Sharing Java developer knowledge, practical articles, and continuous insights into computer engineering.
This article shows how to replace inefficient front‑end polling with a Spring WebFlux server‑sent events (SSE) solution that pushes file‑import progress to the browser in real time, providing complete code for the progress service, import logic, controller, and a vanilla‑JS front‑end example, plus deployment tips.
This article explains why the traditional Spring MVC request‑response model struggles with real‑time scenarios and shows how WebFlux and its Flux API enable server‑side data streaming, concurrent aggregation, and progressive updates for use cases such as infinite scrolling, import progress, and live notifications.
This article demystifies the four core concurrency concepts—synchronous, asynchronous, blocking, and non‑blocking—explaining their meanings, relationships, and practical implications with clear examples and a comparison table, helping developers choose the right model for high‑performance, scalable systems.
This article explains how traditional synchronous JSON responses differ from modern streaming responses, introduces reactive programming concepts, and shows step‑by‑step how to implement non‑blocking, high‑throughput APIs using Spring WebFlux, Mono/Flux, SSE, WebSocket, and related protocols.
This article explains the Bloom filter data structure, its hash‑based design and false‑positive behavior, then demonstrates practical implementations using Java BitSet, Guava, and Redisson, covering initialization, configuration, usage tips, and performance considerations for Redis bitmap storage.
This article explains how to implement a precise sliding‑window rate‑limiting algorithm using Redis Sorted Sets, detailing the problem scenario, the algorithm steps, Lua script implementation, Java integration, and practical extensions for high‑performance backend services.
This article explains why single‑node Redis can become a single point of failure, compares Redis Sentinel and Redis Cluster deployment options, provides step‑by‑step Docker deployment scripts, details Sentinel’s inner workings, demonstrates failover verification, and shares best‑practice recommendations for production environments.
This comprehensive guide walks you through installing Redis on a single server using source compilation and Docker, configuring persistence, memory management, backups, disaster recovery, and systemd service setup, ensuring a production‑ready Redis instance that can handle over 10,000 QPS.
This tutorial walks Java developers through using Redis in Spring Boot projects, covering the essential spring-boot-starter-data-redis dependency, RedisTemplate basics, the underlying RedisConnectionFactory design, custom connection configurations for single‑node and sentinel modes, and seamless integration of the Redisson client for advanced distributed features.
This article examines frequent RocketMQ problems such as duplicate sending, flow‑control throttling, message retries, duplicate consumption, backlog, and loss, and provides practical configuration tweaks, scaling strategies, batch sending, idempotent handling, and retry mechanisms to ensure reliable message delivery.
