser same‑origin policy, why cross‑origin restrictions exist, and walks through five major solutions—CORS, proxy servers, JSONP, postMessage, and WebSocket—detailing their principles, advantages, drawbacks, configuration examples, and best‑practice recommendations for interview scenarios.

CORSCross-OriginJava

0 likes · 16 min read

Mastering CORS: In‑Depth Java Interview Guide for Cross‑Origin Solutions

Java Architect Handbook

Mar 26, 2026 · Artificial Intelligence

30+ Real-World OpenClaw Use Cases: Automate Tasks with AI Agents

This article introduces the open-source "awesome-openclaw-usecases" repository, which curates over thirty practical AI agent workflows across six functional modules—social media, creative building, infrastructure & DevOps, productivity, research & learning, and finance—providing step‑by‑step guidance and example configurations for each use case.

AI agentsAutomationGitHub

0 likes · 8 min read

30+ Real-World OpenClaw Use Cases: Automate Tasks with AI Agents

Java Architect Handbook

Mar 25, 2026 · Fundamentals

TCP vs UDP: Deep Dive for Java Interview Success

This guide breaks down the core differences between TCP and UDP—including connection handling, reliability, header overhead, transmission mode, and real‑world use cases—while providing interview focus points, concise answer tables, detailed analysis, common follow‑up questions, and handy mnemonics for Java developers.

Java InterviewNetworkingProtocol Comparison

0 likes · 14 min read

TCP vs UDP: Deep Dive for Java Interview Success

Java Architect Handbook

Mar 23, 2026 · Frontend Development

Mastering CORS and Cross‑Domain Solutions for Java Interviews

This guide explains the browser same‑origin policy, why cross‑origin restrictions exist, and presents five practical solutions—including CORS, proxy servers, JSONP, postMessage, and WebSocket—along with detailed configuration examples, code snippets, performance tips, and common interview follow‑up questions.

Browser SecurityCORSCross-Origin

0 likes · 13 min read

Mastering CORS and Cross‑Domain Solutions for Java Interviews

Java Architect Handbook

Mar 22, 2026 · Backend Development

Hidden 70 ms Delay in Spring Boot: Tomcat Embed Bug Triggered by Swagger UI

After optimizing a Spring Boot channel service, a mysterious extra ~100 ms appeared per request; detailed tracing with Arthas revealed that embedded Tomcat repeatedly loads Swagger UI META‑INF resources, causing a 70 ms overhead, which can be eliminated by upgrading Tomcat or removing the Swagger dependencies.

ArthasEmbedded Tomcat BugPerformance debugging

0 likes · 30 min read

Hidden 70 ms Delay in Spring Boot: Tomcat Embed Bug Triggered by Swagger UI

Java Architect Handbook

Mar 21, 2026 · Backend Development

Hot-Reload Java Code Without Restart: Compare Spring Boot DevTools, IDEA HotSwap, and JRebel

This guide explains why hot‑reloading Java code is essential for large Spring Boot projects, compares three approaches—Spring Boot DevTools, IntelliJ IDEA's built‑in HotSwap, and the JRebel plugin—and provides step‑by‑step installation and usage instructions for each method.

Hot ReloadIntelliJ IDEAJRebel

0 likes · 8 min read

Hot-Reload Java Code Without Restart: Compare Spring Boot DevTools, IDEA HotSwap, and JRebel

Java Architect Handbook

Mar 19, 2026 · Information Security

Why HTTPS Beats HTTP: Deep Dive for Java Interview Success

This article provides a comprehensive technical guide for Java interviewers, detailing HTTP’s security flaws, how HTTPS resolves them through SSL/TLS encryption, certificate verification, and hybrid cryptography, and includes handshake steps, performance comparisons, common follow‑up questions, and concise memory mnemonics.

HTTPHTTPSJava Interview

0 likes · 14 min read

Why HTTPS Beats HTTP: Deep Dive for Java Interview Success

Java Architect Handbook

Mar 18, 2026 · Information Security

How to Enable Fuzzy Search on Encrypted Data: Methods, Pros & Cons

This article analyzes three categories of techniques—naïve, conventional, and advanced—for performing fuzzy queries on encrypted fields, compares their memory and performance trade‑offs, provides concrete code examples and storage calculations, and recommends the most practical approach for production systems.

Query Optimizationdatabase securityencrypted data

0 likes · 13 min read

How to Enable Fuzzy Search on Encrypted Data: Methods, Pros & Cons

Java Architect Handbook

Mar 16, 2026 · Backend Development

Cookie vs Session vs Token: Master Java Authentication for Interviews

This guide outlines interview focus points, core definitions, and deep analysis of Cookie, Session, and Token (JWT), compares their storage, security, scalability, and cross‑origin support, and provides high‑frequency follow‑up questions, common variants, memory mnemonics, and selection principles for Java authentication.

AuthenticationJWTJava

0 likes · 15 min read

Cookie vs Session vs Token: Master Java Authentication for Interviews

Java Architect Handbook

Mar 15, 2026 · Backend Development

Why Open Session in View Can Kill Your Spring Boot Performance (And How to Fix It)

The article explains what Open Session in View (OSIV) is, why keeping a Hibernate Session open for the whole request can silently cause massive N+1 query problems in Spring Boot REST APIs, and provides a concrete example and step‑by‑step solution using explicit fetch joins and disabling OSIV.

HibernateN+1 QueryOSIV

0 likes · 8 min read

Why Open Session in View Can Kill Your Spring Boot Performance (And How to Fix It)