

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





@Test
    void testDiffParametersAndReturn() throws Exception {
        Method method = DescriptorService.class.getMethod("testDiffParametersAndReturn", HelloReply.class);
        assertThrows(IllegalStateException.class, () -> {
            MethodDescriptor descriptor = new ReflectionMethodDescriptor(method);
            needWrap(descriptor);
        });
        Method method2 = DescriptorService.class.getMethod("testDiffParametersAndReturn2", String.class);
        assertThrows(IllegalStateException.class, () -> {
            MethodDescriptor descriptor = new ReflectionMethodDescriptor(method2);
            needWrap(descriptor);
        });
    }
    @Test
    void testErrorServerStream() throws Exception {
        Method method = DescriptorService.class.getMethod("testErrorServerStream", StreamObserver.class,
                HelloReply.class);
        assertThrows(IllegalStateException.class, () -> {
            MethodDescriptor descriptor = new ReflectionMethodDescriptor(method);
            needWrap(descriptor);
        });
        Method method2 = DescriptorService.class.getMethod("testErrorServerStream2", HelloReply.class, HelloReply.class,
                StreamObserver.class);
        assertThrows(IllegalStateException.class, () -> {
            MethodDescriptor descriptor = new ReflectionMethodDescriptor(method2);
            needWrap(descriptor);
        });
        Method method3 = DescriptorService.class.getMethod("testErrorServerStream3", String.class,
                StreamObserver.class);
        assertThrows(IllegalStateException.class, () -> {