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线程-8-日志_线程池

article 2025/1/7 14:19:16

主要看code

日志：


日志指标/属性

设计模式：策略模式
日志格式：

[可读性很好的时间] [⽇志等级] [进程pid] [打印对应⽇志的⽂件名][⾏号] - 消息内容，⽀持可
变参数
[2024-08-04 12:27:03] [DEBUG] [202938] [main.cc] [16] - hello world
[2024-08-04 12:27:03] [DEBUG] [202938] [main.cc] [17] - hello world
[2024-08-04 12:27:03] [DEBUG] [202938] [main.cc] [18] - hello world


code

完整详细代码：https://gitee.com/whb-helloworld/112/blob/master/code/lesson32/

Log

log.hpp
#pragma once

#include <iostream>
#include <cstdio>
#include <string>
#include <fstream>
#include <sstream>
#include <memory>
#include <filesystem> //C++17
#include <unistd.h>
#include <time.h>
#include "Mutex.hpp"

namespace LogMudule
{
    using namespace LockModule;

    // 获取一下当前系统的时间
    std::string CurrentTime()
    {
        time_t time_stamp = ::time(nullptr);
        struct tm curr;
        localtime_r(&time_stamp, &curr); // 时间戳，获取可读性较强的时间信息5

        char buffer[1024];
        // bug
        snprintf(buffer, sizeof(buffer), "%4d-%02d-%02d %02d:%02d:%02d",
                 curr.tm_year + 1900,
                 curr.tm_mon + 1,
                 curr.tm_mday,
                 curr.tm_hour,
                 curr.tm_min,
                 curr.tm_sec);

        return buffer;
    }

    // 构成: 1. 构建日志字符串 2. 刷新落盘(screen, file)
    //  1. 日志文件的默认路径和文件名
    const std::string defaultlogpath = "./log/";
    const std::string defaultlogname = "log.txt";

    // 2. 日志等级
    enum class LogLevel
    {
        DEBUG = 1,
        INFO,
        WARNING,
        ERROR,
        FATAL
    };

    std::string Level2String(LogLevel level)
    {
        switch (level)
        {
        case LogLevel::DEBUG:
            return "DEBUG";
        case LogLevel::INFO:
            return "INFO";
        case LogLevel::WARNING:
            return "WARNING";
        case LogLevel::ERROR:
            return "ERROR";
        case LogLevel::FATAL:
            return "FATAL";
        default:
            return "None";
        }
    }

    // 3. 刷新策略.
    class LogStrategy
    {
    public:
        virtual ~LogStrategy() = default;
        virtual void SyncLog(const std::string &message) = 0;
    };

    // 3.1 控制台策略
    class ConsoleLogStrategy : public LogStrategy
    {
    public:
        ConsoleLogStrategy()
        {
        }
        ~ConsoleLogStrategy()
        {
        }
        void SyncLog(const std::string &message)
        {
            LockGuard lockguard(_lock);
            std::cout << message << std::endl;
        }

    private:
        Mutex _lock;
    };

    // 3.2 文件级(磁盘)策略
    class FileLogStrategy : public LogStrategy
    {
    public:
        FileLogStrategy(const std::string &logpath = defaultlogpath, const std::string &logname = defaultlogname)
            : _logpath(logpath),
              _logname(logname)
        {
            // 确认_logpath是存在的.
            LockGuard lockguard(_lock);

            if (std::filesystem::exists(_logpath))
            {
                return;
            }
            try
            {
                std::filesystem::create_directories(_logpath);
            }
            catch (std::filesystem::filesystem_error &e)
            {
                std::cerr << e.what() << "\n";
            }
        }
        ~FileLogStrategy()
        {
        }
        void SyncLog(const std::string &message)
        {
            LockGuard lockguard(_lock);
            std::string log = _logpath + _logname; // ./log/log.txt
            std::ofstream out(log, std::ios::app); // 日志写入，一定是追加
            if (!out.is_open())
            {
                return;
            }
            out << message << "\n";
            out.close();
        }

    private:
        std::string _logpath;
        std::string _logname;

        // 锁
        Mutex _lock;
    };

    // 日志类: 构建日志字符串, 根据策略，进行刷新
    class Logger
    {
    public:
        Logger()
        {
            // 默认采用ConsoleLogStrategy策略
            _strategy = std::make_shared<ConsoleLogStrategy>();
        }
        void EnableConsoleLog()
        {
            _strategy = std::make_shared<ConsoleLogStrategy>();
        }
        void EnableFileLog()
        {
            _strategy = std::make_shared<FileLogStrategy>();
        }
        ~Logger() {}
        // 一条完整的信息: [2024-08-04 12:27:03] [DEBUG] [202938] [main.cc] [16] + 日志的可变部分(<< "hello world" << 3.14 << a << b;)
        class LogMessage
        {
        public:
            LogMessage(LogLevel level, const std::string &filename, int line, Logger &logger)
                : _currtime(CurrentTime()),
                  _level(level),
                  _pid(::getpid()),
                  _filename(filename),
                  _line(line),
                  _logger(logger)
            {
                std::stringstream ssbuffer;
                ssbuffer << "[" << _currtime << "] "
                         << "[" << Level2String(_level) << "] "
                         << "[" << _pid << "] "
                         << "[" << _filename << "] "
                         << "[" << _line << "] - ";
                _loginfo = ssbuffer.str();
            }
            template <typename T>
            LogMessage &operator<<(const T &info)
            {
                std::stringstream ss;
                ss << info;
                _loginfo += ss.str();
                return *this;
            }

            ~LogMessage()
            {
                if (_logger._strategy)
                {
                    _logger._strategy->SyncLog(_loginfo);
                }
            }

        private:
            std::string _currtime; // 当前日志的时间
            LogLevel _level;       // 日志等级
            pid_t _pid;            // 进程pid
            std::string _filename; // 源文件名称
            int _line;             // 日志所在的行号
            Logger &_logger;       // 负责根据不同的策略进行刷新
            std::string _loginfo;  // 一条完整的日志记录
        };

        // 就是要拷贝,故意的拷贝
        LogMessage operator()(LogLevel level, const std::string &filename, int line)
        {
            return LogMessage(level, filename, line, *this);
        }

    private:
        std::shared_ptr<LogStrategy> _strategy; // 日志刷新的策略方案
    };

    Logger logger;

#define LOG(Level) logger(Level, __FILE__, __LINE__)
#define ENABLE_CONSOLE_LOG() logger.EnableConsoleLog()
#define ENABLE_FILE_LOG() logger.EnableFileLog()
}
Main.cc
#include "Log.hpp"

using namespace LogMudule;

int main()
{
    ENABLE_FILE_LOG();

    LOG(LogLevel::DEBUG) << "hello file";
    LOG(LogLevel::DEBUG) << "hello file";
    LOG(LogLevel::DEBUG) << "hello file";
    LOG(LogLevel::DEBUG) << "hello file";


    ENABLE_CONSOLE_LOG();
    LOG(LogLevel::DEBUG) << "hello world";
    LOG(LogLevel::DEBUG) << "hello world";
    LOG(LogLevel::DEBUG) << "hello world";
    LOG(LogLevel::DEBUG) << "hello world";
    return 0;
}

ThreadPool

threadpool.hpp
#pragma once

#include <iostream>
#include <string>
#include <queue>
#include <vector>
#include <memory>
#include "Log.hpp"
#include "Mutex.hpp"
#include "Cond.hpp"
#include "Thread.hpp"

namespace ThreadPoolModule
{
    using namespace LogMudule;
    using namespace ThreadModule;
    using namespace LockModule;
    using namespace CondModule;

    // 用来做测试的线程方法
    void DefaultTest()
    {
        while (true)
        {
            LOG(LogLevel::DEBUG) << "我是一个测试方法";
            sleep(1);
        }
    }

    using thread_t = std::shared_ptr<Thread>;

    const static int defaultnum = 5;

    template <typename T>
    class ThreadPool
    {
    private:
        bool IsEmpty() { return _taskq.empty(); }

        void HandlerTask(std::string name)
        {
            LOG(LogLevel::INFO) << "线程: " << name << ", 进入HandlerTask的逻辑";
            while (true)
            {
                // 1. 拿任务
                T t;
                {
                    LockGuard lockguard(_lock);
                    while (IsEmpty() && _isrunning)
                    {
                        _wait_num++;
                        _cond.Wait(_lock);
                        _wait_num--;
                    }
                    // 2. 任务队列为空 && 线程池退出了
                    if(IsEmpty() && !_isrunning)
                        break;

                    t = _taskq.front();
                    _taskq.pop();

                }

                // 2. 处理任务
                t(name); // 规定，未来所有的任务处理，全部都是必须提供()方法！
            }
            LOG(LogLevel::INFO) << "线程: " << name << " 退出";
        }

    public:
        ThreadPool(int num = defaultnum) : _num(num), _wait_num(0), _isrunning(false)
        {
            for (int i = 0; i < _num; i++)
            {
                _threads.push_back(std::make_shared<Thread>(std::bind(&ThreadPool::HandlerTask, this, std::placeholders::_1)));
                LOG(LogLevel::INFO) << "构建线程" << _threads.back()->Name() << "对象 ... 成功";
            }
        }
        void Equeue(T &&in)
        {
            LockGuard lockguard(_lock);
            if(!_isrunning) return;
            _taskq.push(std::move(in));
            if(_wait_num > 0)
                _cond.Notify();
        }
        void Start()
        {
            if(_isrunning) return;
            _isrunning = true; // bug fix??
            for (auto &thread_ptr : _threads)
            {
                LOG(LogLevel::INFO) << "启动线程" << thread_ptr->Name() << " ... 成功";
                thread_ptr->Start();
            }
        }
        void Wait()
        {
            for (auto &thread_ptr : _threads)
            {
                thread_ptr->Join();
                LOG(LogLevel::INFO) << "回收线程" << thread_ptr->Name() << " ... 成功";
            }
        }
        void Stop()
        {
            LockGuard lockguard(_lock);
            if(_isrunning)
            {
                // 3. 不能在入任务了
                _isrunning = false; // 不工作
                // 1. 让线程自己退出(要唤醒) && // 2. 历史的任务被处理完了
                if(_wait_num>0)
                    _cond.NotifyAll();
            }
        }
        ~ThreadPool()
        {
        }

    private:
        std::vector<thread_t> _threads;
        int _num;
        int _wait_num;
        std::queue<T> _taskq; // 临界资源

        Mutex _lock;
        Cond _cond;

        bool _isrunning;
    };
}
threadpood.cc
#include "ThreadPool.hpp"
#include "Task.hpp"
#include <memory>

using namespace ThreadPoolModule;

int main()
{
    ENABLE_CONSOLE_LOG();
    // ENABLE_FILE_LOG();

    std::unique_ptr<ThreadPool<task_t>> tp = std::make_unique<ThreadPool<task_t>>();
    tp->Start();

    int cnt = 10;
    char c;
    while (true)
    {
        std::cin >> c;
        tp->Equeue(Push);
        // cnt--;
        // sleep(1);
    }

    tp->Stop();

    sleep(3);

    tp->Wait();

    return 0;
}
task.hpp
#pragma once

#include <iostream>
#include <string>
#include <functional>
#include "Log.hpp"

using namespace LogMudule;

using task_t = std::function<void(std::string name)>;

void Push(std::string name)
{
    LOG(LogLevel::DEBUG) << "我是一个推送数据到服务器的一个任务, 我正在被执行" << "[" << name << "]";
}

sigThreadPool

threadpool.hpp
#pragma once

#include <iostream>
#include <string>
#include <queue>
#include <vector>
#include <memory>
#include "Log.hpp"
#include "Mutex.hpp"
#include "Cond.hpp"
#include "Thread.hpp"

namespace ThreadPoolModule
{
    using namespace LogMudule;
    using namespace ThreadModule;
    using namespace LockModule;
    using namespace CondModule;

    // 用来做测试的线程方法
    void DefaultTest()
    {
        while (true)
        {
            LOG(LogLevel::DEBUG) << "我是一个测试方法";
            sleep(1);
        }
    }

    using thread_t = std::shared_ptr<Thread>;

    const static int defaultnum = 5;

    template <typename T>
    class ThreadPool
    {
    private:
        bool IsEmpty() { return _taskq.empty(); }

        void HandlerTask(std::string name)
        {
            LOG(LogLevel::INFO) << "线程: " << name << ", 进入HandlerTask的逻辑";
            while (true)
            {
                // 1. 拿任务
                T t;
                {
                    LockGuard lockguard(_lock);
                    while (IsEmpty() && _isrunning)
                    {
                        _wait_num++;
                        _cond.Wait(_lock);
                        _wait_num--;
                    }
                    // 2. 任务队列为空 && 线程池退出了
                    if (IsEmpty() && !_isrunning)
                        break;

                    t = _taskq.front();
                    _taskq.pop();
                }

                // 2. 处理任务
                t(name); // 规定，未来所有的任务处理，全部都是必须提供()方法！
            }
            LOG(LogLevel::INFO) << "线程: " << name << " 退出";
        }
        ThreadPool(const ThreadPool<T> &) = delete;
        ThreadPool<T> &operator=(const ThreadPool<T> &) = delete;

        ThreadPool(int num = defaultnum) : _num(num), _wait_num(0), _isrunning(false)
        {
            for (int i = 0; i < _num; i++)
            {
                _threads.push_back(std::make_shared<Thread>(std::bind(&ThreadPool::HandlerTask, this, std::placeholders::_1)));
                LOG(LogLevel::INFO) << "构建线程" << _threads.back()->Name() << "对象 ... 成功";
            }
        }

    public:
        static ThreadPool<T> *getInstance()
        {
	    if(instance == NULL)
            {
	        LockGuard lockguard(mutex);
                if(instance == NULL)
                {
                    LOG(LogLevel::INFO) << "单例首次被执行，需要加载对象...";
                    instance = new ThreadPool<T>();
                }
	    }

            return instance;
        }

        void Equeue(T &&in)
        {
            LockGuard lockguard(_lock);
            if (!_isrunning)
                return;
            _taskq.push(std::move(in));
            if (_wait_num > 0)
                _cond.Notify();
        }
        void Start()
        {
            if (_isrunning)
                return;
            _isrunning = true; // bug fix??
            for (auto &thread_ptr : _threads)
            {
                LOG(LogLevel::INFO) << "启动线程" << thread_ptr->Name() << " ... 成功";
                thread_ptr->Start();
            }
        }
        void Wait()
        {
            for (auto &thread_ptr : _threads)
            {
                thread_ptr->Join();
                LOG(LogLevel::INFO) << "回收线程" << thread_ptr->Name() << " ... 成功";
            }
        }
        void Stop()
        {
            LockGuard lockguard(_lock);
            if (_isrunning)
            {
                // 3. 不能在入任务了
                _isrunning = false; // 不工作
                // 1. 让线程自己退出(要唤醒) && // 2. 历史的任务被处理完了
                if (_wait_num > 0)
                    _cond.NotifyAll();
            }
        }
        ~ThreadPool()
        {
        }

    private:
        std::vector<thread_t> _threads;
        int _num;
        int _wait_num;
        std::queue<T> _taskq; // 临界资源

        Mutex _lock;
        Cond _cond;

        bool _isrunning;

        static ThreadPool<T> *instance;
	static Mutex mutex; //只用来保护单例
    };

    template<typename T>
    ThreadPool<T> *ThreadPool<T>::instance = NULL;
    template<typename T>
    Mutex ThreadPool<T>::mutex; //只用来保护单例
}
threadpool.cc
#include "ThreadPool.hpp"
#include "Task.hpp"
#include <memory>

using namespace ThreadPoolModule;

int main()
{
    ENABLE_CONSOLE_LOG();
    ThreadPool<task_t>::getInstance()->Start();
    char c;
    int cnt = 5;
    while (cnt)
    {
        // std::cin >> c;
        ThreadPool<task_t>::getInstance()->Equeue(Push);
        cnt--;
        sleep(1);
    }

    ThreadPool<task_t>::getInstance()->Stop();
    ThreadPool<task_t>::getInstance()->Wait();





    // ENABLE_FILE_LOG();

    // std::unique_ptr<ThreadPool<task_t>> tp = std::make_unique<ThreadPool<task_t>>();
    // tp->Start();

    // int cnt = 10;
    // char c;
    // while (true)
    // {
    //     std::cin >> c;
    //     tp->Equeue(Push);
    //     // cnt--;
    //     // sleep(1);
    // }

    // tp->Stop();

    // sleep(3);

    // tp->Wait();

    return 0;
}

板书笔记

几乎没有，就不展示了


http://www.kler.cn/a/468123.html

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