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.api.observabilities;
  
  import io.opentelemetry.context.Scope;
  
  import java.util.Map;
  
  public interface TraceService {
      /**
       * Get the current user requesting values, e.g: the user-data in an trace
       * context request
       *
       * @return a map of key-value pairs
       */
      Map<String, String> getBaggageUserData();
      
      /**
       * Get the current user requesting value in context baggage, e.g: the
       * user-data value
       * in an
       * eagleeye context
       *
       * @param key The key of the parameter
       * @return The value of the parameter
       */
      String getBaggageUserDataValue(String key);
      
      /**
       * Build opentelemetry scope object to specified where user-data will be brought.
       * @param pairs key-value pairs of user-data that brought by baggage
       * @return return the opentelemetry scope object, used by try...final .
       */
      Scope withBaggageUserData(Map<String, String> pairs);
      
  }
  