Posted inProgramming
Clean Up Your Java Code: A Practical Guide to Vavr
Tired of messy try-catch blocks? Learn how to use Vavr to write cleaner, more resilient Java code using functional patterns like Try, Option, and Either.
Posted inSecurity
Beyond the Perimeter: Defeating Insecure Deserialization in Java, PHP, and Python
Insecure deserialization is a silent killer in modern web apps. Explore how gadget chains lead to RCE in Java, PHP, and Python, and learn production-grade strategies to secure your data.
Posted inProgramming
Building a Professional API Gateway with Spring Cloud Gateway: A Production-Ready Guide
Learn how to build a production-ready API Gateway using Spring Cloud Gateway. This guide covers dynamic routing via Service Discovery, distributed rate limiting with Redis, and implementing circuit breakers with Resilience4j for high-performance microservices.
Posted inProgramming
Spring AOP Tutorial: Separate Logging and Security Logic from Business Code in Java
Spring AOP lets you remove logging, security, and other cross-cutting concerns from your service classes entirely — writing them once as aspects that Spring weaves in automatically. This tutorial covers the core concepts, five advice types, and a practical custom-annotation security pattern with real Java code examples.
Posted inProgramming
Beyond the Basics: Hardening Microservices with Resilience4j and Spring Boot
Don't let one failing microservice take down your entire system. Learn how to implement Resilience4j Circuit Breakers, Retries, and Rate Limiters with production-ready configurations.
Posted inProgramming
Modern Java with Records, Sealed Classes, and Pattern Matching: Write Cleaner, Safer Code in Java 17–21
Java Records, Sealed Classes, and Pattern Matching — stable since Java 17 and fully mature in Java 21 — cut boilerplate dramatically, make type hierarchies exhaustive by design, and push invalid states to compile-time errors instead of runtime surprises. This guide walks through all three with practical examples: from a one-line Point record to sealed event hierarchies and record deconstruction in switch expressions.
Posted inProgramming
Building a Production-Ready REST API with Spring Boot, Spring Security, JPA, and Docker
A step-by-step guide to building a secure, production-ready REST API with Spring Boot 3, Spring Security, Spring Data JPA, and Docker. Covers project setup, entity modeling, authentication configuration, Dockerization with multi-stage builds, and production monitoring with Actuator — drawn from real migration experience.
Posted inLinux
Stop the Symlink Madness: Managing Java and Python Versions with update-alternatives
Ditch the manual symlinking. This guide shows you how to use Linux update-alternatives to master version management for Java, Python, and GCC in production.
Posted inProgramming
Regex Tutorial: A Practical Guide with Examples and Online Tester
Navigate Regular Expressions with confidence. This practical guide covers core concepts, syntax, and real-world examples to solve common text processing problems efficiently.