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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 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.

AlertingGrafanaMetrics

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.

ExceptionHandlingExecutorServiceFuture

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.

authenticationjwtsession management

0 likes · 15 min read

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

Code Ape Tech Column

Sep 8, 2025 · Backend Development

How to Implement Data Desensitization with YAML and Java Maps

This article explains a step‑by‑step approach to mask sensitive fields in API responses by defining desensitization rules in YAML, loading them into Java Maps, and applying recursive logic to traverse nested structures and replace data using regular expressions.

Data DesensitizationLoggingYAML

0 likes · 22 min read

How to Implement Data Desensitization with YAML and Java Maps

Code Ape Tech Column

Sep 5, 2025 · Cloud Native

One-Click Deploy Spring Cloud Microservice via Jenkins, Docker & K8s

This guide walks you through automating the full lifecycle of a Spring Cloud microservice—from pushing code to Git, configuring Jenkins pipelines with SSH keys, building with Maven, packaging into Docker images, pushing to a registry, and finally deploying and updating the service on Kubernetes—all with step‑by‑step commands and scripts.

CI/CDDockerJenkins

0 likes · 12 min read

One-Click Deploy Spring Cloud Microservice via Jenkins, Docker & K8s

Code Ape Tech Column

Sep 4, 2025 · Backend Development

10 Essential Microservice Best Practices to Boost Efficiency and Security

This article outlines ten practical microservice best practices—including single responsibility, cross‑functional teams, proper tooling, asynchronous communication, DevSecOps, independent data stores, isolated deployment, orchestration, and monitoring—to help developers build scalable, maintainable, and secure backend systems.

Cloud NativeMicroservicesbackend-architecture

0 likes · 13 min read

10 Essential Microservice Best Practices to Boost Efficiency and Security

Code Ape Tech Column

Sep 3, 2025 · Backend Development

Building a Flexible Contract Signing Workflow with Chain of Responsibility

This article explains how to design a contract‑signing workflow in Java using the Chain of Responsibility and Strategy patterns, covering the processing steps, project structure, annotation‑driven bean injection, and complete code examples for each component.

AnnotationsChain of ResponsibilityDependency Injection

0 likes · 16 min read

Building a Flexible Contract Signing Workflow with Chain of Responsibility

Code Ape Tech Column

Sep 2, 2025 · Operations

Avoid QPS Miscalculations: 5 Proven Methods to Accurately Measure Traffic

This article explains five practical ways to count QPS—from gateway and application instrumentation to monitoring tools, log analysis, and database metrics—while highlighting common pitfalls such as health‑check filtering, thread‑safety, and multi‑node aggregation, helping engineers make informed scaling decisions.

ELKJavaPrometheus

0 likes · 16 min read

Avoid QPS Miscalculations: 5 Proven Methods to Accurately Measure Traffic

Code Ape Tech Column

Sep 1, 2025 · Backend Development

How to Visualize SQL Call Trees in SpringBoot with MyBatis and D3.js

This article demonstrates how to build a SpringBoot‑based SQL call‑tree visualization system using a MyBatis interceptor, D3.js front‑end, and thread‑local context to capture, organize, display and analyze SQL execution hierarchies, performance metrics and slow‑SQL detection for complex business applications.

D3.jsMyBatisSQL Visualization

0 likes · 20 min read

How to Visualize SQL Call Trees in SpringBoot with MyBatis and D3.js