

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 (singleArgument) {
                arguments = new Object[]{obj};
            } else {
                arguments = (Object[]) obj;
            }
            final TripleCustomerProtocolWapper.TripleRequestWrapper.Builder builder = TripleCustomerProtocolWapper.TripleRequestWrapper.Builder.newBuilder();
            builder.setSerializeType(serialize);
            for (Object argument : arguments) {
                builder.addArgTypes(argument.getClass().getName());
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                multipleSerialization.serialize(url, serialize, argument.getClass(), argument, bos);
                builder.addArgs(bos.toByteArray());
            }
            return builder.build().toByteArray();
        }
        /**
         * Convert hessian version from Dubbo's SPI version(hessian2) to wrapper API version
         * (hessian4)
         *
         * @param serializeType literal type
         * @return hessian4 if the param is hessian2, otherwise return the param
         */
        private String convertHessianToWrapper(String serializeType) {
            if (TripleConstant.HESSIAN2.equals(serializeType)) {
                return TripleConstant.HESSIAN4;
            }
            return serializeType;
        }
    }
    private static class PbArrayPacker implements Pack {