

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





private static final Pack PB_PACK = o -> ((Message) o).toByteArray();
    private final Pack requestPack;
    private final Pack responsePack;
    private final UnPack requestUnpack;
    private final UnPack responseUnpack;
    public ReflectionPackableMethod(MethodDescriptor method, URL url, String serializeName) {
        Class<?>[] actualRequestTypes;
        Class<?> actualResponseType;
        switch (method.getRpcType()) {
            case CLIENT_STREAM:
            case BI_STREAM:
                actualRequestTypes = new Class<?>[]{
                    (Class<?>) ((ParameterizedType) method.getMethod()
                        .getGenericReturnType()).getActualTypeArguments()[0]};
                actualResponseType = (Class<?>) ((ParameterizedType) method.getMethod()
                    .getGenericParameterTypes()[0]).getActualTypeArguments()[0];
                break;
            case SERVER_STREAM:
                actualRequestTypes = method.getMethod().getParameterTypes();
                actualResponseType = (Class<?>) ((ParameterizedType) method.getMethod()
                    .getGenericParameterTypes()[1]).getActualTypeArguments()[0];
                break;
            case UNARY:
                actualRequestTypes = method.getParameterClasses();
                actualResponseType = method.getReturnClass();
                break;
            default:
                throw new IllegalStateException("Can not reach here");
        }
        boolean singleArgument = method.getRpcType() != MethodDescriptor.RpcType.UNARY;