cpp/rocketmq-client-cpp-tests/cpp4.x/include/utils/data/collect/DataCollectorManager.h

/*
 * 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 <unordered_map>
#include <mutex>
#include <memory>
#include <string>
#include "utils/data/collect/DataCollector.h"
#include "utils/data/collect/impl/ListDataCollector.h"
#include "utils/data/collect/impl/MapDataCollector.h"

template <typename T>
class DataCollectorManager
{
private:
    static std::unique_ptr<DataCollectorManager<T>> instance;
    std::unordered_map<std::string, std::unique_ptr<DataCollector<T>>> collectMap;
    static std::mutex mtx;

    DataCollectorManager() {}

public:
    static DataCollectorManager &getInstance()
    {
        if (instance == nullptr)
        {
            std::lock_guard<std::mutex> lock(mtx);
            if (instance == nullptr)
                instance = std::unique_ptr<DataCollectorManager<T>>(new DataCollectorManager<T>());
        }
        return *instance;
    }

    DataCollector<T> &fetchDataCollector(const std::string &key)
    {
        std::lock_guard<std::mutex> lock(mtx);

        if (collectMap.find(key) == collectMap.end())
        {
            collectMap[key] = std::make_unique<MapDataCollectorImpl<T>>();
        }

        return *collectMap[key];
    }

    DataCollector<T> &fetchMapDataCollector(const std::string &key)
    {
        std::lock_guard<std::mutex> lock(mtx);

        if (collectMap.find(key) == collectMap.end() ||
            dynamic_cast<MapDataCollectorImpl<T> *>(collectMap[key].get()) == nullptr)
        {
            collectMap[key] = std::make_unique<MapDataCollectorImpl<T>>();
        }

        return *collectMap[key];
    }

    DataCollector<T> &fetchListDataCollector(const std::string &key)
    {
        std::lock_guard<std::mutex> lock(mtx);

        if (collectMap.find(key) == collectMap.end() ||
            dynamic_cast<ListDataCollectorImpl<T> *>(collectMap[key].get()) == nullptr)
        {
            collectMap[key] = std::make_unique<ListDataCollectorImpl<T>>();
        }

        return *collectMap[key];
    }

    void resetDataCollect(const std::string &key)
    {
        std::lock_guard<std::mutex> lock(mtx);

        if (collectMap.find(key) != collectMap.end())
        {
            collectMap[key]->resetData();
        }
    }

    void resetAll()
    {
        std::lock_guard<std::mutex> lock(mtx);

        for (auto &pair : collectMap)
        {
            pair.second->resetData();
        }
    }

    void removeDataCollect(const std::string &key)
    {
        std::lock_guard<std::mutex> lock(mtx);

        collectMap.erase(key);
    }

    void removeAll()
    {
        std::lock_guard<std::mutex> lock(mtx);

        collectMap.clear();
    }
};

template <typename T>
std::mutex DataCollectorManager<T>::mtx;

template <typename T>
std::unique_ptr<DataCollectorManager<T>> DataCollectorManager<T>::instance = nullptr;