A brief introduction to Swarm Learning (SL) — Estimated figures show that one autonomous vehicle can generate terabytes of data per day. The data is used to train the machine learning model so the car can make timely decisions on the road. Hospitals apply machine learning to identify diseases faster. These applications are critical, especially for highly contagious…

This tutorial provides an introduction to regions, availability domains and fault domains in Oracle Cloud Infrastructure (OCI) — As of this writing, Oracle Cloud Infrastructure (OCI) has 40 regions spread all over the globe. On Sept. 12, 2022, Oracle released the 40th data centre in Madrid, Spain. It’s the only region in Spain. The region identifier and key are eu-madrid-1 and MAD respectively. …

Introduction to Dropwizard (alternative to Spring Boot). You’ll learn core concepts and how to implement a simple web service and deploy it with Docker — by Vinicius Monteiro Dropwizard is a lightweight and high-performance open-source Java framework/library. As the official home page describes, “Dropwizard straddles the line between being a library and a framework”. Dropwizard applications are built as fat JARs with Jetty as the embedded web server. …

What factors contribute to adaptation of Agile practices — Agile is the primary choice for many organisations in the process of building software. It generates gains in productivity and delivers the software faster to market. These benefits are a consequence of Agile’s process being more flexible, more adaptive to changes and allowing rapid feedback. …

Component, ComponentScan, Service, Autowired, Transactional, Repository and Controller — Spring is a framework that simplifies the development of enterprise Java applications. The framework makes working with transactions, persistence, event handling, web, and other applications/components easier. By using Spring, the developer can focus more on the application logic. There are several annotations you can use when working with Spring. In…

Stream API is an elegant and concise alternative when converting arrays to Collection and Map — Introduced in Java 8, Stream API is used to process a sequence of elements. It can replace for loops, filter out elements from a List , convert from one data structure to another, and more. Stream API along with lambda expression or method references makes the code more concise. Less…

A brief introduction to the Proxy design pattern and how Spring makes use of it — Proxy is a structural design pattern used by frameworks such as Spring. The Proxy design pattern controls and/or adds behaviour to another class. For instance, when you use the Transactional annotation in Spring, under the hood, Spring is creating a “proxy”. Inside the “proxy”, Spring adds logic (e.g. opens the…

I address the following cases: primitives, changing or not the original object, and the behaviour of immutable objects — Sometimes, it can be confusing to understand that Java is passed-by-value, and not pass-by-reference. Confusion arises, especially when the parameter is an object reference. Even if you know how it works, you can still make mistakes on challengers’ types of questions. …

Introduction to and motivation for using nested classes in Java — Nested classes, as the name suggests, are classes defined inside another class. They can be of two types, Static. Known as nested static classes. They can’t access members of the outer class. Non-static. Known as inner classes. They can access members of the outer class even if the members are…