Dedicated to sharing programmer-architect skills—Java backend, system, microservice, and distributed architectures—to help you become a senior architect.
The article enumerates eight common MySQL query patterns—such as large‑offset LIMIT, implicit type conversion, sub‑query updates, mixed ordering, unnecessary EXISTS, poor condition push‑down, early range reduction, and inefficient intermediate result handling—and shows rewritten SQL that reduces execution time from seconds to milliseconds.
The article introduces a visual drag‑and‑drop data flow platform that unifies stream and batch processing, offers version control, automatic fault tolerance, configurable data permissions, comprehensive monitoring, data alignment, and query templates, and presents single‑instance performance benchmarks of over 30k and 60k ops/s.
This article walks developers through the OSI model, explains TCP's three‑way handshake and four‑way termination, contrasts TCP with UDP, addresses common networking questions, and details how to implement long‑lived socket connections and a reusable socket connection pool in Node.js.
The article examines the limitations of UUIDs for distributed systems, outlines the strict requirements for global unique IDs, compares common approaches such as database auto‑increment and Redis, and provides a detailed analysis of Twitter's Snowflake algorithm with its structure, Java implementation, advantages, drawbacks, and mitigation strategies.
This article walks through the reasons for abandoning Nacos in favor of Apollo and provides a step‑by‑step tutorial that covers Apollo’s core concepts, architecture, client integration with Spring Boot, dynamic updates, environment/cluster/namespace handling, and deployment on Kubernetes.
This article introduces Alibaba’s open‑source DataX tool, explains its framework‑plugin architecture for heterogeneous database sync, walks through Linux installation, job configuration, full‑ and incremental MySQL synchronization, and shares performance results and practical tips.
The article provides a side‑by‑side analysis of Spring AI 2.0 and LangChain4j, comparing their goals, version alignment, programming models, RAG and agent capabilities, ecosystem integration, learning curve, and operational considerations to help Java teams decide which library best fits their project constraints.
This article walks through using RSA to encrypt Spring Boot API responses, covering the theory behind RSA, two security scenarios, Maven dependency setup, configuration, controller annotations, encryption/decryption code, a front‑end JavaScript example, common pitfalls, and a final security summary.
The article introduces the liteflow rule‑engine framework, explains its architecture, component types, EL rule files, data‑context handling, configuration options, and demonstrates a real‑world e‑commerce workflow that replaces verbose if‑else code with concise rule definitions.
The article explains how "Token"—the smallest unit of AI processing—has become a measurable, priceable, and allocatable resource that companies are treating as a fourth form of compensation, shifting focus from time to AI‑amplified ability and productivity.
