Speaker Details

Nicolai Parlog
Oracle
Nicolai (aka nipafx) is a Java enthusiast focused on language features and core APIs with a passion for learning and sharing - in articles, newsletters, and books; in tweets, videos, and streams; in demo repos and at conferences - more on all of that on nipafx.dev. He's a Java Developer Advocate at Oracle and organizer of Accento. That aside, he's best known for his haircut.
Data-Oriented Programming in Java (21 and 22)
Conference (INTERMEDIATE level)
In data-oriented programming (DOP), we model data as data and polymorphic behavior with pattern matching. This talk will introduce the concept of DOP and its four principles:
  • model the data, the whole data, and nothing but the data
  • data is immutable
  • validate at the boundary
  • make illegal states unrepresentable
We'll also explore how to use pattern matching as a safe, powerful, and maintainable mechanism for ad-hoc polymorphism on such data that lets us define operations without overloading the types with functionality. The talk ends with a juxtaposition to OOP, so you not only learn how to employ DOP but also when (not).
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OpenJDK is one of the world's most influential open source communities. It drives the reference implementation of Java SE and the Java Virtual Machine, a programming language and runtime environment used daily by millions of software developers. More than that, the community drives its innovation - 15 years and counting of new language features, core library additions, performance improvements, runtime enhancements, and new tooling.
But how does it all work? How does a community of Java enthusiasts, often financed by some of the biggest tech companies yet working with self-determination, turn ideas into designs into code into features you can use in your IDE? Well, let me explain (in this talk).
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