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vivo Internet Technology
vivo Internet Technology
Dec 3, 2025 · Mobile Development

How Parallel Loading Supercharges H5 Instant SDK: Challenges, Early Designs, and Optimized Solutions

This article explains the parallel loading technique used in the H5 instant SDK to accelerate page startup, details the three resource‑handoff scenarios that cause synchronization challenges, reviews the early simple design and its drawbacks, and presents an optimized producer‑consumer model with fair locks and bridge streams to eliminate wasteful waiting and memory consumption.

H5 instant SDKJava concurrencyParallel Loading
0 likes · 31 min read
How Parallel Loading Supercharges H5 Instant SDK: Challenges, Early Designs, and Optimized Solutions
Code Ape Tech Column
Code Ape Tech Column
Jul 24, 2025 · Backend Development

Mastering Redisson Distributed Locks: Deep Dive into Implementation, Reentrancy, and Fairness

This article provides a comprehensive guide to Redisson's distributed lock implementation, covering its architecture, comparison with Jedis and Lettuce, basic lock creation, Lua scripts for atomic operations, reentrant lock handling, watchdog-based lock renewal, RLock usage, and the design of fair locks using Redis data structures.

distributed-lockfair lockredis
0 likes · 31 min read
Mastering Redisson Distributed Locks: Deep Dive into Implementation, Reentrancy, and Fairness
Sohu Tech Products
Sohu Tech Products
Feb 19, 2025 · Fundamentals

Deep Dive into ReentrantLock: Fair Lock vs Non-Fair Lock Implementation Principles

The article explains Java’s ReentrantLock implementation, contrasting fair locks that queue threads in request order with non‑fair locks that allow immediate acquisition, detailing the internal Sync, FairSync and NonfairSync classes, lock/unlock mechanisms, performance trade‑offs, and guidance on selecting the appropriate lock type.

AQSJUCJava concurrency
0 likes · 19 min read
Deep Dive into ReentrantLock: Fair Lock vs Non-Fair Lock Implementation Principles
Su San Talks Tech
Su San Talks Tech
Dec 16, 2022 · Backend Development

How Redisson Implements Distributed Locks with Redis: A Deep Dive into Lua Scripts and Watchdog

This article explains how Redisson provides Redis‑based distributed locks, covering atomic lock acquisition via Lua scripts, lease time handling, watchdog auto‑extension, re‑entrant and fair locks, read‑write locks, multi‑lock batching, and the RedLock algorithm for high‑availability scenarios.

Lua ScriptWatchdogfair lock
0 likes · 24 min read
How Redisson Implements Distributed Locks with Redis: A Deep Dive into Lua Scripts and Watchdog
Java Architect Essentials
Java Architect Essentials
Nov 30, 2022 · Backend Development

Understanding Redisson Distributed Locks: Architecture, Reentrancy, Fairness, and WatchDog Mechanism

This article explains Redisson's role as a Java in‑memory data grid built on Redis, compares it with Jedis and Lettuce, and details how Redisson implements distributed locks—including simple lock/unlock, Lua‑based reentrant locks, automatic lock renewal (WatchDog), and a fair lock using Redis lists and sorted sets—providing complete code examples and execution flow.

Luadistributed-lockfair lock
0 likes · 31 min read
Understanding Redisson Distributed Locks: Architecture, Reentrancy, Fairness, and WatchDog Mechanism
Sohu Tech Products
Sohu Tech Products
Aug 10, 2022 · Backend Development

Understanding Redisson Distributed Locks: Reentrancy, Fairness, and Watchdog Mechanism

This article explains how Redisson implements distributed locks on Redis, covering basic concepts, differences from Jedis and Lettuce, the Lua scripts for lock acquisition, reentrancy handling, automatic lease renewal via a watchdog, Pub/Sub based unlock notifications, and the design of a fair lock using Redis lists and sorted sets.

Watchdogdistributed-lockfair lock
0 likes · 30 min read
Understanding Redisson Distributed Locks: Reentrancy, Fairness, and Watchdog Mechanism
Sanyou's Java Diary
Sanyou's Java Diary
Jun 12, 2022 · Backend Development

How Zookeeper’s Curator Implements Distributed Locks: A Deep Dive

This article explains how Curator uses Zookeeper's temporary sequential nodes to implement distributed locks, covering lock acquisition, reentrancy, fairness, read‑write semantics, batch locking, and a comparison with Redis‑based locks, while illustrating the process with code snippets and diagrams.

Reentrant Lockcuratorfair lock
0 likes · 14 min read
How Zookeeper’s Curator Implements Distributed Locks: A Deep Dive
Youzan Coder
Youzan Coder
Jul 8, 2020 · Backend Development

Druid Connection Pool Performance Optimization: Fair Lock vs Unfair Lock

The article explains how a Druid 1.1.20 connection pool was throttled to ~10k RPS by fair‑locking in recycle(), and how enabling the unfair lock (setUseUnfairLock(true)) doubled single‑machine TPS, raised CPU usage to near 100 % and boosted cluster throughput by about 70 %.

ArthasDruidJava concurrency
0 likes · 7 min read
Druid Connection Pool Performance Optimization: Fair Lock vs Unfair Lock
Programmer DD
Programmer DD
Jun 19, 2018 · Fundamentals

How Does Java’s ReentrantLock Work? Inside Fair vs. Non‑Fair Locks

This article explains the inner workings of Java's ReentrantLock, covering its API, the difference between fair and non‑fair modes, the lock acquisition and release algorithms, and how it compares to the built‑in synchronized keyword, complete with code examples and detailed analysis.

fair locknonfair-lock
0 likes · 10 min read
How Does Java’s ReentrantLock Work? Inside Fair vs. Non‑Fair Locks