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ello Alexander and thank you for this wonderful book, you did not disappoint me: very good approach and no reference to CQRS (I don't like buzzwords), very nice to see the event sourcing approach applied using the unified log. Very clean decoupling. Cool stuff.

I was very eager to see the chapter on Idempotency because of the timing issue that might arise when working with a producer/consumer approach like this. Kafka handles well the event offset retrieval/save but still, your code needs to be aware of it.

I was wondering whether you are still planning to add it.

Thanks a lot!