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new members joined JUG Switzerland in 2025.

Oliver Drotbohm has been a member of the Spring open-source engineering team for 15 years. His work focused on software architecture, DDD, REST, and persistence technologies. His new book, “Modulithic Applications with Spring”, is due for release in 2026.

04.02.2026

Domain-centric? Why Hexagonal And Onion Architecture Are Answers to The Wrong Question – And What To Ask Instead

LOCATION: Zürich
KEYWORDS: Architecture, Open Source, Product, Technology

AGENDA:18:15-19:30h: Talk incl. Q/A
After the talk, you will have the opportunity to exchange ideas and network with the speaker and professional colleagues over beer and rich finger foods.

SPEAKER: Oliver Drotbohm   COMPANY: Broadcom
SLIDES: 260204_domain-centric-jugch-vdt.pdf

To separate technical from domain code, architectural approaches like Hexagonal or Onion Architecture are currently all the rage. However, discussions about their semantic details and their mapping to the source code structure of software projects are at least equally ubiquitous.

How much abstraction and mapping between architectural concepts is needed? Is persistence metadata in the domain model heresy? Above all, what is the actual goal of the exercise, and does it have to be so complicated?

We address these and other questions in a theoretical overview and by looking at concrete examples. We discuss the trade-offs of different approaches and how various tools and libraries help us to maintain the intended structural integrity.

LANGUAGE: Talk: en / Slides: en


Oliver Drotbohm has been a member of the Spring open-source engineering team for 15 years. His work focused on software architecture, DDD, REST, and persistence technologies. His new book, “Modulithic Applications with Spring”, is due for release in 2026.


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JUG Switzerland aims at promoting the application of Java technology in Switzerland.

JUG Switzerland facilitates the sharing of experience and information among its members. This is accomplished through workshops, seminars and conferences. JUG Switzerland supports and encourages the cooperation between commercial organizations and research institutions.

JUG Switzerland is funded through membership fees.

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