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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

Sep 22, 2025 · Backend Development

How to Build an Elegant Java TimeTracker with AutoCloseable and Lambdas

This article explains how to design a lightweight, flexible Java TimeTracker utility that leverages AutoCloseable, try‑with‑resources, functional interfaces and lambda expressions to simplify performance monitoring, support automatic exception handling, and provide extensible features for real‑world backend development.

Lambdaautocloseableperformance monitoring

0 likes · 13 min read

How to Build an Elegant Java TimeTracker with AutoCloseable and Lambdas

Code Ape Tech Column

Sep 20, 2025 · Databases

What New SQL Features Did SQLite Add in 2018? A Deep Dive

This article explores SQLite's 2018 enhancements—including boolean literals, window functions, FILTER clauses, upsert syntax, and column renaming—detailing how each feature works, its syntax, and practical code examples, while also clarifying limitations compared to other major database systems.

Boolean LiteralsDatabase FeaturesFILTER clause

0 likes · 10 min read

What New SQL Features Did SQLite Add in 2018? A Deep Dive

Code Ape Tech Column

Sep 19, 2025 · Backend Development

Sentinel Deep Dive: Flow Control, Circuit Breaking & Rate Limiting

This comprehensive tutorial introduces Alibaba Sentinel, explaining its core concepts, installation, configuration of flow control, degradation, hotspot parameters, system adaptive limits, black‑white lists, persistence with Nacos, cluster flow control, and advanced customization techniques such as custom block handlers and fallback strategies for resilient microservice architectures.

Circuit BreakingFlow ControlMicroservices

0 likes · 39 min read

Sentinel Deep Dive: Flow Control, Circuit Breaking & Rate Limiting

Code Ape Tech Column

Sep 18, 2025 · Backend Development

Master Traffic Coloring & Gray Release with Spring Cloud Gateway

This article explains how to use Spring Cloud Gateway for traffic coloring and gray release, enabling you to tag requests, route VIP or test traffic to new service versions gradually, and ensure safe, controlled rollouts in production environments.

Gray ReleaseMicroservicesSpring Cloud Gateway

0 likes · 14 min read

Master Traffic Coloring & Gray Release with Spring Cloud Gateway

Code Ape Tech Column

Sep 17, 2025 · Backend Development

8 Powerful Ways to Implement Asynchronous Processing in Java

Explore eight practical techniques for achieving asynchronous execution in Java—from low‑level threads and Futures to Spring’s @Async, ApplicationEvent, message queues, and Guava ListenableFuture—complete with code samples, performance insights, and best‑practice recommendations for building responsive backend services.

AsynchronousFutureJava

0 likes · 13 min read

8 Powerful Ways to Implement Asynchronous Processing in Java

Code Ape Tech Column

Sep 15, 2025 · Backend Development

Unlock Ultra‑Fast Messaging with Disruptor: A Hands‑On Java Guide

This article introduces the high‑performance Disruptor library, explains its core concepts such as Ring Buffer, Sequence, and Wait Strategy, and provides a step‑by‑step Java demo—including Maven setup, event model, producer, consumer, and test—showcasing how to build a lock‑free in‑memory message queue.

Concurrent ProgrammingDisruptorJava

0 likes · 11 min read

Unlock Ultra‑Fast Messaging with Disruptor: A Hands‑On Java Guide

Code Ape Tech Column

Sep 12, 2025 · Operations

Master Grafana & Prometheus: Step‑by‑Step Guide to Build a Full‑Featured Monitoring System

This comprehensive tutorial walks you through installing and configuring Grafana, Prometheus, and related exporters, setting up dashboards, enabling email alerts, and extending monitoring to MySQL, RabbitMQ, Redis, and TiDB, all while providing clear code snippets and practical tips for a robust observability stack.

DevOpsGrafanaMetrics

0 likes · 24 min read

Master Grafana & Prometheus: Step‑by‑Step Guide to Build a Full‑Featured Monitoring System

Code Ape Tech Column

Sep 11, 2025 · Backend Development

Instantly Debug SpringBoot Apps in Production Without Restart

This article introduces a SpringBoot online debugging injector that lets backend developers add, adjust, and remove fine‑grained debug rules at runtime, eliminating midnight alarm calls, costly redeployments, and performance bottlenecks while keeping production services safe and uninterrupted.

ByteBuddyInstrumentationJava Agent

0 likes · 18 min read

Instantly Debug SpringBoot Apps in Production Without Restart

Code Ape Tech Column

Sep 10, 2025 · Backend Development

How to Capture Exceptions from Java ThreadPoolExecutor: submit vs execute

This article explains why tasks submitted with ExecutorService.submit silently swallow exceptions while execute prints them, and demonstrates three practical ways—try‑catch, Thread.setDefaultUncaughtExceptionHandler, and overriding afterExecute—to reliably retrieve exception information from a Java thread pool.

ExecutorServiceFutureJava

0 likes · 14 min read

How to Capture Exceptions from Java ThreadPoolExecutor: submit vs execute

Code Ape Tech Column

Sep 9, 2025 · Information Security

Why Using JWT for Sessions Is a Bad Idea and Safer Alternatives

This article explains why JSON Web Tokens are unsuitable for session storage, outlines the security risks and practical drawbacks, and shows the scenarios where JWTs are appropriate, helping developers make informed authentication choices.

AuthenticationSession Managementjwt

0 likes · 15 min read

Why Using JWT for Sessions Is a Bad Idea and Safer Alternatives