Conference Program

Please note:
On this page you will only see the English-language presentations of the conference. You can find all conference sessions, including the German speaking ones, here.

The times given in the conference program of OOP 2023 Digital correspond to Central European Time (CET).

By clicking on "VORTRAG MERKEN" within the lecture descriptions you can arrange your own schedule. You can view your schedule at any time using the icon in the upper right corner.

Thema: DDD

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  • Dienstag
    07.02.
  • Mittwoch
    08.02.
  • Donnerstag
    09.02.
, (Dienstag, 07.Februar 2023)
14:00 - 14:45
Di 7.2
Carving Microservices Out of the Monolith
Carving Microservices Out of the Monolith

For a microservices architecture to be successful it is crucial to have the right boundaries between the microservices. But where are the right boundaries? We would like to present a tool that helps us answer this question.

Domain Storytelling is a collaborative modeling method. It brings together domain experts and development teams. We let our users tell us stories about their work. While listening, we record the stories using a pictographic language.

In this talk we show how to find subdomains and which heuristics can help us.

Target Audience: Architects, Developers
Prerequisites: Project experience
Level: Advanced

Extended Abstract:
For a microservices architecture to be successful it is crucial to have the right boundaries between the microservices. But where are the right boundaries? We would like to present a tool that helps us answer this question.

Domain Storytelling is a collaborative modeling method. It brings together domain experts and development teams. We let our users tell us stories about their work. While listening, we record the stories using a pictographic language.

The experts can immediately see if we understand their story. After very few stories, we understand the language of our users and find different areas of the domain. Each of these areas (called a subdomain) is a good candidate to become a microservice in our architecture.

In this talk we show how to find subdomains and which heuristics can help us.

Henning Schwentner
Henning Schwentner

Henning Schwentner loves programming in high quality. He lives this passion as coder, coach, and consultant at WPS – Workplace Solutions in Hamburg, Germany. There he helps teams to structure their monoliths or to build new systems from the beginning with a sustainable architecture. Microservices or self-contained systems are often the result. Henning is author of “Domain Storytelling – A Collaborative Modeling Method” and the www.LeasingNinja.io as well as translator of “Domain-Driven Design kompakt”.

Henning Schwentner
Henning Schwentner
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, (Mittwoch, 08.Februar 2023)
09:00 - 10:30
Mi 9.1
Scenario Casting – Agility Starts in DDD's Problem Space!
Scenario Casting – Agility Starts in DDD's Problem Space!

This talk explains how Scenario Casting enables agile teams to pull together despite diverse ideas and concerns - in three iterative collaborative steps:
1. Find example scenarios of how ideas and concerns affect the domain - strictly in domain language! This provides an initial Scenario Backlog outlining the problem space.
2. Prioritize the Scenario Backlog and agree on scope.
3. Combine the top scenarios into coherent overarching Orientation Scenarios.

Let the agile teams focus on their parts of the Orientation Scenarios over the next iteration(s).

Target Audience: Stakeholders, Non-IT Domain Experts, BAs, Developers, Architects, QMs, Agilists
Prerequisites: Project experience, basic knowledge of DDD, basic knowledge of agile methods
Level: Advanced

Extended Abstract:
Scenario Casting is a collaborative planning and requirements engineering method that has emerged over the past four years in various Domain-Driven Design projects. It is used intensively with dozens of teams most of them involved in ambitious transformation projects.
Scenario Casting is especially helpful for getting a handle on complex or even overwhelming domains. If your domain feels like this and there are a lot of people involved too, you should give Scenario Casting a try.
Scenario Casting lays the groundwork for focused collaborative modeling sessions using domain storytelling or event storming. It ensures that all relevant points are addressed step by step. Also, it helps to quickly identify your domain's subdomains and determine the people who should be involved.

More relevant scenarios are discovered during collaborative modeling. They all go into the Scenario Backlog and will be considered in future Scenario Castings.
Unlike other concepts that try to scale agile, the Scenario Backlog is strictly limited to DDD's problem space, thus avoiding upfront design and premature planning.
Instead, Scenario Casting sets a common focus in problem space for agile teams by defining Orientation Scenarios. An Orientation Scenario illuminates parts of the problem space very precisely. It defines the actual results that solutions must deliver from a domain perspective - but without prescribing specific solutions. Finding and implementing good solutions remains the responsibility of the individual agile teams!

This talk contains examples from real projects and gives you best practices - so you get a good idea of how to try Scenario Casting yourself!

Jörn Koch
Jörn Koch

Jörn Koch is an agile and DDD coach and trainer. He worked many years as a developer and architect. Jörn loves ambitious projects in highly collaborative environments. He has practical experience as an agile coach for 15 years, and as a DDD coach for 6 years.

Jörn Koch
Jörn Koch
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, (Donnerstag, 09.Februar 2023)
18:30 - 20:00
Ndo 2
How to Upgrade a Ubiquitous Language into a Domain-Specific Language
How to Upgrade a Ubiquitous Language into a Domain-Specific Language

Language defines the boundary to our world: it sets what we can describe and what we can’t. This talk describes how to formalize a ubiquitous language into a domain-specific language. The resulting language is used for communication and collaboration as well as used as a basis for generating code, tests, configs, etc. The talk is based on industry cases from various domains, such as banking and insurance, industry automation and automotive.

Target Audience: Developers, Subject Matter/Domain Experts, Managers
Prerequisites: Experiences on applying some modeling language
Level: Advanced

Extended Abstract:
Language defines the boundary to our world: it sets what we can describe and also what we can’t. This talk describes how to formalize a ubiquitous language into a domain-specific language. The resulting language is then used for communication and collaboration, and also as a basis for generating code, tests, configuration, etc. The talk is based on industry cases from various domains, such as banking, insurance, industrial automation and automotive. A particular emphasis in industry cases is how experts from different fields can apply the same language. We will describe language definition cases from practice and illustrate how the created languages have become the cornerstone of development activities.

Juha-Pekka Tolvanen
Juha-Pekka Tolvanen

Juha-Pekka Tolvanen works for MetaCase. He has been involved in domain-specific languages and tools since 1991 and acted as a consultant world-wide on their use. Juha-Pekka has co-authored a book (Domain-Specific Modeling, Wiley 2008) and over 100 articles in software development magazines and conferences. Juha-Pekka holds a Ph.D. in computer science.

Juha-Pekka Tolvanen
Juha-Pekka Tolvanen
Vortrag: Ndo 2
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