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An Automated OSGi Test Runner

Among my fellow team members I was known for notoriously forgetting to maintain the (JUnit) test suite. I just can’t get this extra step of manually adding a test to a suite into ...
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Mini Search Engine – Just the basics, using Neo4j, Crawler4j, Graphstream and Encog

Continuing to chapter 4 of Programming Collection Intelligence  (PCI) which is implementing a search engine. I may have bitten off a little more than I should of in 1 exercise. Instead ...
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How to use Reflection to Document your Data Model based on JPA Annotations

So using JPA, Hiber­nate or EBeans is cool when you can just anno­tate your Java classes, but haven’t you always wished you could “gen­er­ate” doc­u­men­ta­tion of your ...
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Messaging with RabbitMQ

We previously published a brief tutorial showing how to set up a Spring RabbitMQ Template. Now, let’s take a step back for a broader view of what RabbitMQ is and how you might use ...
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Spring MVC Custom Validation Annotations

Last tutorial, I showed how to validate a form using annotations. This works great for simple validations, but eventually, you’ll need to validate some custom rules that aren’t ...
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Auditing a Spring MVC Webapp with AspectJ. Part 2

Now, this is the blog you want to read if you’re interested in creating a Spring MVC Webapp that uses Aspect Oriented Programming (AOP) in the form of Aspectj’s @Aspect ...
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su and sudo in Spring Security applications

Long time ago I worked on a project that had a quite powerful feature. There were two roles: user and supervisor. Supervisor could change any document in the system in any way while ...
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Java EE EJB Interceptors tutorial and example

In this example we are going to see how to use Interceptors in an EJB and test it using a simple Web Application. 1. Introduction Interceptors are used, as the name suggests, when you ...
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LINQ and Java

LINQ has been quite a successful, but also controversial addition to the .NET ecosystem. Many people are looking for a comparable solution in the Java world. To better understand what ...
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Apache Server and JMeter debugging

I had been using JMeter to generate load for my production server to test my application. The test-plan has 13+ HTTP sampler to make different request and one Regular Expression extractor ...
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