In this Project reactor series, Lets take a look at switchOnFirst and its usage. If you are new to reactive programming, take a look at these following

This tutorial shows how to implement mesaging on Kubernetes using KubeMQ message broker and integrate Java application with it.

Learn about how we can search for free ports for Java servers.

This tutorial shows the performance comparison of the NATS messaging vs REST based microservices.

Showing new modules of Spring Cloud which replace Netflix OSS components: Spring Cloud Load Balancer, Consul and Circuit Breaker

A quick and practical guide to null-safety annotations in Spring.

Building in-memory data grid with Apache Ignite. Storing data in MySQL using Spring Data JPA.

The differences between access="permitAll", filters="none", security="none" in Spring Security.

In this post, I describe 7 AWS services that a developer should know about while working on AWS Cloud platform.

Level up your Java code and explore what Spring can do for you.

The Swagger Request Validator is a slick project supported by the folks at Atlassian. Using your API definition in Swagger v2 or OpenAPI v3, it allows you to programmatically validate your API matches your API…

This tutorial shows how to run GitLab on Kubernetes, and then create CI/CD pipelines for building and deploying Java and Maven applications.

Learn how to go serverless with Spring and using Spring Cloud Functions and deploying to AWS Lambda.

A quick and practical guide to using Spring MVC with Velocity.

Social KPI a saas application. In this post, I show how we will be designing the database for this application. Database design in details.

Have a look at how to integrate MyBatis with Spring and Spring Boot.

Learn about using constants in Java with a focus on common patterns and anti-patterns

How to do Basic Authentication with the Spring RestTemplate.

A guide to controlling HTTP cache control headers with Spring Security.

Learn how to fix HTTP error status 401 for CORS preflight requests