@Override
  public long add(E item) {
    checkNotNull(item, "item can't be null");

    Data element = toData(item);
    ClientMessage request =
        RingbufferAddCodec.encodeRequest(name, OverflowPolicy.OVERWRITE.getId(), element);
    ClientMessage response = invoke(request, partitionId);
    RingbufferAddCodec.ResponseParameters resultParameters =
        RingbufferAddCodec.decodeResponse(response);
    return resultParameters.response;
  }
  @Override
  public ICompletableFuture<Long> addAsync(E item, OverflowPolicy overflowPolicy) {
    checkNotNull(item, "item can't be null");
    checkNotNull(overflowPolicy, "overflowPolicy can't be null");

    Data element = toData(item);
    ClientMessage request = RingbufferAddCodec.encodeRequest(name, overflowPolicy.getId(), element);
    request.setPartitionId(partitionId);

    try {
      ClientInvocationFuture invocationFuture = new ClientInvocation(getClient(), request).invoke();
      return new ClientDelegatingFuture<Long>(
          invocationFuture,
          getContext().getSerializationService(),
          ADD_ASYNC_ASYNC_RESPONSE_DECODER);
    } catch (Exception e) {
      throw ExceptionUtil.rethrow(e);
    }
  }
 @Override
 public Long decodeClientMessage(ClientMessage clientMessage) {
   return RingbufferAddCodec.decodeResponse(clientMessage).response;
 }