Avro serialization in Ruby - how to write to a String/buffer instead of file
avro, ruby, serialization
Solution
Figured out myself:
schema = Avro::Schema.parse(SCHEMA)
dw = Avro::IO::DatumWriter.new(schema)
buffer = StringIO.new
encoder = Avro::IO::BinaryEncoder.new(buffer)
datum = Hash["name" =>name, "id" => id, "city" => city]
dw.write(datum, encoder)
buffer has the resultant avro serialized bytes.
Looks like there is no Avro client code generation in Ruby yet. We have to pass the data as Ruby hashes like I have done in for datum field.
Problem
I am trying to do avro serialization in Ruby. I have written the JSON schema, however I like to have the serialized data as bytes in Ruby instead of writing to file. My code is hanging something like: ``` SCHEMA = { "type": "record", "name": "User", "fields" : [ {"name": "name", "type": "string"}, {"name": "id", "type": "long"}, {"name": "city", "type": "string"} ] }.to_json schema = Avro::Schema.parse(SCHEMA) dw = Avro::IO::DatumWriter.new(schema) buffer = StringIO.new encoder = Avro::IO::BinaryEncoder.new(buffer) ??? ``` I have the values for name, id and city and wondering how to create the User object and serialize it into a string / byte buffer.