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Cognitive Technology Team

Jul 16, 2025 · Databases

Mastering Dynamic Multi‑DataSource Management in Spring Boot: A Deep Dive

Dynamic‑datasource 4.3.1 offers a powerful AOP‑based, annotation‑driven solution for seamless multi‑database routing, read‑write separation, and load‑balancing in Spring Boot applications, while addressing common pitfalls such as transaction boundaries, connection‑pool configuration, health‑check failures, and version compatibility.

Health CheckLoad BalancingMulti-DataSource

0 likes · 18 min read

Mastering Dynamic Multi‑DataSource Management in Spring Boot: A Deep Dive

Cognitive Technology Team

Jul 15, 2025 · Backend Development

Mastering Backpressure in Spring WebFlux: Strategies for Slow Clients

This article explains how backpressure works in Spring WebFlux, outlines the built‑in Reactor strategies, provides practical code examples for handling slow consumers, and offers guidance on choosing and monitoring the right approach to keep reactive applications resilient under load.

JavaReactorserver-sent-events

0 likes · 14 min read

Mastering Backpressure in Spring WebFlux: Strategies for Slow Clients

Cognitive Technology Team

Jul 15, 2025 · Backend Development

Mastering Backpressure in Spring WebFlux: Strategies and Code Examples

This article explains the concept of backpressure, its implementation in Spring WebFlux, and presents practical strategies—including buffering, dropping, latest, and error handling—along with code samples to help developers manage data flow efficiently in reactive backend applications.

FluxJavabackend

0 likes · 11 min read

Mastering Backpressure in Spring WebFlux: Strategies and Code Examples

Cognitive Technology Team

Jul 13, 2025 · Backend Development

How to Configure NGINX for Precise CORS Control and Secure Cross‑Origin Requests

This tutorial explains the fundamentals of same‑origin policy, demonstrates how to allow all origins or restrict methods in NGINX, shows how to handle pre‑flight OPTIONS requests, and provides complete configuration examples for secure CORS header management.

CORSNginxsecurity

0 likes · 10 min read

How to Configure NGINX for Precise CORS Control and Secure Cross‑Origin Requests

Cognitive Technology Team

Jul 13, 2025 · Backend Development

How to Eliminate Nginx’s Thundering Herd Problem: Accept & Epoll Solutions

This article explains the thundering herd issue in Nginx’s multi‑process model, detailing both accept‑ and epoll‑related herd problems, their causes, and practical mitigation techniques such as kernel‑level improvements, Nginx’s accept_mutex, dynamic load balancing, and the SO_REUSEPORT feature.

Load BalancingNginxSO_REUSEPORT

0 likes · 11 min read

How to Eliminate Nginx’s Thundering Herd Problem: Accept & Epoll Solutions

Cognitive Technology Team

Jul 12, 2025 · Backend Development

Mastering Apache HttpClient Connection Pool: Limits, Pitfalls, and Optimization

This article explores Apache HttpClient’s connection pool mechanism, detailing key parameters such as maxConnTotal, maxConnPerRoute, and timeToLive, explains how connections are allocated and reused, highlights common misconfigurations, and provides best‑practice tuning recommendations for high‑concurrency Java applications.

Apache HttpClientConcurrencyConnection Pool

0 likes · 9 min read

Mastering Apache HttpClient Connection Pool: Limits, Pitfalls, and Optimization

Cognitive Technology Team

Jul 12, 2025 · Operations

How to Diagnose and Fix High CPU, Memory, and Disk I/O Issues on Linux VPS

This guide explains the most common Linux VPS performance problems—CPU overload, memory exhaustion, and disk I/O bottlenecks—and provides step‑by‑step commands and optimization techniques to monitor, troubleshoot, and resolve them efficiently.

PerformanceTroubleshootingVPS

0 likes · 14 min read

How to Diagnose and Fix High CPU, Memory, and Disk I/O Issues on Linux VPS

Cognitive Technology Team

Jul 12, 2025 · Backend Development

Java 25 Unveiled: Key Language, API, and Performance Enhancements

Java 25, the upcoming LTS release slated for September 2025, introduces a suite of language and compiler upgrades such as pattern matching for primitive types, module import declarations, flexible constructor bodies, compact source files, plus new APIs like ScopedValue, Structured Concurrency, Vector, PEM handling, and numerous performance and platform improvements, all illustrated with practical code examples.

API EnhancementsJDKJava

0 likes · 19 min read

Java 25 Unveiled: Key Language, API, and Performance Enhancements

Cognitive Technology Team

Jul 8, 2025 · Backend Development

How to Dynamically Autowire Beans in Spring: Two Practical Approaches

This tutorial explains why and how to dynamically change Spring bean implementations at runtime, presenting a real-world region‑service example and demonstrating two solutions—using BeanFactory and injecting a map of implementations—for flexible backend development.

Dynamic AutowiringSpringbeanfactory

0 likes · 5 min read

How to Dynamically Autowire Beans in Spring: Two Practical Approaches

Cognitive Technology Team

Jul 8, 2025 · Backend Development

How to Register Spring Beans at Runtime: A Step‑by‑Step Guide

This tutorial explains multiple ways to register Spring beans dynamically at runtime, covering BeanDefinitionRegistryPostProcessor implementation, programmatic bean creation with BeanDefinitionBuilder, ApplicationContextInitializer usage, BeanFactory registration, and direct BeanDefinitionRegistry manipulation, complete with code examples and configuration details.

Javabackendbean

0 likes · 7 min read

How to Register Spring Beans at Runtime: A Step‑by‑Step Guide