public static IncrementOperation build(
     long storeId, Keyspace keyspace, ByteString key, long delta) {
   KeyValueAction.Builder b = KeyValueAction.newBuilder();
   b.setAction(ActionType.INCREMENT);
   b.setStoreId(storeId);
   b.setKeyspaceId(keyspace.getKeyspaceId());
   b.setKey(key);
   b.setValue(ByteString.copyFrom(Value.fromLong(delta).asBytes()));
   return new IncrementOperation(b.build());
 }
  @Override
  public Value doAction(Value oldValue) {
    long oldValueLong = 0;

    if (oldValue != null) {
      oldValueLong = oldValue.asLong();
    }

    Value incrementBy = Value.fromRawBytes(entry.getValue());
    long newValueLong = oldValueLong + incrementBy.asLong();

    Value newValue = Value.fromLong(newValueLong);

    log.debug("Increment: {} -> {}", oldValueLong, newValueLong);

    // this.newValue = newValue.duplicate();

    Builder eb = response.addEntryBuilder();
    eb.setKey(entry.getKey());
    eb.setValue(ByteString.copyFrom(newValue.asBytes()));

    return newValue;
  }