boost log 在项目中的应用.

这个是我自己写的一个类.

#pragma once#include <string>#include <boost/log/trivial.hpp>using std::string;#define LOG_DEBUG\    BOOST_LOG_SEV((MyLog::s_slg),(boost::log::trivial::debug))#define LOG_INFO\    BOOST_LOG_SEV((MyLog::s_slg),(boost::log::trivial::info))#define LOG_ERROR\    BOOST_LOG_SEV((MyLog::s_slg),(boost::log::trivial::error))#define LOG_WARNING\    BOOST_LOG_SEV((MyLog::s_slg),(boost::log::trivial::warning))// 在使用之前必须先调用 init// 使用方式  LOG_DEBUG<<"test string";// 也可以用boost 中的宏  BOOST_LOG_TRIVIAL(info)<<"test msg";class MyLog{public:  MyLog();  ~MyLog(void);   // 在使用之前必须先调用此函数  static void Init(const string & dir);  static void Log(const string & msg );  static boost::log::sources::severity_logger<boost::log::trivial::severity_level > s_slg;protected:private:};

#include "MyLog.h"#include <iostream>#include <string>#include <boost/filesystem.hpp>#include <boost/log/sources/logger.hpp>#include <boost/log/sources/record_ostream.hpp>#include <boost/log/sources/global_logger_storage.hpp>#include <boost/log/utility/setup/file.hpp>#include <boost/log/utility/setup/common_attributes.hpp>#include <boost/log/sinks/text_ostream_backend.hpp>#include <boost/log/attributes/named_scope.hpp>#include <boost/log/expressions.hpp>#include <boost/log/support/date_time.hpp>#include <boost/log/detail/format.hpp>#include <boost/log/detail/thread_id.hpp>namespace logging = boost::log;namespace src = boost::log::sources;namespace keywords = boost::log::keywords;namespace sinks = boost::log::sinks;namespace expr = boost::log::expressions;BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(my_logger, src::logger_mt)boost::log::sources::severity_logger<boost::log::trivial::severity_level > MyLog::s_slg;MyLog::MyLog(){}MyLog::~MyLog(void){ }void MyLog::Init(const string & dir){  if (boost::filesystem::exists(dir) == false)  {    boost::filesystem::create_directories(dir);  }  auto pSink = logging::add_file_log  (      keywords::open_mode = std::ios::app,      keywords::file_name = dir + "/%Y%m%d.log",      keywords::rotation_size = 10 * 1024 * 1024,      keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0),       //keywords::format = "[%TimeStamp% %ThreadID%]: %Message%"      keywords::format =      (        expr::stream        << "[" <<expr::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d %H:%M:%S.%f")        << " " << expr::attr< boost::log::aux::thread::id >("ThreadID")        << " " << logging::trivial::severity        << "] " << expr::smessage      )  );  // 如果不写这个 它不会实时的把日志写下去, 而是等待缓冲区满了,或者程序正常退出时写下,这样做的好处是减少IO操作.提高效率,  不过我这里不需要它. 因为我的程序可能会异常退出.  pSink->locked_backend()->auto_flush(true);//使日志实时更新  //pSink->imbue(std::locale("zh_CN.UTF-8")); // 本地化   logging::add_common_attributes();}void MyLog::Log(const string & msg ){  src::logger lg;  BOOST_LOG(lg) << msg;}