public virtual async Task <T> DeserializeAsync(ReadOnlyMemory <byte> data, bool isNull, SerializationContext context)
{
using (var stream = new MemoryStream(data.ToArray(), false))
{
//Confluent Kafka format:
//https://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html#wire-format
if (stream.ReadByte() != 0x00)
{
throw new InvalidDataException("Invalid Confluent Kafka data format");
}
var bytes = new byte[4];
stream.Read(bytes, 0, bytes.Length);
var id = BitConverter.ToInt32(bytes, 0);
string schema;
if (cache.ContainsKey(id))
{
schema = cache[id];
}
else
{
schema = await RegistryClient.GetSchemaAsync(id);
cache.AddOrUpdate(id, schema, (key, oldValue) => schema);
}
var confluentSchema = new ConfluentSchema(schema);
var result = AvroConvert.DeserializeHeadless <T>(stream.ToArray(), confluentSchema.SchemaString);
return(result);
}
}
public AvroConvertSerializer(string schema)
{
var confluentSchema = new ConfluentSchema(schema);
_schema = confluentSchema.SchemaString;
}