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Hardware Acceleration in Android – Are You Using It?

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Did you know Android has Hardware Acceleration? Did you also know you actually need to enable it for your app first? Suprisingly you do! It’s not defaulted to on. Here’s another little gem in Android that could have a major impact on your application. If you allow your app to run on Android versions above 3.0, you should probably enable ...

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“Why You No Train?”

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It is a simple question. So why don’t you get more training? Do you feel that you operate already effectively? Is there no more stuff to learn? Do you think that you are already “good”? Sometimes,  just when we are walking about and we feel everything is going smoothly, then the bottom drops out of the bucket, our world suddenly ...

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Using Google Guava’s Ordering API

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We’ve been playing a bit more with Google’s Guava library – what a great library! The most recent thing we used it for was to sort out the comparators for our domain objects. Here’s how. Using Apache Isis‘ JDO Objectstore, it’s good practice to make your classes implement java.lang.Comparable, and use SortedSet for the collections. You can see this in ...

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Java 8: From PermGen to Metaspace

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As you may be aware, the JDK 8 Early Access is now available for download. This allows Java developers to experiment with some of the new language and runtime features of Java 8. One of these features is the complete removal of the Permanent Generation (PermGen) space which has been announced by Oracle since the release of JDK 7. Interned ...

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History of Open Source

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I gave a talk last year at Walmart HQ about Fuse open source integration and messaging, the benefits of using open source and the benefits of contributing to the Apache Software Foundation. You can find a sanitized version on slideshare.net. I also covered the history of open source, and like all histories there is no one ‘right’ story, but I ...

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Unix pipelines for basic spelling error detection

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Introduction We can of course write programs to do most anything we want, but often the Unix command line has everything we need to perform a series of useful operations without writing a line of code. In my Applied NLP class today, I show how one can get a high-confidence dictionary out of a body of raw text with a ...

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Defensive API evolution with Java interfaces

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API evolution is something absolutely non-trivial. Something that only few have to deal with. Most of us work on internal, proprietary APIs every day. Modern IDEs ship with awesome tooling to factor out, rename, pull up, push down, indirect, delegate, infer, generalise our code artefacts. These tools make refactoring our internal APIs a piece of cake. But some of us ...

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High Performance Durable Messaging

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Overview While there are a good number of high performance messaging systems available for Java, most avoid quoting benchmarks which include durable messaging and serialization/deserialization of messages. This is done for a number of reasons; 1) you don’t always need or want durable messages 2) you want the option of using your own serialization. One important reason they are avoided ...

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Building Vaadin UI with Xtend

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Today I have decided to say hello to Xtend . I had wish to learn some new programming language. The list of the criteria for choosing one, wasn’t so big . It must be a programming language running on JVM, and it would be nice if i don’t need to learn completely new eco system for building application. I have ...

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