In this post, I show an example of a spring boot application authentication with AWS Cognito. I also show how to create a user pool.

This tutorial shows how to expose and store application's Spring Boot Actuator metrics with Grafana and InfluxDB.

Learn to use the Spring @Value annotation to configure fields from property files, system properties, etc.

This tutorial explains the difference between Flux Create vs Generate in Project Reactor (Java Reactive Programming) with code samples.

Introduction Situation Most of our applications are supported by external services such as a database server, an SMS gateway, or services such as PayPal. Such services can exist in more than one environment i.e development…

A quick and practical overview of Spring Security integration with Kerberos.

Find out how you can add your own DSL to the Spring Security API.

Learn design patterns and principles for Object-oriented programming to make your software scalable and easy to maintain

SSLContext Exception in Android Kitkat. In this post, I show how to resolve SSLContext exception with TLSv1.2 in android Kitkat.

Learn how to generate OpenAPI 3.0 specifications for a Spring REST API using SpringDoc.

Basics of Blockchain. In this post, I describe what blockchain is and why it is getting so popularity lately. Blockchains.

Introduction Spring 3 introduced the Spring Expression Language (SpEL) which has a syntax similar to Unified EL. It can save you a lot of coding, because you can dynamically assign values at runtime. The folks…

Learn how to send transactional and marketing e-mails created with SendGrid from your Spring Boot application using their SDK

In this article, we introduce different types of @RequestMapping shortcuts for quick web development using traditional Spring MVC framework.

<p>Hi, Spring fans! Welcome to another installment of <em>This Week in Spring</em>! We’ve got a <em>ton</em> to get into, so let’s gooo!</p>
<ul>
<li><a href="https://twitter.com/JavaAtMicrosoft/status/1384914839005401095">Learn how to enable asynchronous…

ArrayList is one of the most commonly used collection classes of the Java Collection Framework because of the functionality and flexibility it provides. ArrayList is a List implementation that internally implements a dynamic array to…

This tutorial explains Circuit Breaker Pattern, one of the Microservice Design Patterns for designing highly resilient Microservices using resilience4j.

An extensive list of things to think through when starting a new Java-based software project.

Learn to create, and deploy, a full CRUD application with React and Spring Boot.