ceph/src/jaegertracing/jaeger-client-cpp/src/jaegertracing/Tag.h

   1 /*
   2  * Copyright (c) 2017 Uber Technologies, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef JAEGERTRACING_TAG_H
  18 #define JAEGERTRACING_TAG_H
  19
  20 #include "jaegertracing/Compilers.h"
  21
  22 #include <algorithm>
  23 #include <cstdint>
  24 #include <opentracing/string_view.h>
  25 #include <opentracing/value.h>
  26 #include <opentracing/variant/variant.hpp>
  27 #include <string>
  28
  29 namespace jaegertracing {
  30 namespace thrift {
  31 class Tag;
  32 }
  33
  34 class Tag {
  35   public:
  36     using ValueType = opentracing::Value;
  37
  38     template <typename ValueArg>
  39     Tag(const std::string& key, ValueArg&& value)
  40         : _key(key)
  41         , _value(std::forward<ValueArg>(value))
  42     {
  43     }
  44
  45     template <typename ValueArg>
  46     Tag(const std::pair<std::string, ValueArg>& tag_pair)
  47         : _key(tag_pair.first)
  48         , _value(tag_pair.second)
  49     {
  50     }
  51
  52     bool operator==(const Tag& rhs) const
  53     {
  54         return _key == rhs._key && _value == rhs._value;
  55     }
  56
  57     const std::string& key() const { return _key; }
  58
  59     const ValueType& value() const { return _value; }
  60
  61     void thrift(thrift::Tag& tag) const;
  62
  63   private:
  64     std::string _key;
  65     ValueType _value;
  66 };
  67
  68 }  // namespace jaegertracing
  69
  70 #endif  // JAEGERTRACING_TAG_H