Avro Union Types

customer-events.avsc

[
  { "namespace": "com.dangets.customer",
    "type": "record",
    "name": "Address",
    "fields": [
      {"name": "receiver", "type": "string"},
      {"name": "streetAddress", "type": "string"},
      {"name": "addressLocality", "type": "string"},
      {"name": "addressRegion", "type": "string"},
      {"name": "postalCode", "type": "string"}
    ]
  },
  { "namespace": "com.dangets.customer",
    "type": "record",
    "name": "CustomerCreated",
    "fields": [
      {"name": "customerId", "type": "int"},
      {"name": "name", "type": "string"},
      {"name": "address", "type": "Address"}
    ]
  },
  { "namespace": "com.dangets.customer",
    "type": "record",
    "name": "CustomerAddressChanged",
    "fields": [
      {"name": "customerId", "type": "int"},
      {"name": "newAddress", "type": "Address"}
    ]
  },
  { "namespace": "com.dangets.customer",
    "type": "record",
    "name": "CustomerInvoicePaid",
    "fields": [
      {"name": "customerId", "type": "int"},
      {"name": "invoiceId", "type": "long"}
    ]
  },

  { "namespace": "com.dangets.customer",
    "type": "record",
    "name": "CustomerEvent",
    "fields": [
      {"name": "customerId", "type": "int"},
      {"name": "event", "type": ["CustomerCreated", "CustomerAddressChanged", "CustomerInvoicePaid"] }
    ]
  }
]