Domain-centric? Why Hexagonal- and Onion-Architecture are answers to the wrong question @ Spring I/O

This talk presented by Oliver Drotbohm at Spring I/O 2026 explores the separation of technical and domain code through popular architectural approaches such as Hexagonal and Onion Architecture. The session addresses the necessary level of abstraction and the implications of using persistence metadata in the domain model. Drotbohm provides a theoretical overview, examines concrete examples, and discusses the trade-offs associated with different architectural methods. Additionally, the talk highlights how various tools and libraries can facilitate maintaining the intended structure in software projects.