text: /**
   * 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.
   */
  #pragma once
  
  #include <string>
  #include "rapidjson/document.h"
  
  namespace org {
  namespace apache {
  namespace nifi {
  namespace minifi {
  namespace processors {
  
  class PerformanceDataCounter {
   public:
    PerformanceDataCounter() = default;
    virtual ~PerformanceDataCounter() = default;
  
    virtual bool collectData() = 0;
    virtual void addToJson(rapidjson::Value& body, rapidjson::Document::AllocatorType& alloc) const = 0;
  
   protected:
    static rapidjson::Value& acquireNode(const std::string& node_name, rapidjson::Value& parent_node, rapidjson::Document::AllocatorType& alloc) {
      if (!parent_node.HasMember(node_name.c_str())) {
        rapidjson::Value value(rapidjson::kObjectType);
        rapidjson::Value key(node_name.c_str(), alloc);
        parent_node.AddMember(key, value, alloc);
      }
      return parent_node[node_name.c_str()];
    }
  };
  
  }  // namespace processors
  }  // namespace minifi
  }  // namespace nifi
  }  // namespace apache
  }  // namespace org
  