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Code Ape Tech Column

Former Ant Group P8 engineer, pure technologist, sharing full‑stack Java, job interview and career advice through a column. Site: java-family.cn

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Latest from Code Ape Tech Column

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Code Ape Tech Column

Aug 6, 2025 · Backend Development

Implement Role‑Based Data Permissions in MyBatis‑Plus Using Annotations & Interceptors

This article explains how to enforce data‑access restrictions in MyBatis‑Plus by creating a custom @UserDataPermission annotation, building an InnerInterceptor that rewrites SQL queries, handling role‑based scopes, and integrating the interceptor into the MyBatis‑Plus plugin for both basic and advanced use cases.

Data PermissionInterceptorJava

0 likes · 17 min read

Implement Role‑Based Data Permissions in MyBatis‑Plus Using Annotations & Interceptors

Code Ape Tech Column

Aug 5, 2025 · Backend Development

Exploring PowerJob: A Lightweight Distributed Task Scheduler for Java

This article introduces PowerJob, a young yet powerful distributed task scheduling framework, covering its selection reasons, core concepts, high‑availability setup, workflow types, scheduling modes, deployment steps, and detailed code examples for single, broadcast, map, and MapReduce jobs.

Distributed SchedulingJavaMapReduce

0 likes · 15 min read

Exploring PowerJob: A Lightweight Distributed Task Scheduler for Java

Code Ape Tech Column

Jul 25, 2025 · Backend Development

Mastering DDD Four‑Layer Architecture & Microservice SDKs with D3boot

This article explains how to integrate Domain‑Driven Design's four‑layer architecture with microservice SDKs, outlines the structure and purpose of each layer, and introduces the D3boot framework and its modular components for building scalable backend systems efficiently.

DDDFrameworkSpring Boot

0 likes · 10 min read

Mastering DDD Four‑Layer Architecture & Microservice SDKs with D3boot

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.

RedisRedissondistributed lock

0 likes · 31 min read

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

Code Ape Tech Column

Jul 23, 2025 · Backend Development

Simplify Spring Cloud Gateway Authentication with Sa-Token: A Step‑by‑Step Demo

This tutorial shows how to replace heavyweight Spring Security with the lightweight Sa-Token framework by demonstrating token generation, configuration, gateway filtering, role‑based access control, and asynchronous permission fetching for a Spring Cloud microservices architecture.

GatewaySa-TokenSpring Cloud

0 likes · 20 min read

Simplify Spring Cloud Gateway Authentication with Sa-Token: A Step‑by‑Step Demo

Code Ape Tech Column

Jul 22, 2025 · Information Security

Mastering Access Control: From ACL to RBAC and Beyond

This article explains the fundamentals and practical applications of major permission models—including ACL, DAC, MAC, ABAC, and RBAC—detailing their principles, examples, advantages, drawbacks, and how to implement them effectively in real-world systems.

RBACaccess controlauthorization

0 likes · 15 min read

Mastering Access Control: From ACL to RBAC and Beyond

Code Ape Tech Column

Jul 18, 2025 · Backend Development

Building a Flexible Java Rule Engine: Design, Code, and Tips

This article walks through the design and implementation of a Java rule engine, illustrating how to abstract rules, create a reusable executor with AND/OR logic, and demonstrates the full code, while discussing its advantages, drawbacks, and practical usage in real‑world applications.

Code RefactoringDesign PatternsJava

0 likes · 7 min read

Building a Flexible Java Rule Engine: Design, Code, and Tips

Code Ape Tech Column

Jul 17, 2025 · Backend Development

Why You Should Stop Using Lombok’s @Builder and What to Use Instead

This article explains the hidden pitfalls of Lombok’s @Builder annotation, why it often violates the Builder pattern, and presents @Accessors and manual fluent setters as safer, more flexible alternatives for Java backend development.

AccessorsBuilderDesign Patterns

0 likes · 9 min read

Why You Should Stop Using Lombok’s @Builder and What to Use Instead

Code Ape Tech Column

Jul 16, 2025 · Backend Development

7 Proven Spring Boot Performance Optimizations for Faster Apps

This article presents seven practical Spring Boot performance tuning techniques—including asynchronous execution, Tomcat connection tuning, component scanning, switching to Undertow, BufferedWriter usage, DeferredResult handling, and AsyncHandlerInterceptor interception—each illustrated with concise Java code examples to help developers boost application speed and scalability.

JavaSpring Bootasynchronous

0 likes · 9 min read

7 Proven Spring Boot Performance Optimizations for Faster Apps

Code Ape Tech Column

Jul 15, 2025 · Backend Development

Why SpringBoot 3.0 Dropped spring.factories and How to Migrate to Imports

SpringBoot 3.0 removed the traditional spring.factories file to improve startup performance, modularity, and GraalVM native image support, and introduces a new imports‑based registration mechanism with detailed migration steps, code examples, and best‑practice guidance for developers.

GraalVMSpring FactoriesSpringBoot

0 likes · 20 min read

Why SpringBoot 3.0 Dropped spring.factories and How to Migrate to Imports