Dedicated to sharing programmer-architect skills—Java backend, system, microservice, and distributed architectures—to help you become a senior architect.
This article explains why both front‑end and back‑end data validation are essential for modern web applications, outlines the specific checks each layer should perform, and describes the combined benefits for security, data integrity, and user experience.
This guide explains how to determine the heap memory consumption of individual HTTP and RPC calls in a SpringBoot application by setting up a JMeter load test, enabling detailed GC logging, and analyzing the results to optimize JVM parameters and improve performance.
To protect API traffic from scraping, tampering, replay attacks, and ensure data integrity, this guide outlines a hybrid encryption scheme that combines symmetric AES, asymmetric RSA, hash‑based signatures, and HTTPS principles, detailing design, implementation steps, common issues, and security analysis.
This article compares four pagination strategies—standard LIMIT/OFFSET, primary‑key filtering, has‑more scrolling, and Elasticsearch pagination—explaining their trade‑offs, performance impacts, and suitable use cases while providing concrete SQL and Java code examples.
This article explains the purpose of MySQL's optimizer_switch prefer_ordering_index, shows how it affects ORDER BY and GROUP BY queries with LIMIT, provides code examples and EXPLAIN output, and argues that disabling it often yields better performance for skewed data distributions.
This article traces the evolution from HTTP/1.1 to HTTP/3, explains how QUIC leverages UDP to achieve faster, secure connections, and details its handshake, connection migration, head‑of‑line blocking solutions, congestion and flow control mechanisms.
This guide explains why Docker image pulls often time out in China, shows that many online mirror lists are outdated, and provides three verified registry mirrors with step‑by‑step configuration, testing instructions, and practical tips to keep Docker pulling fast and reliable.
This guide introduces RedisInsight, a powerful Redis GUI, and provides step‑by‑step instructions for physical and Kubernetes installations, environment configuration, service startup, and basic usage including Redis setup and UI operations, all illustrated with code snippets and screenshots.
This guide explains how to improve Spring Boot configuration management by defining configuration values as Java enums, mapping them with @ConfigurationProperties, and displaying them via a Thymeleaf front‑end, including Maven dependencies, YAML settings, enum class, config class, controller, and HTML template examples.
This tutorial walks through the fundamentals of large language models, prompt engineering, and word embeddings, then shows how to set up a LangChain‑based LLM stack in Java using LangChain4j, covering core modules, memory, retrieval, chains, agents, and complete code examples.
