Ports and Adapters Architecture With Kafka, Avro, and Spring-Boot

In this post, we will be implementing a Kafka Producer and Consumer using the Ports and Adapters (a.k.a. Hexagonal) architecture. We will also be using the KafkaAvroSerializer to send specific Avro types using Kafka and the Kafka Schema Registry.

Overall Flow

The overall workflow is something like this: a domain object (Person.java) is sent from BusinessDomainService to Kafka where it gets serialized to Avro object (PersonDto.java); which is then consumed from the Kafka topic via a Kafka Consumer and translated from Avro object (PersonDto.java) back to domain object (Person.java) before being sent back to BusinessDomainService for some arbitrary post-processing.

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