Protobuf Schema support AutoConsumeSchema and Presto table

[hnail]

Is your enhancement request related to a problem? Please describe.

1. Now , ProtobufSchema create and persistence dependency Java implementation class of GeneratedMessageV3 , create action code trace is ProtobufSchema.of(Class pojo) ->org.apache.avro.protobuf.ProtobufData.getSchema(Class c), but avro-protobuf lib i haven't find method to reflect class by Descriptor，so ProtobufSchema.loadReader() is don't support , and AutoConsumeSchema.generateSchema() haven't support PROTOBUF。
2. I am working for Presto pulsar table , but pulsar current protobuf comsumer need Java implementation class of GeneratedMessageV3 , Presto is a Long-Running server, so top server then update class is unfriendly。
3. Regist ProtobufSchema with Java implementation class of GeneratedMessageV3 is unfriendly for other languages instead of JAVA User : SimpleTypedProducerConsumerTest

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Describe the solution you'd like

AutoConsumeSchema support Protobuf , Presto table work with Protobuf schema register

1. ProtobufSchema regist use protoc descriptor_set_out file, persistence this single file content to Schema Registry，.desc conten is language-independent and readable .
   e.g. protoc --include_imports --descriptor_set_out=<filename>.desc <filename>.proto <filename>.proto <filename>.proto...
2. consumer support Protobuf AutoConsumeSchema by DynamicMessage ,e.g.

BufferedInputStream dscFile = new BufferedInputStream(new FileInputStream(new File ("desc file path")).getPath())
DescriptorProtos.FileDescriptorSet fileDescriptorSet = DescriptorProtos.FileDescriptorSet.parseFrom(dscFile);

• single_message example:

DynamicMessage.parseFrom(fileDescriptor.getMessageTypes().get(0), outputStream.toByteArray());

• multiple_message example :
  DynamicMessage.parseFrom(fileDescriptor.findMessageTypeByName(${MessageName}), outputStream.toByteArray());
  MessageName persistence with SchemaInfo.properties when create。

3. Then Presto ProtobufSchemaHandler can extract Field(etc. Value\List\Map ) from DynamicMessage

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Additional context
If this proposal is approved，I glad to make a more detailed description or PR 。

tag : Client \Schema Registry with Protobuffer , Presto

[sijie]

@hnail That sounds like a good approach! +1 from me. Can you write a PIP for that?

[hnail]

ok, thanks for @sijie replying , I will do that a few days