Java Resources

Web App Load Testing Using Maven Plugins for Apache JMeter, and Analyzing the Results

How to perform a complete load-testing with Java Maven and processing the performance metrics through a dedicated POM file

December 2, 2025

by Vincent DABURON

· 7,114 Views · 3 Likes

JDK 17 Memory Bloat in Containers: A Post-Mortem

Upgrading from JDK 8 to JDK 17 spiked container memory from ~50% to 100% due to excessive JVM threads, glibc malloc arenas, and G1GC native allocation.

December 2, 2025

by Saumya Tyagi

· 12,313 Views · 11 Likes

From Repetition to Reusability: How Maven Archetypes Save Time

Teaching teams to rely on Maven archetypes means less setup, fewer errors, and more time spent on solving real problems.

November 28, 2025

by Soham Sengupta

· 3,963 Views · 3 Likes

How to Test POST Requests With REST Assured Java for API Testing: Part I

Test POST requests with REST Assured for API testing with this step-by-step guide for software test automation engineers, designed to build reliable API tests.

November 25, 2025

by Faisal Khatri

CORE

· 4,474 Views

Building a Retrieval-Augmented Generation (RAG) System in Java With Spring AI, Vertex AI, and BigQuery

Build a Java RAG application using Spring Boot, Vertex AI embeddings, BigQuery vector search, and a web UI for interactive PDF-based question answering.

November 24, 2025

by Mohammed Fazalullah Qudrath

· 6,781 Views · 8 Likes

Architectural Evidence in Enterprise Java: Making Domain-Driven Design Visible

Use CDI stereotypes + JMolecules annotations to make DDD architecture explicit, enforceable, and testable. This preserves design intent as your Java system evolves.

November 24, 2025

by Otavio Santana

CORE

· 6,017 Views · 4 Likes

Building a Containerized Quarkus API on AWS ECS/Fargate With CDK

Build production-ready Quarkus API on AWS ECS with CDK Infrastructure as Code. Includes database integration, caching, and comprehensive testing.

November 18, 2025

by Nicolas Duminil

CORE

· 4,878 Views

From Symptoms to Solutions: Troubleshooting Java Memory Leaks and OutOfMemoryError

Learn to detect, isolate, and fix Java memory leaks and OutOfMemoryError with practical tips, tools, and heap dump analysis for better performance.

November 18, 2025

by Ram Lakshmanan

CORE

· 3,935 Views · 1 Like

When Memory Overflows: Too Many ApplicationContexts in Spring Integration Tests

Spring Boot makes integration testing incredibly convenient: you have the entire application up and running in your test. But sometimes you can see memory usage spikes.

November 13, 2025

by Constantin Kwiatkowski

· 4,416 Views · 7 Likes

How to Map PostgreSQL JSON Data Types in Java Using asentinel-orm

Convert between custom Java types and database types using the Spring framework's ConversionService, particularly for JSON entity attributes.

November 12, 2025

by Horatiu Dan

CORE

· 2,784 Views · 5 Likes

Debugging Performance Regressions in High-Scale Java Web Services: A Systematic Approach

High-scale Java systems degrade quietly, minor regressions in GC, logging, or threads can cascade into latency and revenue loss.

November 11, 2025

by Karthik Puthraya

· 4,076 Views · 1 Like

Gatherers in Java: What They Are and Why They Matter

With Stream API, developers could only customize terminal operations using Collector. Stream Gatherers allow developers to define custom intermediate operations.

November 11, 2025

by Ammar Husain

CORE

· 5,007 Views · 8 Likes

The JVM Pause That Wasn't: A War Story

A high-throughput Java service was stalling. The culprit? Stop-the-World GC pauses were blocked by synchronous log writes to a busy disk.

November 6, 2025

by Nataraj Mocherla

· 3,633 Views · 11 Likes

JPlus: A Modern Java Superset Language

JPlus is a modern Java superset that introduces null-safety and boilerplate code-generation syntax while preserving Java compatibility.

November 5, 2025

by Cheol Jeon

· 3,238 Views · 2 Likes

Top Takeaways From Devoxx Belgium 2025

In October 2025, Devoxx Belgium showcased its 22nd edition, emphasizing Java and AI advancements. Sessions covered were AI workflows, architecture decisions, and more.

November 4, 2025

by Gunter Rotsaert

CORE

· 1,607 Views · 3 Likes

Building Reactive Microservices With Spring WebFlux on Kubernetes

Spring WebFlux on Kubernetes delivers high-throughput, low-latency I/O with fewer resources using reactive IO, Resilience4j, and metrics-based autoscaling.

October 30, 2025

by Mikhail Povolotskii

· 4,390 Views · 1 Like

Writing (Slightly) Cleaner Code With Collections and Optionals

See how utility methods provided by Kilo's Collections and Optionals classes can help you write more readable and maintainable Java code.

October 27, 2025

by Greg Brown

· 2,712 Views · 1 Like

Set Up Spring Data Elasticsearch With Basic Authentication

Guide to configure SSL communication with Elasticsearch via Spring Data Elasticsearch. Additionally, the communication is secured with BASIC authentication.

October 27, 2025

by Arnošt Havelka

CORE

· 2,103 Views