

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





ServerCall.Listener listener;
            switch (methodDescriptor.getRpcType()) {
                case UNARY:
                    listener = new UnaryServerCallListener(invocation, invoker, responseObserver);
                    request(2);
                    break;
                case SERVER_STREAM:
                    listener = new ServerStreamServerCallListener(invocation, invoker,
                        responseObserver);
                    request(2);
                    break;
                case BI_STREAM:
                case CLIENT_STREAM:
                    listener = new BiStreamServerCallListener(invocation, invoker,
                        responseObserver);
                    request(1);
                    break;
                default:
                    throw new IllegalStateException("Can not reach here");
            }
            return listener;
        } catch (Throwable t) {
            LOGGER.error(PROTOCOL_FAILED_CREATE_STREAM_TRIPLE, "", "", "Create triple stream failed", t);
            responseErr(TriRpcStatus.INTERNAL.withDescription("Create stream failed")
                .withCause(t));
        }
        return null;
    }
}