An object will be sent to Kafka once an event is produced. Similarly, Kafka will send this produced object to all listeners (microservices). In short, the produced object travels over the network. Therefore, we need serialization support for these objects. We'll make use of Apache Avro for data serialization. It defines the data structure (schema) in JSON format and provides a plugin for both Maven and Gradle to generate Java classes using the JSON schema. Avro works well with Kafka because both Avro and Kafka are Apache products and align well with each other for integration.
Let's start by defining the schema that represents the object sent over the network when a new booking is created. As we did earlier when we were ...
