Data-oriented Programming in Java

on YouTube ↗49m

" summary

Argument: Java gains a practical path to data oriented programming by using records for immutable DTOs, sealed interfaces to enumerate outcomes, and pattern matching plus switch expressions to deconstruct types and guarantee exhaustiveness. Examples include modeling Optional as Some/None, a REST search with three result cases, and record constructors for boundary validation. Caveats: records do not fit JPA entities, JVM optimizes type checks, and migration is incremental rather than a rewrite.

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" chapters (7)

1. 0:00Introduction and speaker background
2. 2:57Evolution of Java applications
3. 7:34Introducing data-oriented programming
4. 12:07Java support for data-oriented programming
5. 27:10Implications for data-oriented programming
6. 33:56Modeling data as first-class citizen
7. 39:16Summary and Q&A

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