Schema Registry Inheritance

Schema Registry
1

Hello. I am currently using Avro IDL (1.10.1). I have experience using the import command within the IDL, to resue common records. I always do the import like this:

// common.avdl file
@namespace("my.namespace.avro")
protocol CommonProtocol {
  record Common {
     string uuid;
  }
}

// specific.avdl file
@namespace("my.namespace.avro")
protocol SpecificProtocol {
  import idl "common.avdl";

  record Specific {
     Common common;
  }
}

So, to access the uuid from the Specific.java
→ specific.getCommon().getUuid() (One-level deep)

Question:
Is there a way to inherit ROOT LEVEL values into a schema?

For example, I would like Specific to have a root level, uuid.

// specific.avdl file
@namespace("my.namespace.avro")
protocol SpecificProtocol {
  record Specific {
     String uuid; --> But I would like this to come from an inherited file
  }
}

Why?
I am making many protocols and I’d like to enforce that certain value are present at the ROOT of all schemas; they are important and highly used values in the message. The way I am doing it, anything I inherit is always buried one-level deep in another class. Because of this, many are opting to simply copy/paste all root elements into multiple schemas; and just skip using the import approach in this case.

Thanks for any advice.

2

Not really, you can only inherit a record, so you always have an additional level. There are better option than copy/pasting through. Like adding certain field as part of the code generation. For example in bob2021 I add id to almost all the schema’s.

3

Thanks for the advice. Much appreciated!