spring boot

When Disaster Strikes: Production Troubleshooting

Production is failing and everything is lost? That used to be the case. Fail whale, hysteria and panic. Developer observability fixes this!

Journeys in Java, Level 6: Build a Neo4j Microservice

Create a Neo4j database, get data loaded, then build a new service that interacts with the database and provides an API for client services.

Master-Detail with Hilla

Learn how to use the web application framework Hilla to create a master-detail view with a Grid to display the data and a Form to edit the data.

Journeys in Java, Level 5: Building an Empire of Microservices

We continue building our microservices system by adding a coordination layer to handle spinning multiple services up and down.

Diving into JVM Framework Monitoring and Profiling

Let’s look at how frameworks work under the hood, namely Quarkus and Spring Boot, and how many threads they initiate to serve up results.

Spring Transaction Debugging in Production with Lightrun

We use annotations to denote transactional behavior in modern Spring, so we have no code, no failure, no debugging… But is this true?

Journeys in Java, Level 4: Building an Empire of Microservices

Welcome to the fourth iteration in a series about building microservices in Java. Learn how microservices work from the ground up in Java!

Hilla 1.0: A new Frontend Framework for SpringBoot

Hilla is a new framework for building reactive web apps on Java backends. It seamlessly integrates a reactive Lit TypeScript frontend with a Spring Boot backend.

Journeys in Java, Level 3: Building an Empire of Microservices

We are still in the beginning stages of building microservices with Java, but we have already seen how to send and receive communications between two Spring Boot applications. In the first blog post of this series, our two applications transmitted …

Journeys in Java, Level 2: Building an Empire of Microservices

Let’s dive into the world of microservices find out the complexities, best practices, and troubles. I will share all my learnings, as well!

Building Reactive Java Applications with Spring Framework

Pretty much all Java developers are familiar with Spring Pet Clinic. In this article, we have given a walkthrough of the reactive implementation of it using Apache Cassandra.

Journeys in Java, Level 1: Building an Empire of Microservices

Let’s dive into the world of microservices find out the complexities, best practices, and troubles. I will share all my learnings, as well!

Build a Status Dashboard Using Spring Boot and Astra DB

Learn how to leverage the Astra Document API on top of Cassandra to build a dashboard of statuses, with Spring Boot for rendering. 

Multiple Spring Boot Applications in the Same Project

I frequently use Spring Boot in my demos. The latest one is no different, showing how to achieve CQRS using two different code paths.

Book Review: “Effortless Cloud-Native App Development Using Skaffold” (2)

Skaffold is a cloud native open source framework from Google that lets SpringBoot devs build Kubernetes apps easily and deploy effortlessly!

Better Error Handling for Your Spring Boot REST APIs

One of the things that distinguishes a decent API from one that is a pleasure to work with is robust error handling. Nothing is more frustrating than using some API and getting back cryptic errors where you can only guess why the server is not accepting your request.

Spring Boot lets you customize the error handling for your application, but there is quite a lot of low-level coding involved if you want to do this correctly.

New Book: “Taming Thymeleaf”

Spring Boot is heavily promoted as the best way to write REST API’s in Java, but it can also be used as a very good alternative to Laravel/PHP, Rails/Ruby, or Django/Python to write server-side rendered HTML for Java developers.

When combining the ease of use of Spring Boot with the power of Java and the easy templating of Thymeleaf, you have a very powerful combination that makes Java developers extremely productive to write web applications.

The book Taming Thymeleaf teaches you step-by-step how to get started with those technologies and build a fully fledged web application including security, validation, internationalization, testing and more.

Creating a Simple Spring Boot Application in IntelliJ IDEA

In this tutorial, we’ll use the New Project Wizard in IntelliJ IDEA to create a Spring Boot project with the Spring Web dependency.

We’ll also create a Spring Controller and served some text to the local Tomcat webserver.

Finally, we’ll add a test for our HTTP call.

Your own custom Spring Data repository

Functional Programming is becoming more and more popular. Spring provides a couple of DSLs for the Kotlin language. For example, the Beans DSL and the Routes DSL allow for a more functional approach toward Spring configuration. On the type side, Vavr (previously Javaslang) is pretty popular in Java, while Kotlin has Arrow.

In this post, I’d like to describe how one can use Arrow’s type system with Spring Data. Ultimately, you can benefit from the explanations to craft your custom Spring Data repository.

Kicking Spring Native’s Tires

I’ve been playing with GraalVM Ahead-Of-Time compilation capability since I became aware of it.

As a long-time Spring aficionado, I carefully monitored the efforts that the engineers at Tanzu have put into making Spring AOT-compatible. Recently, they announced the beta version of the integration.

In this post, I want to check how easy it is to produce a (working!) Docker image from an existing Spring Boot application.

Running Spring Boot Applications on OpenShift

Learn how to deploy a Spring Boot application on OpenShift (Minishift).

Cloud platforms have dramatically changed the way we develop and deploy modern applications. Not so long ago, everything was on-premise infra. However, things have changed dramatically over the years. Now, there are a number of vendors offering solutions for different cloud computing models, i.e., Saas, Paas, and Iaas.

This article will cover Openshift developed by Redhat, which comes under the Paas cloud computing model.