dubbo:
 application:
  name: lizo-consumer
 registry:
  address: zookeeper://localhost:12181

 @Bean
 ProviderFilter providerFilter() {
  return new ProviderFilter();
 }
 static class ProviderFilter extends AbstractDubboProviderFilterSupport {
  public Result invoke(Invoker<?> invoker, Invocation invocation) {
   System.out.println("ProviderFilter");
   return invoker.invoke(invocation);
  }
 }

 @Bean
 CustomFilter customFilter() {
  return new CustomFilter();
 }
 @Activate(group = Constants.PROVIDER)
 static class CustomFilter extends AbstractDubboFilterSupport {
  public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
   System.out.println("ProviderFilter2");
   return invoker.invoke(invocation);
  }
  public Filter getDefaultExtension() {
   return this;
  }
 }