Author

Full-Stack Internet Architecture

Introducing full-stack Internet architecture technologies centered on Java

871

Articles

Likes

1.7k

Views

Comments

Latest from Full-Stack Internet Architecture

100 recent articles max

Full-Stack Internet Architecture

May 18, 2025 · Fundamentals

Strategy Design Pattern in Java: Definition, Structure, Example, and Refactoring

This article explains the behavioral Strategy design pattern, describes its definition and structure, demonstrates a real‑world e‑commerce discount scenario with both a tangled if‑else implementation and a clean refactoring using Java interfaces, concrete strategy classes, a context, and a client, and finally discusses its advantages and drawbacks.

JavaObject-Oriented Programmingdesign-patterns

0 likes · 9 min read

Strategy Design Pattern in Java: Definition, Structure, Example, and Refactoring

Full-Stack Internet Architecture

May 16, 2025 · Backend Development

Diagnosing High CPU Usage in a Java Application with top and jstack

This guide explains how to locate the cause of sudden CPU spikes in a Java program by using the top command to identify the offending process and thread, converting the thread ID to hexadecimal, and analyzing stack traces with jstack to pinpoint the problematic code line.

JavaPerformance debuggingbackend

0 likes · 4 min read

Diagnosing High CPU Usage in a Java Application with top and jstack

Full-Stack Internet Architecture

May 15, 2025 · Databases

Understanding PFAIL and FAIL States in Redis Cluster Node Failure Detection

This article explains the PFAIL (possible fail) and FAIL (failed) states in Redis clusters, describes the state transition process, demonstrates node failure and automatic failover with command‑line examples, and provides practical insights into cluster health monitoring and recovery.

ClusterFAILNode Failure

0 likes · 5 min read

Understanding PFAIL and FAIL States in Redis Cluster Node Failure Detection

Full-Stack Internet Architecture

May 14, 2025 · Backend Development

Handling CORS in Spring Boot and Vue3: Concepts, Code, and Demo

This article explains the concept of Cross‑Origin Resource Sharing (CORS), demonstrates how to identify cross‑origin requests, and provides a complete Spring Boot backend configuration together with Vue3/Axios frontend code to solve CORS issues in a full‑stack web application.

AxiosCORSCross-Origin

0 likes · 9 min read

Handling CORS in Spring Boot and Vue3: Concepts, Code, and Demo

Full-Stack Internet Architecture

May 12, 2025 · Backend Development

Why Using synchronized on a Local Variable Fails to Lock in Java Multithreading

The article demonstrates that synchronizing on a locally created object does not provide proper thread safety, shows the resulting chaotic output, and explains how moving the lock object to a class field resolves the issue, illustrated with Java code and debugging screenshots.

Javadebugginglocking

0 likes · 4 min read

Why Using synchronized on a Local Variable Fails to Lock in Java Multithreading

Full-Stack Internet Architecture

May 10, 2025 · Fundamentals

Strange Behaviors in Java: Integer Caching, String Comparison, Unary Plus, and Unicode Tricks

This article explains several counter‑intuitive Java behaviors—including integer caching with configurable range, string literal pool versus new objects, the unary plus being a sign rather than an operator, and Unicode escape processing that can make commented code execute—providing code examples and practical insights.

integer-cachingprogramming-quirksstring-comparison

0 likes · 5 min read

Strange Behaviors in Java: Integer Caching, String Comparison, Unary Plus, and Unicode Tricks

Full-Stack Internet Architecture

May 8, 2025 · Databases

Manual Slot Migration in Redis Cluster: Step-by-Step Guide

This article explains how to manually migrate a hash slot in a Redis cluster by checking cluster status, setting importing and migrating slots, retrieving keys, using the MIGRATE command, and updating slot assignments across nodes, with detailed command examples and explanations.

CLIClusterRedis

0 likes · 6 min read

Manual Slot Migration in Redis Cluster: Step-by-Step Guide

Full-Stack Internet Architecture

May 7, 2025 · Backend Development

Understanding Java Semaphore: Methods, Usage, and Example Code

This article explains Java's Semaphore concurrency primitive, its core methods, fair vs. non‑fair modes, typical scenarios such as rate limiting and resource pooling, and provides two complete code examples demonstrating thread coordination and download throttling.

ConcurrencyJavaSemaphore

0 likes · 6 min read

Understanding Java Semaphore: Methods, Usage, and Example Code

Full-Stack Internet Architecture

May 6, 2025 · Backend Development

Understanding Java CyclicBarrier with Practical Examples

This article explains Java's CyclicBarrier synchronization tool, compares it with CountDownLatch, demonstrates basic and array‑sum examples with reusable barriers and callback actions, and shows how it can coordinate multiple threads for tasks such as parallel computation and result aggregation.

ConcurrencyCyclicBarrierJava

0 likes · 6 min read

Understanding Java CyclicBarrier with Practical Examples

Full-Stack Internet Architecture

May 5, 2025 · Backend Development

Using CountDownLatch in Java to Synchronize Multiple Threads for a Lucky Card Collection Example

This article explains the Java CountDownLatch utility, demonstrates its countdown synchronization mechanism with a lucky‑card‑collection scenario, provides a complete runnable example, and shows how the main thread waits for all worker threads to finish before proceeding to the lottery step.

ConcurrencyCountDownLatchJava

0 likes · 5 min read

Using CountDownLatch in Java to Synchronize Multiple Threads for a Lucky Card Collection Example