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Efficient Code Coverage with Eclipse

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There is a saying that a fool with a tool is still a fool. But how to use a tool most efficiently is not always obvious to me. Because of this I typically spend some time to check out new playgrounds1 that promise to increase my work speed without impairing quality. This way I came across EclEmma, a code coverage ...

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OpenSource License Manager

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What is a License Manager? License managers are used to enforce license rights, or at least to support the enforcement. When you develop an open source program, there is no much you need to or can do to enforce license rights. The code is there and if anyone just wants to abuse the program there is nothing technical that could ...

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HOW-TO: Spring Boot and Thymeleaf with Maven

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Spring Boot is a great piece of software allowing you to bootstrap Spring application within a few seconds. And it really works. As little configuration as possible to get started. And still possible to change the defaults. Let’s see how easily is to bootstrap Spring MVC with Thymeleaf and Maven and work with it in IntelliJ. Basic setup Spring MVC ...

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Clean Synchronization Using ReentrantLock and Lambdas

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Recently I was reading an informative post about the differences between synchronized vs ReentrantLock by Javin Paul1. He emphasises on the advantages of the latter, but does not withhold some downsides, which are related to the cumbersome try-finally block needed for proper usage. While agreeing on his statements I brooded about a thought, that always bothers me when it comes ...

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How to manage Git Submodules with JGit

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For a larger project with Git you may find yourself wanting to share code among multiple repositories. Whether it is a shared library between projects or perhaps templates and such used among multiple different products. The Git built-in answer to this problem are submodules. They allow putting a clone of another repository as a subdirectory within a parent repository (sometimes ...

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How can I do This? – With SQL of Course!

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Haven’t we all been wondering: How can I do this? I have these data in Excel and I want to group / sort / assign / combine … While you could probably pull up a Visual Basic script doing the work or export the data to Java or any other procedural language of choice, why not just use SQL? The ...

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Productive Developers are Smart and Lazy

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When I use the terms Smart, Lazy, and Developer, I mean the following: Smart as in intelligent and able to think things through (i.e. not smart-ass) Not a dreamer who never gets around to writing anything practical Lazy as in lazy-loading, that is wait to write code (i.e. not couch potato) Developer as in energetic and focused on building real-world ...

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Java 8 LongAdders: The Right Way To Manage Concurrent Counters

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I just lOvE new toys, and Java 8 has a bunch of them. This time around I want to talk about one of my favourites – concurrent adders. This is a new set of classes for managing counters written and read by multiple threads. The new API promises significant performance gains, while still keeping things simple and straightforward. As people ...

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Easter Hack: Even More Critical Bugs in SSL/TLS Implementations

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It’s been some time since my last blog post – time for writing is rare. But today, I’m very happy that Oracle released the brand new April Critical Patch Update, fixing 37 vulnerabilities in our beloved Java (seriously, no kidding – Java is simply a great language!). With that being said, all vulnerabilities reported by my colleagues (credits go to Juraj Somorovsky, Sebastian ...

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