Mattias Severson



With a background in the hardware and embedded area, Mattias has shifted his focus to Java and the enterprise domain. He is a clean code proponent who appreciates Test Driven Development and Agile methodologies. Mattias has experience from many different environments, including everything between big server solutions for multinational companies down to flashing LEDs by using small micro controllers. Additionally, he has spoken at conferences such as SpringOne 2GX, ConFess, and Scandinavian Developer Conference.


1h - Slides+Speech

Functional Programming without Lambdas

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Java 8 is released and you might have played around with the new lambda features. Regrettably, when you return to your day job you find yourself stuck with an older version of Java. You know from experience that it will take a while before you can enjoy your new powers in a production environment. Fortunately, it is actually possible to leverage some of the functional-style techniques even in older Java versions. This means that you can program in a functional style, even if your organization has not updated to Java 8.

In this session, you'll learn about real-world experiences with functional frameworks such as LamdaJ, Functional Java and Guava. What should you consider before adopting them? How do they compare against one another? If you are stuck with a legacy Java version and want to be prepared for the functional future of Java 8, make sure to attend this session.

Spring Testing

Is it possible to decrease the turn-around time of your test suite? How can you make sure that your tests execute independently? Is it possible to automatically verify that the database schema is kept in sync with the source code? What are the trade-offs? In this presentation, you will learn how to apply features such as the Spring MVC Test Framework, Spring profiles, and embedded databases, to automate and improve your test suite, thus improving the overall quality of your project. A simplistic Spring web app will be used to show some practical code examples.

Topics include:

  • Basic Spring Testing
  • Embedded Database
  • Transactions
  • Profiles
  • Controller Tests





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