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Synchronous Kafka With Spring Request-Reply

Gaurav Gupta shows how to use Spring-Kafka to implement a request-reply pattern:

The behavior of request-reply is consistent even if you were to create, say, three partitions of the request topic and set the concurrency of three in consumer factory. The replies from all three consumers still go to the single reply topic. The container at the listening end is able to do the heavy lifting of matching the correlation IDs.

Kafka’s real advantage still comes from distributed, asynchronous processing, but if you have a use case where you absolutely need synchronous processing, you can do that in Kafka as well.

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