Blog
Technical exploration and thoughts · 655 articles
Hive Slowly Changing Dimension Type 2: Order History State Management
Offline data warehouse needs to save order history state at low cost while supporting daily rollback and change analysis.
Rebuilding My Personal Site with Astro: Tech Stack Choices and Migration Notes
Documenting the complete process of migrating wzk.icu from plain HTML to Astro 6: why I chose Astro, content collection setup, Bun gotchas, and SEO infrastructure buildin...
LLM Application Engineering: Key Practices from Demo to Production
Core experience moving LLM applications from prototype to production: context management, error handling, cost control, observability. No basics, just real pitfalls.
Real-time Voice Interaction Pipeline Latency Optimization
When building voice interaction systems, latency is the core experience metric.
Deploying Spring Boot on K8s: 5 Pitfalls I Encountered
Documenting real issues encountered when migrating Spring Boot microservices to Kubernetes: health checks, ConfigMap hot-reload, JVM memory, graceful shutdown...
Spring Cloud Gateway Rate Limiting and Circuit Breaker Practice
Recording the complete process of configuring Spring Cloud Gateway rate limiting (Redis token bucket) and circuit breaker (Resilience4j) in production, including pitfalls...
ESP32 Integration with Home Assistant: Building Temperature/Humidity Sensor with MQTT
Build a temperature and humidity sensor using ESP32 + DHT22, integrate with Home Assistant via MQTT, and achieve automation. Complete steps including troubleshooting guid...
RocketMQ Terminology and Message Model Quick Reference
RocketMQ core terminology and message model quick reference: Producer, Broker, Consumer, Consumer Group, cluster consumption, broadcast consumption, ordered messages...
RocketMQ Java API: Sync/Async Producer
Complete RocketMQ Java API tutorial, sync/async message producer (Producer), pull consumer (PullConsumer) and push consumer (PushConsumer) code examples.
RocketMQ Consumption Modes: Push vs Pull, Long Polling and Offset Management
Deep dive into RocketMQ consumption modes: Push vs Pull comparison, long polling mechanism, consumption backlog handling and Offset management optimization.
RocketMQ 4.5.1 on JDK9+: Startup Troubleshooting Guide
Complete solution for RocketMQ 4.5.1 startup issues on JDK9+, script modifications (GC parameters, CLASSPATH, java.ext.dirs) and environment configuration.
RocketMQ Core Architecture: NameServer/Broker/Producer
RocketMQ (formerly MetaQ) technical evolution history and core architecture deep dive, NameServer, Broker, Producer, Consumer roles and deployment topology.
RocketMQ Core Features: Ordering, Filtering, Transactions and Timed Messages
Deep dive into RocketMQ core features: ordered consumption, Broker-side filtering, transaction messages, scheduled timing messages, consumption retry.
RabbitMQ Message Reliability: Publisher Confirms, mandatory and Persistence
Deep dive into RabbitMQ message reliability, Publisher Confirms mechanism, mandatory Return routing failure callback, message persistence and consumer idempotency practic...
Spring Boot 2.4.1 Integration with RabbitMQ: DirectExchange
Complete Spring Boot integration with RabbitMQ tutorial, DirectExchange configuration, @RabbitListener message listener and Controller HTTP trigger delivery example.
Spring AMQP Integration with RabbitMQ: XML Configuration
Complete Spring AMQP integration with RabbitMQ tutorial, XML configuration to declare queues/exchanges/bindings, RabbitTemplate message sending/receiving and common troub...
Spring AMQP RabbitMQ JavaConfig Annotation Configuration
Spring AMQP JavaConfig annotation configuration to integrate RabbitMQ, ConnectionFactory, RabbitTemplate, Queue Bean configuration and message sending/receiving examples.
RabbitMQ Topic Exchange: Wildcard Matching
Deep dive into RabbitMQ Topic exchange, * and # wildcard rules, RoutingKey format specifications and Java producer/consumer code examples.
RabbitMQ Fanout Pub/Sub Java: Push/Pull Mode, ACK and Binding
RabbitMQ fanout broadcast mode Java tutorial, deep dive into Push vs Pull implementation, applicable scenarios and ACK confirmation mechanism.
RabbitMQ Direct Exchange Routing: RoutingKey Exact Match
RabbitMQ Direct exchange routing mode details, RoutingKey exact match rules, queue multi-binding for log-level consumption and Java code examples.