An introduction to the Reactive Programming Paradigm — This is the first part of a series on Reactive programming with Spring WebFlux. Part 2 : An introduction to Spring WebFlux features If you are clueless about what reactive programming is, then you are in the right place. In part 1, we will see the basics of the reactive…

A step-by-step guide to build your first AI Chatbot — IBM Watson is a powerful platform where software developers and non-technical users can co-create AI solutions. Its easy-to-use interface allows you to quickly create an AI model, from simple chatbots to complex enterprise solutions. In this article, we will explore how to create, train and integrate your first Cognitive Virtual…

The hexagonal architecture is replacing the layered style, and here’s why — The Hexagonal Architecture is an architectural pattern for designing software applications. Its popularity has increased in recent years as it is an alternative to a traditional layered architecture. In this article, I explain why hexagonal architecture is replacing layered architecture. What is the problem with layered architecture?

An introduction to service discovery and registration — Modern distributed systems assign network locations dynamically, so you don’t know what IP address or port each service instance has. Consequently, client applications need a mechanism to discover the IP address and port of the services they are using. As we explore in this article, service discovery tools like Netflix…

A guide to handle partial failure in microservices — A distributed system, which comprises many services interacting to achieve business goals, is prone to failures in the chain of service dependencies. Suppose service A calls service B, which calls service C, but C does not respond. Service C may be down, or overloaded, and take a long time to…

A practical guide to gRPC Remote Procedure Call in Java — gRPC Remote Procedure Call is a binary message-based protocol for writing cross-language applications. As part of this tutorial, we will see how the gRPC framework enables a more efficient communication across distributed systems. Understanding gRPC Client-Server Model Similar to REST APIs, gRPC APIs define one or more services and request/response messages.

Spring AOP illustrated — Aspect Oriented Programming (AOP) is a powerful tool that enables a clean modularization of “crosscutting” concerns of enterprise applications; such as error handling, transaction management, monitoring and logging, just to name a few. As part of this tutorial, we’ll explore Spring AOP and see how it works. Aspect-Oriented Programming Illustrated AOP terminology can…

An introduction to the Javadoc Tool — The Javadoc Tool simplifies the documentation process in Java, allowing developers to document their code seamlessly as they write it. This article delves into 7 best practices for generating API documentation from Java source files using Javadoc. 1. Follow the Comment Specification for Your Java Version The tool uses a JavaDoc doclet to analyze the internal structure of the…

Clean your Java code and make it a long-term asset — SonarQube is an open-source platform for continuous code quality inspection. This tool provides a detailed analysis of bugs, code smells, vulnerabilities, and duplications in source code. Static code analysis rules provided by Sonar can help you identify bugs, bad practices, and vulnerabilities. …