About Tomasz Nurkiewicz

Java EE developer, Scala enthusiast. Enjoying data analysis and visualization. Strongly believes in the power of testing and automation.

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Advanced ListenableFuture capabilities

Last time we familiarized ourselves with ListenableFuture. I promised to introduced more advanced techniques, namely transformations and chaining. Let’s start from something straightforward. ...
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ListenableFuture in Guava

ListenableFuture in Guava is an attempt to define consistent API for Future objects to register completion callbacks. With the ability to add callback when Future completes, we can ...
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Implementing custom Future

Last time we learned the principles behind java.util.concurrent.Future<T>. We also discovered that Future<T> is typically returned by libraries or frameworks. But there ...
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java.util.concurrent.Future basics

Hereby I am starting a series of articles about future concept in programming languages (also known as promises or delays) with a working title: Back to the Future. Futures are very ...
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Breaking build is not a crime

For years I’ve been taught that breaking continuous integration build is something that should be avoided under all circumstances. Let me first quote few classics. Uncle Bob in ...
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Don’t rely on unit tests alone

When you are building a complex system, barely testing components in isolation is not enough. It’s crucial, but not enough. Imagine a car factory that manufactures and imports ...
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How aggressive is method inlining in JVM?

Ctrl + Alt + M is used in IntelliJ IDEA to extract method. Ctrl + Alt + M. It’s as simple as selecting a piece of code and hitting this combination. Eclipse also has it. I hate ...
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Spring Data JDBC generic DAO implementation – most lightweight ORM ever

I am thrilled to announce first version of my Spring Data JDBC repository project. The purpose of this open source library is to provide generic, lightweight and easy to use DAO implementation ...
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Probability distribution for programmers

This is one of these very simple programming puzzles I came across recently: given a function returning random integers from 0 to 4 inclusive with equal probability, write a function ...
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@Cacheable overhead in Spring

Spring 3.1 introduced great caching abstraction layer. Finally we can abandon all home-grown aspects, decorators and code polluting our business logic related to caching.                   Since ...
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