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 ....



First Steps Into the World of Go


Since developers should learn a new programming language every year, I felt it was about time for me to dive into something new and I decided on Go. The good news is that Go has awesome documentation to get you started. More good news is that Go has a mature ecosystem of tools, including support for getting dependencies, formatting, and testing. There ...

Read More »

It takes an engineer to manage engineering


I’ve been meaning to write about the managers and Agile software development for a long time. And, apart from a few asides, I haven’t. Why not? Well partly because the topic is difficult, or rather large, but mostly I’ve not written it because I’m fearful of the flames that will come down on me. You see I think managers have ...

Read More »

The importance of single-partition operations in Cassandra


DuyHai Doan is an Apache Cassandra Evangelist at DataStax. He spends his time between technical presentations/meetups on Cassandra, coding on open source projects to support the community and helping all companies using Cassandra to make their project successful. Previously he was working as a freelance Java/Cassandra consultant. In this blog post, we’ll explain the reason why all Cassandra experts and ...

Read More »

Performance improvements… or experiments?


The project I’m involved in will face great challenges in the upcoming years. That was the reason why we have decided to focus on improving performance of the application before these improvements become a necessity. How to increase efficiency? Stability? Responsiveness? How to prepare for future? That was the question that we asked ourselves and our goal was to find ...

Read More »

Beware Of findFirst() And findAny()


After filtering a Java 8 Stream it is common to use findFirst() or findAny() to get the element that survived the filter. But that might not do what you really meant and subtle bugs can ensue. So What’s Wrong With findFirst() And findAny()? As we can see from their Javadoc (here and here) both methods return an arbitrary element from ...

Read More »

Implement custom JMeter samplers


As we proceed on different architectures and implementations the need for versatile stress testing tools rises. Apache Jmeter is one the most well known tools when it comes to load testing. It supports many protocols such as ftp http tcp and also it can be used easily for distributed testing. Jmeter also provides you with an easy way to create ...

Read More »

Isolating integration tests and mocking dependencies with Spring Boot


Integration tests can be slow and unreliable because they depend on too many components in the system. Up to a certain point, this is unavoidable: integration tests are here to validate how each part of your system plays with other internal or external components. We can, however, improve some integration tests by only spinning up the required dependencies, instead of ...

Read More »

Java EE 8 MVC: Working with Path Parameters


In the previous post we saw how to work with query parameters in Java EE MVC. This post continues with a very similar topic: path parameters. Path parameters are a dynamic part of the request path and can be specified with the @Path annotation. For example: @Controller @Path("path-params") public class PathParamsController { @GET @Path("/date/{year}/{month}") public String pathParamDate(@PathParam("year") int year, @PathParam("month") ...

Read More »

How to Detect Slow Queries with jOOQ


Just now, we implemented a nice little feature in jOOQ’s code generator: It detects whenever the jOOQ code generator runs a slow query to reverse engineer schema meta information. Why? In our development and integration test environment, we don’t have huge schemas with all the different performance edge cases put in place. For instance, we don’t have 5000 Oracle ...

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