Focused on Java interview questions and practical article sharing, covering algorithms, databases, Spring Boot, microservices, high concurrency, JVM, Docker containers, and ELK-related knowledge. Looking forward to progressing together with you.
This article reviews five IntelliJ IDEA plugins—Alibaba Java Coding Guidelines, CheckStyle, PMD, FindBugs, and SonarLint—detailing their installation, usage, and strengths for enforcing coding standards, detecting bugs, and improving code quality in Java projects.
DynamicTp is a lightweight Spring Boot framework that enables runtime dynamic adjustment of thread pool parameters via configuration centers like Nacos and Apollo, provides real-time monitoring through MicroMeter and JSON logs, and integrates alerting for queue capacity, thread activity, rejection rates, and task timeouts across both application and third-party component thread pools.
A detailed walkthrough of investigating a compromised Linux server showing 100% CPU usage, revealing replaced system binaries, hidden cron jobs, LD_PRELOAD rootkit persistence, and step-by-step recovery using clean binaries and file attribute manipulation.
This article explains how TiDB, a distributed NewSQL database, combines horizontal scalability with ACID transactions and MySQL compatibility, eliminating the need for manual sharding middleware while supporting both OLTP and OLAP workloads through its HTAP architecture.
This article analyzes four patterns for keeping Elasticsearch synchronized with MySQL — synchronous dual-write, message-queue async, CDC via Canal/binlog, and scheduled reconciliation — explaining why CDC with version-based deduplication and periodic checksums is the production-grade choice for eventual consistency at scale.
This article categorizes Elasticsearch data types into five groups, maps each MySQL type to its ES equivalent with practical notes, explains the critical text vs keyword distinction, covers dynamic mapping traps, and provides interview-ready mnemonics for type selection and concept translation.
This tutorial demonstrates how to use Spring-Smart-DI's @AutowiredProxySPI annotation to dynamically switch between multiple service implementations (e.g., SMS providers) at runtime by changing configuration values, without application restarts, using proxy-based injection that resolves the active implementation on each call.
This article breaks down ElasticSearch's performance advantages across three layers—data structures (inverted index, FST, compressed posting lists), storage (immutable segments, Doc Values), and architecture (shard parallelism, near-real-time writes, multi-level caching)—with concrete examples and interview-focused explanations.
The article breaks down the communication architecture of shared bicycles, covering smart lock hardware, cellular and Bluetooth connectivity, QR‑code unlocking, payment integration, GPS positioning challenges, and the rise of NB‑IoT as the dominant IoT protocol.
The article analyzes how a technical director’s role differs from a frontline manager’s, emphasizing result‑oriented evaluation, a five‑dimensional capability model, and core responsibilities such as strategic topic selection, team building, resource coordination, coaching, and mechanism matching.
