

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 (!secondParameterStream) {
                throw new IllegalStateException(
                    "method params error: server stream's second param must be StreamObserver."
                        + " method=" + methodName);
            }
        }
        if (methodDescriptor.getRpcType() != MethodDescriptor.RpcType.UNARY) {
            if (MethodDescriptor.RpcType.SERVER_STREAM == methodDescriptor.getRpcType()) {
                if (!secondParameterStream) {
                    throw new IllegalStateException(
                        "method params error:server stream's second param must be StreamObserver."
                            + " method=" + methodName);
                }
            }
            
            if (returnClassProtobuf) {
                if (javaParameterCount > 0) {
                    throw new IllegalStateException(
                        "method params error: both normal and protobuf param found. method="
                            + methodName);
                }
            } else {
                if (protobufParameterCount > 0) {
                    throw new IllegalStateException("method params error method=" + methodName);
                }
            }
        } else {
            if (streamParameterCount > 0) {