This article systematically analyzes six root causes of production data inconsistency, details fixes for five core scenarios (inventory, orders, funds, points, cache), reveals four hidden bugs, and provides a three-layer verification system, an 8-step repair SOP, and nine ironclad rules for data high availability.
This tutorial demonstrates how to use the open-source Sanitizer-Lib to automatically sanitize sensitive fields in Spring Boot 3.5 applications via the @Sanitize annotation, covering JSON deserialization, JPA persistence, built-in and custom sanitizers, and programmatic registry usage.
This article introduces an open-source code generator that automatically creates complete Spring Boot CRUD layers—entities, DAOs, MyBatis mappers, services, converters, and controllers—from database schemas or SQL, featuring customizable templates with dynamic parameters and reusable code blocks for team-specific conventions.
This guide details Spring Boot RabbitMQ configuration for reliable message delivery and consumer concurrency, covering publisher confirms, returns, prefetch tuning, acknowledgment modes, channel caching, and a production-ready template with compensation strategies.
The article traces the 10-year history of Go issue #16620, which sought to make sync.Cond selectable, explains the level-vs-edge-triggered conflict, reviews community workarounds, and details bradfitz's new Mutex.LockChan() demo that enables cancellable locking via select.
This guide walks through building a Claude Code Mod from scratch using the Token Weather example, explaining the plugin structure, event hooks, state management, UI rendering, and the three hook patterns (observe, rewrite, answer), while comparing Claude Code's host-centric runtime control plane with DeepSeek Harness's plugin-first architecture.
This article decomposes recovery time into detection, decision, execution, and verification phases, showing how 10M QPS systems reduce recovery from hours to minutes by pre-positioning decisions at design time, bounding data loss via semi-sync replication, automating failover loops with fencing and quorum, and validating RTO through disciplined drills.
This article details a production-grade five-layer architecture for high-concurrency flash sale systems, covering traffic shaping via message queues, multi-level rate limiting, three-tier overselling prevention using Redis atomic operations and database optimistic locking, and solutions for cache penetration, breakdown, and avalanche, plus nine common failure scenarios and a troubleshooting SOP.
This tutorial demonstrates three methods to read YML configuration in SpringBoot — using @Value annotations, the Environment abstraction, and @ConfigurationProperties binding — with complete code examples for each approach.
This article walks through designing a production-grade Redis-backed distributed session system, covering why single-node sessions fail under load balancing, secure token generation with SecureRandom, dual-index Redis storage using Hash and Set with Lua atomic writes, sliding vs absolute expiration, multi-device login limits, and complete login/logout/kick-out implementation with Redisson.
This article dissects why static DNS-based traffic scheduling fails at ten-million-QPS scale and how layered dynamic scheduling — across access, gateway, service, and data layers — combined with unitized routing, automated decision loops, and rigorous drill practices enables precise, reversible, and safe failover.
This article details systematic troubleshooting for 900% CPU spikes in MySQL and Java processes, covering top/jstack diagnostics, show processlist analysis, index optimization, cache integration, and fixing busy-wait loops with BlockingQueue.take(), illustrated through real production case studies.
This article demonstrates how to build a bounded LRU cache in three lines by extending LinkedHashMap with access-order enabled and overriding removeEldestEntry, detailing the internal doubly-linked list mechanics, thread-safety limitations, memory overhead, and when to migrate to Caffeine for advanced features like TTL and high concurrency.
This article analyzes four concurrency control patterns — conditional updates, pessimistic locking, optimistic locking with version numbers, and distributed locks — using inventory deduction, order editing, and third-party push examples. It explains when each pattern applies, how to combine them with idempotency, and provides concrete SQL and Redis implementations.
This article explains how reading compiler-generated assembly helps C++ developers verify optimizations like SIMD vectorization, function inlining, and memory layout efficiency, using tools like perf and Compiler Explorer to replace guesswork with evidence-based performance tuning.
Spring Boot 4.1 introduces InetAddressFilter to block internal network access at the HTTP client level, replacing scattered string checks with a centralized allowlist approach. The article demonstrates configuring RestClient.Builder for external-only access, adding URI validation, disabling auto-redirects, setting timeouts, limiting response size, and enforcing secure patterns via tests and code reviews.
This article compares four Java approaches for calling WebServices — Axis2 code generation, RPC, HttpURLConnection, and HttpClient — detailing pros, cons, code samples, and a real-world namespace mismatch issue when integrating with C-based services.
This article analyzes MyBatis-Plus Pro, a framework that extends MyBatis-Plus by providing a BaseController to auto-generate CRUD APIs, detailing its architecture, reflection-based query wrapper generation, pros/cons, ideal use cases, and best practices for avoiding common pitfalls.
This article details migrating from Spring Cloud/OpenFeign to Apache Dubbo 3 with Spring Boot 3, covering Triple protocol over HTTP/2, binary serialization, service governance (timeouts, retries, load balancing), streaming, observability, and production pitfalls with benchmark comparisons showing 3-5x throughput gains.
Python released synchronized updates for five versions (3.10.22, 3.11.17, 3.12.15, 3.13.16, 3.14.8) with shared security fixes for tar, ZIP, HTTPS, and TLS vulnerabilities, while marking Python 3.10 end-of-life after five years and urging immediate upgrades.
