Hey!

I'm usually not making New Year commitments. If you're not like me and have to learn something new that can change how you build software, I have something for you.

No worries, it's not GenAI. It's another buzzword: Event Sourcing. And hey, is it actually a buzzword?

It was 10 years ago, but now it's a mature approach that helps you understand your systems. It provides a full understanding of both business processes and technical understanding. It has mature tooling and established dos and don'ts.

After my workshops, I heard a repeated comment: "It's not that hard as I thought it was, and actually really helpful".

If you want to verify if that'll also be your comment, check out my upcoming online workshop with Practical Introduction to Event Sourcing, which is part of Domain-Driven Design Europe Europe Academy.

The workshop will take place from January 27 to 30, 2025. Four hands-on sessions should give you a good foundation for applying Event Sourcing to your systems. You can do exercises in C#, Java or TypeScript.

Learning objectives:

I won't oversell it. You won't be an expert, but you'll get strong foundations on Event Sourcing, how to build systems with it, and, most importantly, what you don't know yet and where to look for answers. You will learn:

• How and when to apply Event Sourcing, as well as learning the core benefits this pattern brings

• How to reflect your business logic in the code using events

• The core differences to the classical approach

• Different tools such as Emmett, Marten and EventStoreDB and the differences between them

• How to apply Event Sourcing to your own system

• Challenges related to Event Sourcing and recommended solutions

Course Agenda:

1. Introduction to Event Sourcing. Basic terminology (event, stream of events, command), differences from the classical approach.

2. What is Event Sourcing, and how is it different from Event Streaming? Advantages and disadvantages.

3. Write model and data consistency guarantees.

4. Various ways of handling business logic: Aggregates, Command Handlers, functional approach.

5. Projections and best practices for building a read model from events.

6. Challenges in Event Sourcing and EDA: delivery guarantees, event processing orders, idempotency, etc.

7. Saga, Choreography, Process Manager, handling distributed processes.

8. Event Sourcing in the context of application architecture, and integration with other approaches.

9. Good and bad practices in modelling and handling events.

10. Event Sourcing in production, evolution, event versioning, etc.

That’s not all! As I appreciate that you’re my subscriber, I have a special 10% discount for you, it’s available through this link: https://ti.to/on3/dddacademy/discount/Oskar.

This offer is exclusive to Architecture Weekly subscribers; I won’t be giving any discount to others.

If that didn’t persuade you, check out recommendations from others who attended my workshop.

More of them are available on my LinkedIn profile.

Feel free to ask for more details by answering this e-mail.

If you prefer dedicated training for your team, consultancy, or architecture review, or if I could help you in another way, feel free to reach out. Here are more details on the workshops I’m typically giving: https://event-driven.io/en/training/

If you’re not interested but have someone who would like to attend, I’d appreciate it if you share it with them.

Cheers, and I wish you a great weekend!
Oskar