dubbo3.0.5 注解的方式配置，@ Configuration @Bean @DubboRef

1、接口定义

public interface Service2 {

String sayHello(String name);

String sayHello(ClientInfo clientInfo, String name);

default CompletableFuture<String> sayHelloAsync(String name){
   return CompletableFuture.completedFuture(sayHello(name));
}

default CompletableFuture<String> sayHelloAsync(ClientInfo clientInfo, String name){
    return CompletableFuture.completedFuture(sayHello(clientInfo, name));
}

}

2、

@Configuration public class DubboConsumerConfiguration {

@Bean
@DubboReference(
        check = false,
    methods = {
         // 如果删除这一行，则不报错
         //仅仅配置@Method(name = "sayHelloAsync"），报错
        //换成xml配置不报错
        //@DubboReference直接在filed上注入不报错
        @Method(name = "sayHelloAsync", onreturn = "service2_sayHelloAsync.onreturn")
    }
)
public ReferenceBean<Service2> service2() {
    return new ReferenceBean<>();
}

}

3、回调接口

public interface Notify {

void onreturn(String ret, String req); void onthrow(Throwable ex, String req);

}

@Component("service2_sayHelloAsync") public class NotifyImpl implements Notify{ @Override public void onreturn(String ret, String name) { System.out.println("callback调用"); var clientAtt = RpcContext.getClientAttachment().getObjectAttachments(); var serverAtt = RpcContext.getServerAttachment().getObjectAttachments(); var serverCtx = RpcContext.getServerContext(); var serviceCtx = RpcContext.getServiceContext(); System.out.println("clientAtt" + JSON.toJSONString(clientAtt)); System.out.println("serverAtt" + JSON.toJSONString(serverAtt)); System.out.println("serverCtx" + JSON.toJSONString(serverCtx.getObjectAttachments())); System.out.println("serviceCtx" + JSON.toJSONString(serviceCtx.getObjectAttachments())); System.out.println("callback调用2"); }

@Override
public void onthrow(Throwable ex, String name) {

}

}

报错

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'service2' defined in class path resource [org/chm/dubboexample/application1/DubboConsumerConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1708) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:581) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584) ... 19 more Caused by: java.lang.NullPointerException at org.apache.dubbo.config.spring.reference.ReferenceBeanSupport.convertToString(ReferenceBeanSupport.java:174) at org.apache.dubbo.config.spring.reference.ReferenceBeanSupport.convertToString(ReferenceBeanSupport.java:186) at org.apache.dubbo.config.spring.reference.ReferenceBeanSupport.convertToString(ReferenceBeanSupport.java:178) at org.apache.dubbo.config.spring.reference.ReferenceBeanSupport.generateReferenceKey(ReferenceBeanSupport.java:129) at org.apache.dubbo.config.spring.reference.ReferenceBeanSupport.generateReferenceKey(ReferenceBeanSupport.java:243) at org.apache.dubbo.config.spring.reference.ReferenceBeanManager.addReference(ReferenceBeanManager.java:70) at org.apache.dubbo.config.spring.ReferenceBean.afterPropertiesSet(ReferenceBean.java:242) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1767) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1704) ... 29 more 2022-02-02 00:28:14.033 WARN 11163 --- [ Thread-5] c.a.nacos.common.notify.NotifyCenter : [NotifyCenter] Start destroying Publisher 2022-02-02 00:28:14.033 WARN 11163 --- [ Thread-5] c.a.nacos.common.notify.NotifyCenter : [NotifyCenter] Destruction of the end

原提问者GitHub用户lifes