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Cédric Pontet

Talk · Architecture & DDD

Event-driven vs event sourcing : quelle est vraiment la différence ?

Two patterns that are often confused. A pragmatic definition of each, how they complement each other, and what to watch when you build them.

Architecture & DDD Video · 52 min 43 slides FR

Given at

  1. Voxxed Days Luxembourg June 2025 · in French
  2. Voxxed Days Luxembourg June 2024 · in French · recorded

Video

Play the video: Event-driven vs event sourcing : quelle est vraiment la différence ?, Voxxed Days Luxembourg 202451:49

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43 slides

Slides

PDF · 2.9 MB
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About the talk

What it covers

With microservices came a lot of talk about reactive programming and event-driven architecture, and event sourcing is often described as a pattern for distributed systems. In practice, the difference between the two is rarely clear.

I use concrete examples to show the benefits of both, and strategies of choreography and orchestration. Then the points that need care: distributed transactions, tracing and event versioning. Volunteers from the audience play the actors of restaurants around the world, so the difference is felt, not just explained.

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