

通过dubbo-compiler的插件生成了接口，会自动生成xxxAsync()方法，但是它只是通过CompletableFuture.completedFuture()包装了同步方法，它仍然会阻塞consumer的业务线程。这么实现的目的是什么？

![image](https://user-images.githubusercontent.com/18373569/216303859-4c8fe6e5-428b-417c-baa5-df4aa444719c.png)

![image](https://user-images.githubusercontent.com/18373569/216304057-e564e268-14e6-40e3-8244-7380fd9c9c85.png)


## Ask your question here
我当前使用dubbo 3.1.4的triple协议(同时使用了IDL+protobuf)，想提供CompletableFuture<Result>返回值的异步调用，应该怎么做？

客户端如果不使用proxy=“nativestub”，会抛出以下错误：

This serialization only support google protobuf messages, but the actual input type is :java.util.concurrent.CompletableFuture

客户端如果使用proxy=“nativestub”，调用kickOffDeviceAsync(),实际上会调用CompletableFuture.completedFuture(kickOffDevice(request));.如此就会造成阻塞了，没有达到异步的目的





if (Objects.nonNull(timeout)) {
                this.timeout = parseTimeoutToMills(timeout);
            }
        } catch (Throwable t) {
            LOGGER.warn(PROTOCOL_FAILED_PARSE, "", "", String.format("Failed to parse request timeout set from:%s, service=%s "
                + "method=%s", timeout, serviceDescriptor.getInterfaceName(), methodName));
        }
        if (null != requestMetadata.get(TripleHeaderEnum.CONSUMER_APP_NAME_KEY.getHeader())) {
            inv.put(TripleHeaderEnum.CONSUMER_APP_NAME_KEY,
                requestMetadata.get(TripleHeaderEnum.CONSUMER_APP_NAME_KEY.getHeader()));
        }
        return inv;
    }
    private void sendHeader() {
        if (closed) {
            return;
        }
        if (headerSent) {
            throw new IllegalStateException("Header has already sent");
        }
        headerSent = true;
        DefaultHttp2Headers headers = new DefaultHttp2Headers();
        headers.status(HttpResponseStatus.OK.codeAsText());
        headers.set(HttpHeaderNames.CONTENT_TYPE, TripleConstant.CONTENT_PROTO);
        if (acceptEncoding != null) {
            headers.set(HttpHeaderNames.ACCEPT_ENCODING, acceptEncoding);
        }
        if (compressor != null) {
            headers.set(TripleHeaderEnum.GRPC_ENCODING.getHeader(),
                compressor.getMessageEncoding());