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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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Unit Testing of Spring MVC Controllers: Configuration

Writing unit tests for Spring MVC controllers has traditionally been both simple and problematic. Although it is pretty simple to write unit tests which invoke controller methods, the ...
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Auditing a Spring MVC Webapp with AspectJ. Part 1

If you’re like me, then you’ll have those kinds of programming days where everything seems to go incredibly well. You write the code and the tests and it just works. And then and ...
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