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 ....



Grails 3.3 has Spock 1.1

You’ll be glad to know that milestone 1 of Grails 3.3 has been released 3 days ago — and is also already available through SDKMAN!. Not only has it upgraded its dependencies to Hibernate 5.1.5, Spring Framework 4.3.7, Spring Boot 1.5.3 and Gradle 3.5, but it also finally ships with the latest Spock 1.1 testing framework. Spock is an old ...

Read More »

Why do devs hate Agile?

Someone asked me this the other day: “Why do devs hate agile?” and as I worked through my answer I thought it worth writing down. There are three reasons I can think of but before we get to them… First off, I don’t think all “devs do hate Agile”. Or rather, I don’t think the vast majority of them hate ...

Read More »

Short Retry vs Long Retry in Apache Camel

Camel Design Patterns book contains 20 patterns and numerous techniques and best practices for designing Apache Camel based integration solutions. Using this link only, JCG readers can buy Camel Design Patterns book with over 40% discount until end of June!         To get a feel of the book, below is a shorter version of the Retry Pattern ...

Read More »

Event Logs

Most system have some sort of event logs – i.e. what has happened in the system and who did it. And sometimes it has a dual existence – once as an “audit log”, and once as event log, which is used to replay what has happened. These are actually two separate concepts: the audit log is the trace that every ...

Read More »

Testing Spring Data + Spring Boot applications with Arquillian (Part 2)

In previous post, I wrote about how to test Spring Data application using Docker with Arquillian Cube. The test looked like: @RunWith(SpringRunner.class) @SpringBootTest(classes = PingPongController.class, webEnvironment = RANDOM_PORT) @ContextConfiguration(initializers = PingPongSpringBootTest.Initializer.class) public class PingPongSpringBootTest { @ClassRule public static ContainerDslRule redis = new ContainerDslRule("redis:3.2.6") .withPortBinding(6379); @Autowired TestRestTemplate restTemplate; @Test public void should_get_pongs() { // given restTemplate.postForObject("/ping", "pong", String.class); restTemplate.postForObject("/ping", "pung", String.class); // when final List<String> ...

Read More »

Clean Code from the trenches


Clean Code from the trenches – Validation Let’s directly start with an example. Consider a simple web service which allows clients to place order to a shop. A very simplified version of the order controller could look something like below – @RestController @RequestMapping(value = "/", consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE) public class OrderController { private final OrderService orderService; public ...

Read More »

Apache Camel 2.19 Released – Whats new

Apache Camel 2.19 was released on May 5th 2017 and its about time I do a little blog about what this release includes of noteworthy new features and improvements. Here is a list of the noteworthy new features and improvements. 1. Spring Boot Improvements The Camel 2.19 release has been improved for Spring Boot in numerous ways. For example all ...

Read More »

The difference between a compiler and an interpreter

According to their definitions, the difference between a compiler and an interpreter seems clear enough: interpreter a program that directly executes instructions written in a programming language compiler a program that transforms source code in a low(er)-level language If you dig deeper, though, you might find some blurring between the two. In fact an interpreter could translate the source language in a ...

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