c++日志工具spdLog

#include <cstdio>
#include <iostream>
#include "spdlog/spdlog.h"
#include "spdlog/sinks/stdout_color_sinks.h" // or "../stdout_sinks.h" if no color needed
#include "spdlog/sinks/basic_file_sink.h"
#include "spdlog/sinks/rotating_file_sink.h"
 
void err_handler_example()
{
  spdlog::set_error_handler([](const std::string& msg){printf("*****Custom log error handler, %s*****%\n", msg.c_str());});
}
 
int main(int , char *[])
{
  try 
  {
    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
    console_sink->set_level(spdlog::level::debug);
    console_sink->set_pattern("%^[%Y-%m-%d %H:%M:%S:%e] [%n] [%t] [%l] %v%$");
 
    //auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", false);
    auto file_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>("logs/multisink.txt", 1048576, 3);
    file_sink->set_pattern("[%Y-%m-%d %H:%M:%S:%e] [%n] [%t] [%l] %v");
    file_sink->set_level(spdlog::level::debug);
 
    std::vector<spdlog::sink_ptr> sinks;
    sinks.push_back(console_sink);
    sinks.push_back(file_sink);
    
    //spdlog::logger *logger = new spdlog::logger("multi_sink", {console_sink, file_sink});
    auto logger = std::make_shared<spdlog::logger>("multi_sink", begin( sinks ), end( sinks ));
    //logger->set_level(spdlog::level::debug);
 
#if 0  //也可以使用这种方式
  
    spdlog::sinks_init_list sink_list = { console_sink->sinks().front(), file_sink->sinks().front() };
    //创建一个新的日志对象，以上面两个日志对象作为初始化参数，即实现了同时输出 console 和 file
    auto log_ptr = spdlog::create("loggername", sink_list);
 
    spdlog::register_logger( combined_logger );
#endif
    err_handler_example();
    
    logger->warn("this should appear in both console and file");
 
    logger->info("this message should appear in file , not in console");
 
    //注册到spdlog里
    spdlog::register_logger(logger);
      
    auto test_logger = spdlog::get("multi_sink");
    test_logger->info("getlogger::helloworld");
 
    std::string msg = "hello world 2019.";
    logger->warn("spdlog: {}", msg);
 
 
 
    auto rotating_logger = spdlog::rotating_logger_mt("log_rotating", "logs/rotating.txt", 256, 2);
        for (int i = 0; i < 10; ++i)
            rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);
    
  }
  catch (const spdlog::spdlog_ex &ex)
  {
    std::cout<<"Log initialization faild"<<ex.what()<<std::endl;
  }
 
}