Do you want to know how to develop your skillset to become a Java Rockstar?

Subscribe to our newsletter to start Rocking right now!

To get you started we give you our best selling eBooks for FREE!


1. JPA Mini Book

2. JVM Troubleshooting Guide

3. JUnit Tutorial for Unit Testing

4. Java Annotations Tutorial

5. Java Interview Questions


and many more ....



Painless Containerized JBoss Generic Loan Processing on OpenShift


We talked about the various layers from the bottom up, but have yet to provide you with any application development tooling beyond the Red Hat We have been discussing why application developers can’t ignore their stack anymore in the  App Dev Cloud Stack series. Container Development Kit (CDK). All you have so far is an easy to install project called the  Container Development ...

Read More »

Velocity is Not Acceleration


I see a lot of confusion around velocity in new-to-agile teams. Too many people treat velocity as an acceleration measurement. That is, they expect velocity to increase to some large number, as a stable state. Velocity is a rate of change coupled with direction. When managers think they can measure a team with velocity, they confuse velocity with acceleration. As I enter ...

Read More »

Should you follow the rules?


In the last article I wrote that I’m a big fan of tools for static analysis. Those tools help you follow established rules. To be more specific, they’re yelling at you through red builds whenever you break these rules. Isn’t it great? Before your code gets under the review, we are already sure that many things have already been checked and ...

Read More »

Publish Subscribe model in Kafka


This is the fourth post in the series about integrating sync clients with async systems (1, 2, 3). Here we’ll try to understand how Kafka works in order to correctly leverage its publish-subscribe implementation. Kafka concepts According to the official documentation: Kafka is a distributed, partitioned, replicated commit log service. It provides the functionality of a messaging system, but with ...

Read More »

On the Virtues of Avoiding Parsing or Basing Logic on toString() Result


With Java or any other programming language I’ve used significantly, I have found that there are occasionally things that can be done in the language, but generally should not be done. Often, these misuses of the language seem harmless and perhaps beneficial when a developer first uses them, but later that same developer or another developer runs into associated issues ...

Read More »

Learning Lucene


I am currently working with a team starting a new project based on Lucene. While most of the time I would argue on using either Solr or Elasticsearch instead of plain Lucene it was a conscious decision. In this post I am compiling some sources for learning Lucene – I hope you will find them helpful or you can hint ...

Read More »

Most difficult programming languages


What are the most difficult programming languages to learn? Most people would have written some code in programming languages such as Java, C, C++ etc. Going back a bit further into the past, many would have programmed in Pascal, Fortran, COBOL etc. While starting out on the learning curve, most of these languages might have posed enough challenges and caused you to pull ...

Read More »

Data Aggregation Spring Data MongoDB: Nested results


1 Introduction In a previous post, we built a basic example of an aggregation pipeline. Maybe you want to take a look at Data aggregation with Spring Data MongoDB and Spring Boot if you need more detail about how to create the project and configure the application. In this post, we will focus on learning a use case where it makes ...

Read More »

Want to take your Java skills to the next level?

Grab our programming books for FREE!

Here are some of the eBooks you will get:

  • Spring Interview QnA
  • Multithreading & Concurrency QnA
  • JPA Minibook
  • JVM Troubleshooting Guide
  • Advanced Java
  • Java Interview QnA
  • Java Design Patterns