

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





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 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.dubbo.rpc.protocol.tri;
import org.apache.dubbo.common.stream.StreamObserver;
import org.apache.dubbo.rpc.model.MethodDescriptor;
import org.apache.dubbo.rpc.model.ReflectionMethodDescriptor;
import io.reactivex.Single;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import reactor.core.publisher.Mono;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
class ReflectionPackableMethodTest {
    @Test
    void testMethodWithNoParameters() throws Exception {
        Method method = DescriptorService.class.getMethod("noParameterMethod");
        MethodDescriptor descriptor = new ReflectionMethodDescriptor(method);
        assertEquals("", descriptor.getParamDesc());
        Assertions.assertEquals(0, descriptor.getParameterClasses().length);
    }
    @Test
    void testMethodWithNoParametersAndReturnProtobuf() throws Exception {
        Method method = DescriptorService.class.getMethod("noParameterAndReturnProtobufMethod");