content: /*
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  package com.alibaba.cloudapp.microservice.aliyun.demo;
  
  import com.alibaba.cloudapp.api.microservice.TrafficService;
  import io.opentelemetry.context.Scope;
  import org.apache.dubbo.config.annotation.Service;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  
  @Service(version = "1.0.0", group = "DUBBO")
  public class DemoServiceImpl implements DemoService {
  
      private static final Logger logger = LoggerFactory.getLogger(
              DemoApplication.class);
  
      @Autowired
      private TrafficService trafficService;
  
      @Override
      public String tag(String name) {
          if (name == null || name.isEmpty()) {
              return "";
          }
          logger.info("traffic label before inject: {}", trafficService.getCurrentTrafficLabel());
          try (Scope ignored = trafficService.withTrafficLabel(name)){
              logger.info("traffic label after inject: {}", trafficService.getCurrentTrafficLabel());
          }
          return name;
      }
  }
  