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Changelog service to create events from Kafka entity changes (e.g. topics, acls)

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package kafka.entity.changelog.serde;

import com.google.protobuf.InvalidProtocolBufferException;
import kafka.entity.changelog.schema.Topic;
import org.apache.kafka.common.serialization.Deserializer;
import org.apache.kafka.common.serialization.Serde;
import org.apache.kafka.common.serialization.Serializer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class CommandSerde implements Serde {

  static final Logger LOG = LoggerFactory.getLogger(CommandSerde.class);

  @Override public Serializer serializer() {
    return (topic, data) -> {
      if (data != null) return data.toByteArray();
      else return new byte[]{};
    };
  }

  @Override public Deserializer deserializer() {
    return (topic, data) -> {
      try {
        return Topic.Command.parseFrom(data);
      } catch (InvalidProtocolBufferException e) {
        LOG.error("Error deserializing topic event", e);
        return null;
      }
    };
  }
}