void handle(ScannedGenericBeanDefinition beanDefinition, BeanDefinitionRegistry registry) {
   Map<String, Object> attributes =
       beanDefinition.getMetadata().getAnnotationAttributes(this.annotationType.getName());
   if (attributes != null) {
     doHandle(attributes, beanDefinition, registry);
   }
 }
  @Override
  protected Set<BeanDefinitionHolder> doScan(String... basePackages) {
    Assert.notEmpty(basePackages, "At least one base package must be specified");
    Set<BeanDefinitionHolder> beanDefinitions = new LinkedHashSet<BeanDefinitionHolder>();
    for (String basePackage : basePackages) {
      Set<BeanDefinition> candidates = findCandidateComponents(basePackage);
      for (BeanDefinition candidate : candidates) {
        ScopeMetadata scopeMetadata = this.scopeMetadataResolver.resolveScopeMetadata(candidate);
        candidate.setScope(scopeMetadata.getScopeName());
        String beanName = this.beanNameGenerator.generateBeanName(candidate, this.registry);
        if (candidate instanceof AbstractBeanDefinition) {
          postProcessBeanDefinition((AbstractBeanDefinition) candidate, beanName);
        }
        if (candidate instanceof AnnotatedBeanDefinition) {
          processCommonDefinitionAnnotations((AnnotatedBeanDefinition) candidate);
        }

        ScannedGenericBeanDefinition bd = (ScannedGenericBeanDefinition) candidate; // 通用bean扫描
        bd.setBeanClassName(HessianServiceExporter.class.getName()); // 设置bean名称
        bd.setBeanClass(HessianServiceExporter.class); // 设置bean类
        bd.getPropertyValues().add("service", registry.getBeanDefinition(beanName)); // 设置属性 service
        String[] interfaces = bd.getMetadata().getInterfaceNames(); // 获得元数据、接口名称

        if (interfaces == null || interfaces.length == 0) continue;
        Class interf = null;
        try {
          interf = Class.forName(interfaces[0]); // 获得接口
        } catch (ClassNotFoundException e) {
          continue;
        }
        bd.getPropertyValues().add("serviceInterface", interf); // 设置属性 serviceInterface
        candidate = bd;
        BeanDefinitionHolder definitionHolder =
            new BeanDefinitionHolder(candidate, "/" + beanName); // 新bean定义持有
        definitionHolder =
            applyScopedProxyMode(scopeMetadata, definitionHolder, this.registry); // 应用范围代理模式
        beanDefinitions.add(definitionHolder); // 将bean定义持有放入bean定义持有set中
        registerBeanDefinition(definitionHolder, this.registry); // 注册bean定义
      }
    }

    if (beanDefinitions.isEmpty()) {
      System.out.println("not service be scaned");
    } else {
      for (BeanDefinitionHolder holder : beanDefinitions) {
        AnnotatedBeanDefinition definition =
            (AnnotatedBeanDefinition) holder.getBeanDefinition(); // 注释的bean定义
        System.out.println("service:" + holder.getBeanName()); // 注释的bean定义名称
        System.out.println(
            "service:" + definition.getMetadata().getAnnotationTypes()); // 注释的bean定义类型
      }
    }

    return beanDefinitions;
  }