Mastering RocketMQ Timed Messages: Precise, Scalable Scheduling for Distributed Systems

This article explains the concept, scenarios, advantages, and implementation details of Apache RocketMQ's timed/delay messages, including the TimerWheel algorithm, service workflow, a financial payment‑timeout use case, and practical steps for creating and consuming timed messages.

Backend DevelopmentDistributed SchedulingMessage Queue

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Mastering RocketMQ Timed Messages: Precise, Scalable Scheduling for Distributed Systems

Top Architect

Dec 20, 2020 · Backend Development

Deep Dive into Caffeine Cache: High‑Performance Design, W‑TinyLFU Algorithm, and Implementation Details

This article explains Caffeine, a high‑performance Java local cache, covering its design improvements over Guava Cache, the W‑TinyLFU eviction algorithm, asynchronous read/write buffers, timer‑wheel expiration, and detailed source code analysis with examples.

CacheCaffeineJava

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Deep Dive into Caffeine Cache: High‑Performance Design, W‑TinyLFU Algorithm, and Implementation Details

Architecture Digest

Dec 17, 2020 · Backend Development

Deep Dive into Caffeine Cache: High‑Performance Design and Source‑Code Analysis

This article explains Caffeine, a high‑performance Java local cache that supersedes Guava Cache, by detailing its design principles such as the W‑TinyLFU eviction algorithm, FrequencySketch implementation, adaptive window sizing, asynchronous read/write buffers, and timer‑wheel expiration, accompanied by extensive code examples.

CacheCaffeineFrequencySketch

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Deep Dive into Caffeine Cache: High‑Performance Design and Source‑Code Analysis