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Debugging the JVM

In some (rare) cases you might find yourself in the situation that you managed to crash the JVM itself. I most recently managed this by setting the name of a ThreadGroup to null. In these cases it is useful to debug the JVM itself so that the crash can be located more precisely. Here are the steps to do it ...

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Introducing Deliberate Caching


A few weeks ago I attended a ThoughtWorks Technology Radar seminar. I worked at ThoughtWorks for years and think if anyone knows what is trending up and down in software development these guys do. At number 17 in Techniques with a rising arrow is what they called Thoughtful Caching. At drinks with Scott Shaw, I asked him what it meant. ...

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Java 7: Project Coin in code examples

This blog introduces – by code examples – some new Java 7 features summarized under the term Project Coin. The goal of Project Coin is to add a set of small language changes to JDK 7. These changes do simplify the Java language syntax. Less typing, cleaner code, happy developer ;-) Let’s look into that. Prerequisites Install Java 7 SDK ...

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Why I Like The Verbosity of Java

Java is too verbose, they say. You can find comparisons of Hello World programs that take 2 lines in ruby and 10 lines in Java, and in order to read a file you need 20 lines in Java and just 1 in php. Even though the examples are often exaggerated (for example counting imports), it is true Java programs requires ...

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Play framework modules: Divide and conquer

It’s usually the case that you start developing an application and go on fulfilling requirements. When your application grows bigger you start to realize the convenience of separating it into different components. Moreover, when you develop your second or third application, your begin to recognize certain features that could be reused across different applications. These are two good reasons to ...

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Make your JAXB cleaner with the MOXy implementation

The principle advantage of using JAXB when marshalling and demarshalling XML is the programming model. Simply annotate a few POJOs and use the JAXB API’s and you can serialise to XML and deserialise from XML very easily. You don’t need to worry about the specifics regarding how the XML is marshalled / unmarshalled. Everything is much simpler than alternatives such ...

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Java EE 6 vs. Spring Framework: A technology decision making process

In the last few month we’ve went through this decision making process: which technology stack to choose for enterprise development on the Java platform? There are various alternatives. However, the ones we’ve discussed intensively were: Pure Java EE 6 Stack vs. Spring with Java EE. The following blog article summarizes key issues I found interesting when you consider one of ...

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EJB Lookup in a Vaadin Application

It has been a long time since the last Service Locator I have implemented. I thought it wouldn’t be necessary anymore considering the maturity of the Java EE CDI (Contexts and Dependency Injection). My first implementation was to make use of EJBs in a Struts-based web application. After that, I started working with JSF, which only requires annotated attributes with ...

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Domain modeling with Spring Data Neo4j

Hi all, Willie here. Last time I told you that I’m building the Skybase CMDB using Neo4j and Spring Data Neo4j, and I was excited to get a lot of positive feedback about that. I showed a little code but not that much. In this post I’ll show you how I’m building out the person configuration item (CI) in Skybase ...

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