advanced~2h
Transactions & Exactly-Once Semantics
"Exactly once" is the most misunderstood phrase in Kafka. This module defines it precisely, then builds it.
Learning objectives
- Beginner: State precisely what Kafka's "exactly-once" guarantee actually covers, and the common misconception about what it doesn't.
- Intermediate: Use @Transactional or KafkaTemplate.executeInTransaction() to publish a message as part of a transactional unit of work.
- Advanced: Publish multiple messages atomically and reason about exactly-once semantics on the consumer side of a read-process-write pipeline.
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Transactions & Exactly-Once Semantics