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CppDemo1
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add log file output

This commit is contained in:
czzhangheng 2025-07-09 16:02:28 +08:00
parent 9bae918829
commit 2d9f3effda
16 changed files with 2507 additions and 22 deletions
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.DS_Store vendored Normal file
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28
.vscode/tasks.json vendored Normal file
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@ -0,0 +1,28 @@
{
"tasks": [
{
"type": "cppbuild",
"label": "C/C++: g++ 生成活动文件",
"command": "/usr/bin/g++",
"args": [
"-fdiagnostics-color=always",
"-g",
"${file}",
"-o",
"${fileDirname}/${fileBasenameNoExtension}"
],
"options": {
"cwd": "${fileDirname}"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "build",
"isDefault": true
},
"detail": "调试器生成的任务。"
}
],
"version": "2.0.0"
}

68
Logger.h
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@ -15,7 +15,8 @@
#include <sstream>
#include <vector>
#include <stdexcept>
#include <memory>
#include <iostream>
//辅助函数，多个参数转化字符串
@ -74,33 +75,67 @@ enum class Loglevel {
ERROR
};
class Logger {
// 日志输出抽象基类
class LogOutput {
public:
Logger(const std::string& filename) : log_file_(filename, std::ios::out | std::ios::app)
, exit_flag_(false) {
if (!log_file_.is_open()) {
virtual ~LogOutput() = default;
virtual void write(const std::string& msg) = 0;
};
// 文件输出
class FileOutput : public LogOutput {
public:
FileOutput(const std::string& filename) : file_(filename, std::ios::out | std::ios::app) {
if (!file_.is_open()) {
throw std::runtime_error("Failed to open log file");
}
}
void write(const std::string& msg) override {
file_ << msg << std::endl;
}
~FileOutput() {
if (file_.is_open()) file_.close();
}
private:
std::ofstream file_;
};
// 控制台输出
class ConsoleOutput : public LogOutput {
public:
void write(const std::string& msg) override {
std::cout << msg << std::endl;
}
};
// 网络输出（示例，实际实现需补充）
class NetworkOutput : public LogOutput {
public:
void write(const std::string& msg) override {
// 这里可以实现网络发送逻辑
// 示例：std::cout << "[Network] " << msg << std::endl;
}
};
class Logger {
public:
// 通过unique_ptr传入多态输出对象
Logger(std::unique_ptr<LogOutput> output_obj)
: output_obj_(std::move(output_obj)), exit_flag_(false) {
worker_thread_ = std::thread([this]() {
std::string msg;
while (log_queue_.pop(msg)) {
log_file_ << msg << std::endl;
output_obj_->write(msg);
}
});
};
}
~Logger() {
exit_flag_ = true;
log_queue_.shutdown();
//如果日志结束了，说明主线程退出，这里是优雅退出，等待其他主线程
if (worker_thread_.joinable()) {
worker_thread_.join();
}
if (log_file_.is_open()) {
log_file_.close();
}
};
template<typename ... Args>
void log(Loglevel loglevel, const std::string& format, Args&& ...args) {
@ -120,11 +155,10 @@ public:
break;
}
log_queue_.push(level_str + formatMessage(format, std::forward<Args>(args)...));
};
}
private:
std::string GetTimeStamp() {
static std::string GetTimeStamp() {
std::time_t now = std::time(nullptr);
std::tm* local_time = std::localtime(&now);
char buffer[80];
@ -148,14 +182,12 @@ private:
oss << arg_strings[arg_index];
} else {
oss << "{}";
//如果占位符没有对应参数，保留占位符
}
arg_strings[arg_index++];
pos = placeholder + 2;
placeholder = format.find("{}", pos);
}
oss << format.substr(pos);
while (arg_index < arg_strings.size()) {
oss << arg_strings[arg_index++];
@ -165,7 +197,7 @@ private:
LogQueue log_queue_;
std::thread worker_thread_;
std::ofstream log_file_;
std::unique_ptr<LogOutput> output_obj_; // 多态输出对象
std::atomic<bool> exit_flag_;
};

161
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cmake-build-debug/Testing/Temporary/LastTest.log
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@ -1,3 +1,3 @@
Start testing: Jul 09 14:56 CST
Start testing: Jul 09 16:01 CST
----------------------------------------------------------
End testing: Jul 09 14:56 CST
End testing: Jul 09 16:01 CST

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cmake-build-debug/log.txt Normal file
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@ -0,0 +1,9 @@
[INFO] 2025-07-09 14:56:25 User 42 performed login in 2.333 seconds
[DEBUG] 2025-07-09 14:56:25 Hello World
[WARNING] 2025-07-09 14:56:25 This is a log message.
[ERROR] 2025-07-09 14:56:25 Multiple placeholders : 1, 2, 3
[INFO] 2025-07-09 15:08:38 User 42 performed login in 2.333 seconds
[DEBUG] 2025-07-09 15:08:38 Hello World
[WARNING] 2025-07-09 15:08:38 This is a log message.
[ERROR] 2025-07-09 15:08:38 Multiple placeholders : 1, 2, 3

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main.cpp
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@ -4,7 +4,8 @@
int main() {
try {
Logger logger("log.txt");
Logger logger(std::make_unique<ConsoleOutput>());
//Logger logger(std::make_unique<FileOutput>("log.txt"));
int id = 42;
std::string action = "login";
double duration = 2.333;

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