Defining the schema

The first step is to define the Avro schema. As a reminder, our HealthCheck class looks like Listing 5.1:

public final class HealthCheck {
 private String event;
 private String factory;
 private String serialNumber;
 private String type;
 private String status;
 private Date lastStartedAt;
 private float temperature;
 private String ipAddress;
}

Listing 5.1: HealthCheck.java

Now, with the representation of this message in Avro format, the schema (that is, the template) of all the messages of this type in Avro would be Listing 5.2:

{
 "name": "HealthCheck",
 "namespace": "kioto.avro",
 "type": "record",
 "fields": [
 { "name": "event", "type": "string" },
 { "name": "factory", "type": "string" },
 { "name": "serialNumber...