103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
// logger.cpp
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#include "logger.hpp"
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#include <iomanip>
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#include <ctime>
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#include <fstream>
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#include <cstdio>
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std::ofstream Logger::log_file;
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std::string Logger::current_log_filename;
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void Logger::set_log_to_file(const std::string &filename)
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{
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current_log_filename = filename;
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log_file.open(filename, std::ios::app);
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if (!log_file.is_open())
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{
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std::cerr << "[Logger] Failed to open log file: " << filename << std::endl;
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}
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}
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std::string Logger::get_time_string()
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{
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using namespace std::chrono;
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// 获取当前时间点
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auto now = system_clock::now();
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auto ms = duration_cast<milliseconds>(now.time_since_epoch()) % 1000;
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// 转换为 time_t（秒）
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auto t = system_clock::to_time_t(now);
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std::tm ltm = *std::localtime(&t);
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// 拼接格式化字符串
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std::ostringstream oss;
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oss << std::put_time(<m, "%Y-%m-%d %H:%M:%S")
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<< '.' << std::setw(3) << std::setfill('0') << ms.count();
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return oss.str();
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}
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void Logger::log(LogLevel level, const std::string &msg)
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{
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std::string level_str;
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switch (level)
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{
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case LogLevel::INFO:
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level_str = "[INFO] ";
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break;
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case LogLevel::WARN:
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level_str = "[WARN] ";
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break;
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case LogLevel::ERROR:
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level_str = "[ERROR]";
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break;
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}
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std::string full_msg = get_time_string() + " " + level_str + " " + msg;
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std::cout << full_msg << std::endl;
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if (log_file.is_open())
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{
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log_file << full_msg << std::endl;
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log_file.flush();
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// 检查是否需要轮转
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if (get_file_size(current_log_filename) >= MAX_LOG_FILE_SIZE)
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{
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rotate_logs();
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}
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}
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}
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size_t Logger::get_file_size(const std::string &filename)
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{
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std::ifstream in(filename, std::ifstream::ate | std::ifstream::binary);
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return in.is_open() ? static_cast<size_t>(in.tellg()) : 0;
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}
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void Logger::rotate_logs()
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{
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log_file.close();
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// 删除最旧的日志
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std::string oldest = current_log_filename + "." + std::to_string(MAX_LOG_BACKUP_COUNT);
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std::remove(oldest.c_str());
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// 重命名 *.4 -> *.5, ..., *.1 -> *.2
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for (int i = MAX_LOG_BACKUP_COUNT - 1; i >= 1; --i)
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{
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std::string old_name = current_log_filename + "." + std::to_string(i);
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std::string new_name = current_log_filename + "." + std::to_string(i + 1);
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std::rename(old_name.c_str(), new_name.c_str());
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}
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// 当前日志 -> .1
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std::string first_backup = current_log_filename + ".1";
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std::rename(current_log_filename.c_str(), first_backup.c_str());
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// 重新打开新日志
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log_file.open(current_log_filename, std::ios::trunc);
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}
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