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Practical Application of Test Pyramid in Spring-based Microservice 1. Overview In this tutorial, we’ll understand the popular software-testing model called the test pyramid. We’ll see how it’s relevant in the world of microservices. In the process, we’ll develop a sample application and relevant tests to conform to this model. In… Continue Reading spring-test-pyramid-practical-example
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Best Practices for REST API Error Handling 1. Introduction REST is a stateless architecture in which clients can access and manipulate resources on a server. Generally, REST services utilize HTTP to advertise a set of resources that they manage and provide an API that allows clients to obtain or alter… Continue Reading rest-api-error-handling-best-practices
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Twelve-Factor Methodology in a Spring Boot Microservice 1. Overview In this tutorial, we’ll understand the twelve-factor app methodology. We’ll also understand how to develop a microservice with the help of Spring Boot. In the process, we’ll see how to apply the twelve-factor methodology for developing such a microservice. 2. What… Continue Reading spring-boot-12-factor
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Introduction to OSGi 1. Introduction Several Java mission-critical and middleware applications have some hard technological requirements. Some have to support hot deploy, so as not to disrupt the running services – and others have to be able to work with different versions of the same package for the sake of… Continue Reading osgi
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Java’s Time-Based Releases 1. Introduction In this article, we’ll discuss the new time-based releases of Java and the impact on all types of developers. Changes to the release schedule include updating the feature delivery and support levels for versions of Java. Overall, these changes are distinctly different from the Java… Continue Reading java-time-based-releases
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Microservices with Oracle Helidon 1. Overview Helidon is the new Java microservice framework that has been open sourced recently by Oracle. It was used internally in Oracle projects under the name J4C (Java for Cloud). In this tutorial, we’ll cover the main concepts of the framework and then we’ll move… Continue Reading microservices-oracle-helidon
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Introduction to Bootique 1. Overview Bootique is a very lightweight open-source container-less JVM framework aimed to build next-generation scalable micro-services. It’s built on top of embedded Jetty server and fully supports REST handlers with jax-rs. In this article, we’ll show how to build a simple web application using Bootique. 2.… Continue Reading bootique
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MQTT Client in Java 1. Overview In this tutorial, we’ll see how we can add MQTT messaging in a Java project using the libraries provided by the Eclipse Paho project. 2. MQTT Primer MQTT (MQ Telemetry Transport) is a messaging protocol that was created to address the need for a simple… Continue Reading java-mqtt-client
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Composition, Aggregation, and Association in Java 1. Introduction Objects have relationships between them, both in real life and in programming. Sometimes it’s difficult to understand or implement these relationships. In this tutorial, we’ll focus on Java’s take on three sometimes easily mixed up types of relationships: composition, aggregation, and association.… Continue Reading java-composition-aggregation-association
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Intro to Structurizr 1. Introduction This article is about Structurizr, a tool that provides a programmatic approach to architectural definitions and visualizations based on the C4 Model. Structurizr breaks with traditional drag-and-drop approaches of architectural diagram editors such as UML and allows us to describe our architectural artifacts using the… Continue Reading structurizr
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