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A Beginner’s Guide to Addressing Concurrency Issues

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Inserts, updates and deletes. Every framework tutorial starts with these and they are seen as the most basic functionality that just works. But what if two concurrent requests try to modify the same data? Or try to insert the same data that should be unique? Or the inserts and updates have side-effects that have to be stored in other tables ...

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What is management work?

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Continuing my discuss of management, broadly speaking my argument is: There is management work to do – the same as there is coding, testing and customer understanding. To pretend there isn’t such work to do, that all software development might be reduced to rational engineering is naive. Much of management work may be administration, we might be able reduce the ...

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Ceylon on mobile devices

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Ceylon already runs on the JVM, whether bare-bones, via JBoss Modules, Vert.x, Java EE Servlet containers such as WildFly, or OSGi containers, as well as on JavaScript VMs such as Node.js and the browser. But today we’re going to explain how to run Ceylon on mobile devices, not just in the browser (though it does play a part in it), ...

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Performance vs Reliability: Why Java Apps are Like F1 Cars

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 Think application performance and reliability is the same? Think again. Are performance and reliability related? Or are these things mutually exclusive? I think the latter. Today, the reality is that IT sees application performance and reliability as the same thing, but that couldn’t be further away from the truth. Let’s look at how Formula 1 teams manage performance and reliability. ...

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Code Review and Single Responsibility Principle

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According to the Single Responsibility Principle each unit in our code should have only one reason to change. Code Review, on the other hand, is a technique that helps us improve the quality of our code and increase its readability. I believe that you know both the principle and the technique. The question is: why do I juxtapose them in one article? Well, if ...

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Terminate and Relaunch in Eclipse

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A few days ago a new feature was committed to the Eclipse repository: Terminate and Relaunch. When enabled, Eclipse will terminate all currently running processes of a launch configuration before relaunching it. This feature is particularly useful if the process to launch holds a unique system resource. For example, a servlet container that listens on a particular port will throw ...

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Spark Streaming and Twitter Sentiment Analysis

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This blog post is the result of my efforts to show to a coworker how to get the insights he needed by using the streaming capabilities and concise API of Apache Spark. In this blog post, you’ll learn how to do some simple, yet very interesting analytics that will help you solve real problems by analyzing specific areas of a ...

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JavaFX Missing Features Survey: CSS

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In the last post of the Missing Features Survey series I said that this post would be about missing features in CSS and FXML. Now it turns out that the survey submissions did not contain any valid FXML issues. So I will focus on CSS only. These are the CSS features that were reported missing: Full CSS support – some properties ...

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Sorted pagination in Cassandra

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Cassandra is a fantastic database for different use cases. There are different situations when you need to twist Cassandra a little and studying one of those could be a helpful exercise to better understand what is Cassandra about. Databases are complex beasts, approaching them with the right level of abstraction is vital. Their final goal is not storing data per ...

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