

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 (!needWrap(method, actualRequestTypes, actualResponseType)) {
            requestPack = new PbArrayPacker(singleArgument);
            responsePack = PB_PACK;
            requestUnpack = new PbUnpack<>(actualRequestTypes[0]);
            responseUnpack = new PbUnpack<>(actualResponseType);
        } else {
            final MultipleSerialization serialization = url.getOrDefaultFrameworkModel()
                .getExtensionLoader(MultipleSerialization.class)
                .getExtension(url.getParameter(Constants.MULTI_SERIALIZATION_KEY,
                    CommonConstants.DEFAULT_KEY));
            this.requestPack = new WrapRequestPack(serialization, url, serializeName, singleArgument);
            this.responsePack = new WrapResponsePack(serialization, url, actualResponseType);
            this.requestUnpack = new WrapRequestUnpack(serialization, url, actualRequestTypes);
            this.responseUnpack = new WrapResponseUnpack(serialization, url, actualResponseType);
        }
    }
    public static ReflectionPackableMethod init(MethodDescriptor methodDescriptor, URL url) {
        final String serializeName = url.getParameter(SERIALIZATION_KEY,
            DefaultSerializationSelector.getDefaultRemotingSerialization());
        Object stored = methodDescriptor.getAttribute(METHOD_ATTR_PACK);
        if (stored != null) {
            return (ReflectionPackableMethod) stored;
        }
        ReflectionPackableMethod reflectionPackableMethod = new ReflectionPackableMethod(
            methodDescriptor, url, serializeName);
        methodDescriptor.addAttribute(METHOD_ATTR_PACK, reflectionPackableMethod);
        return reflectionPackableMethod;
    }
    static boolean isStreamType(Class<?> type) {
        return StreamObserver.class.isAssignableFrom(type) || GRPC_STREAM_CLASS.equalsIgnoreCase(