Java Resources

Distributed Rate Limiting in Java: A Deep Dive into Bucket4j + PostgreSQL

Bucket4j for Java enables distributed rate limiting with PostgreSQL, ensuring consistency via database locks. There is, as it works.

June 24, 2025

by Arkadii Osheev

· 3,633 Views · 6 Likes

From Java 8 to Java 21: How the Evolution Changed My Developer Workflow

Learn how upgrading from Java 8 to Java 21 transformed my workflow with features like records, virtual threads, and text blocks. A must-read for Java developers.

June 23, 2025

by Akhil Sabu

· 12,620 Views · 12 Likes

How to Marry MDC With Spring Integration

This article explores the challenges of Mapped Diagnostic Context propagation in Spring integration to ensure the correct context persists across workflows.

June 20, 2025

by Vsevolod Vasilyev

· 3,385 Views · 8 Likes

Top Trends for Data Streaming With Apache Kafka and Flink

Explore how Apache Kafka and Apache Flink are transforming data streaming, powering real-time analytics, and shaping cloud and future-ready business systems.

June 18, 2025

by Kai Wähner

CORE

· 2,471 Views · 1 Like

Effective Exception Handling in Java and Spring Boot Applications

Centralize your error handling using @ControllerAdvice and @ExceptionHandler to ensure consistent, maintainable exception management across your Spring Boot application.

June 17, 2025

by Arunkumar Kallyodan

· 9,689 Views · 9 Likes

Kung Fu Commands: Shifu Teaches Po the Command Pattern with Java Functional Interfaces

Po skips training (again) but learns the Command Pattern from Shifu instead. Part of our "Design Patterns with Kung Fu" series. No dumplings were harmed.

June 17, 2025

by Shaamik Mitraa

· 1,983 Views · 1 Like

Driving Streaming Intelligence On-Premises: Real-Time ML With Apache Kafka and Flink

This article explores how to design, build, and deploy a predictive ML model using Flink and Kafka in an on-premises environment to power real-time analytics.

June 17, 2025

by Gautam Goswami

CORE

· 1,704 Views · 6 Likes

How to Use Testcontainers With ScyllaDB

Learn how to use Testcontainers to create lightweight, throwaway instances of ScyllaDB for testing with hands-on example.

June 16, 2025

by Eduard Knezovic

· 1,577 Views · 1 Like

Code of Shadows: Master Shifu and Po Use Functional Java to Solve the Decorator Pattern Mystery

A humorous and educational comparison of the OOP and functional approaches to the Decorator pattern in Java, featuring Po and Master Shifu.

June 16, 2025

by Shaamik Mitraa

· 3,255 Views · 4 Likes

Memory Leak Due to Uncleared ThreadLocal Variables

ThreadLocal variables in Java, if not cleared, can accumulate in memory, causing an OutOfMemoryError. Learn how to clear them after use to avoid memory leaks.

June 13, 2025

by Ram Lakshmanan

CORE

· 3,917 Views · 2 Likes

Beyond Java Streams: Exploring Alternative Functional Programming Approaches in Java

Java Streams are great, but libraries like Vavr, Reactor, and RxJava unlock deeper functional power, async flow, pattern matching, trampolines, and cleaner composition.

June 12, 2025

by Rama Krishna Prasad Bodapati

· 4,351 Views · 5 Likes

Java Enterprise Matters: Why It All Comes Back to Jakarta EE

Jakarta EE powers enterprise Java—Spring, Quarkus, Helidon all rely on it. Learn why it's foundational, evolving fast, and why every Java developer should care.

June 11, 2025

by Otavio Santana

CORE

· 3,249 Views · 5 Likes

Kung Fu Code: Master Shifu Teaches Strategy Pattern to Po – The Functional Way

Master Shifu guides Po from bloated Java classes to cleaner functional code using the Strategy Pattern—showing that good code is about how you write it.

June 9, 2025

by Shaamik Mitraa

· 2,429 Views · 5 Likes

How to Create a Custom React Component in Vaadin Flow

Learn how to integrate custom React components (Plotly charts) into Vaadin Flow apps. Java backend sends data to a React frontend. React uses hooks to communicate.

June 6, 2025

by Mark Andreev

· 2,912 Views

How to Identify the Underlying Causes of Connection Timeout Errors for MongoDB With Java

Understand common causes of connection timeout error when using MongoDB with Java and learn how to tackle them by analyzing logs and tuning connection settings.

June 6, 2025

by Rajesh Nair

· 4,479 Views · 5 Likes

Supercharge Your Java Apps With AI: A Practical Tutorial

A practical, code-rich tutorial showing Java developers AI integration via TensorFlow and OpenAI with examples like NLP, chatbots, and image processing.

June 4, 2025

by Alok Tibrewala

· 3,597 Views · 3 Likes

Beyond Bytecode: Exploring the Relationship Between JVM, JIT, and Performance

JIT compilation boosts Java performance by converting bytecode to native code at runtime, optimizing execution while balancing startup speed.

June 3, 2025

by Ammar Husain

CORE

· 3,272 Views · 6 Likes

Monoliths, REST, and Spring Boot Sidecars: A Real Modernization Playbook

Modernization isn’t a rewrite, it’s a dance. Wrap REST around SOAP, sneak in AWS, and layer smartly. Change only what matters. Legacy can live modern.

May 29, 2025

by Chandra Sekhar Kondaveeti

· 5,804 Views · 2 Likes

Introducing Graph Concepts in Java With Eclipse JNoSQL, Part 3: Understanding Janus

Explore JanusGraph with Java using Eclipse JNoSQL 1.1.8. Model entities, traverse with Gremlin, and query with Jakarta Data — scalable graph power with clean Java APIs.

May 29, 2025

by Otavio Santana

CORE

· 4,050 Views · 2 Likes

Introducing Graph Concepts in Java With Eclipse JNoSQL, Part 2: Understanding Neo4j

Learn how to integrate Neo4j into Java apps using Eclipse JNoSQL 1.1.8 — model entities, define relationships, and query graphs with Cypher and Jakarta Data.

May 28, 2025

by Otavio Santana

CORE

· 4,687 Views · 1 Like

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