spdlog/include/c11log/logger.h

202 lines
5.4 KiB
C++

#pragma once
// Thread safe logger
// Has name, log level, vector of std::shared sink pointers and formatter
// Upon each log write the logger:
// 1. Checks if its log level is enough to log the message
// 2. Format the message using the formatter function
// 3. Pass the formatted message to its sinks to performa the actual logging
#include<vector>
#include<memory>
#include<atomic>
#include <sstream>
#include "sinks/base_sink.h"
#include "common.h"
#include "formatter.h"
#include "details/pattern_formatter.h"
namespace c11log
{
namespace details
{
class line_logger;
}
class logger
{
public:
using sink_ptr = std::shared_ptr<sinks::sink>;
using formatter_ptr = std::shared_ptr<c11log::formatter>;
logger(const std::string& name, std::initializer_list<sink_ptr>, formatter_ptr formatter = nullptr);
template<class It>
logger(const std::string& name, const It& begin, const It& end);
logger(const logger&) = delete;
logger& operator=(const logger&) = delete;
void level(level::level_enum);
level::level_enum level() const;
const std::string& name() const;
bool should_log(level::level_enum) const;
void formatter(formatter_ptr);
formatter_ptr formatter() const;
template <typename... Args> details::line_logger log(level::level_enum lvl, const Args&... args);
template <typename... Args> details::line_logger trace(const Args&... args);
template <typename... Args> details::line_logger debug(const Args&... args);
template <typename... Args> details::line_logger info(const Args&... args);
template <typename... Args> details::line_logger warn(const Args&... args);
template <typename... Args> details::line_logger error(const Args&... args);
template <typename... Args> details::line_logger critical(const Args&... args);
private:
friend details::line_logger;
std::string _name;
formatter_ptr _formatter;
std::vector<sink_ptr> _sinks;
std::atomic_int _level;
void _variadic_log(details::line_logger& l);
template <typename First, typename... Rest>
void _variadic_log(details::line_logger&l, const First& first, const Rest&... rest);
void _log_msg(details::log_msg& msg);
formatter_ptr _default_formatter();
const char* _default_pattern = "[%Y:%m:%d %H:%M:%S.%e] [%n:%l] %t";
};
}
//
// trace & debug macros
//
#ifdef FFLOG_ENABLE_TRACE
#define FFLOG_TRACE(logger, ...) logger->log(c11log::level::TRACE, __FILE__, " #", __LINE__,": " __VA_ARGS__)
#else
#define FFLOG_TRACE(logger, ...) {}
#endif
#ifdef FFLOG_ENABLE_DEBUG
#define FFLOG_DEBUG(logger, ...) logger->log(c11log::level::DEBUG, __VA_ARGS__)
#else
#define FFLOG_DEBUG(logger, ...) {}
#endif
//
// Logger implementation
//
#include "details/line_logger.h"
inline c11log::logger::logger(const std::string& logger_name, std::initializer_list<sink_ptr> sinks_list, formatter_ptr msg_formatter) :
_name(logger_name),
_formatter(msg_formatter),
_sinks(sinks_list)
{
if (!msg_formatter) //default formatter
_formatter = std::make_shared<details::pattern_formatter>(_default_pattern);
// no support under vs2013 for member initialization for std::atomic
_level = level::INFO;
}
template<class It>
inline c11log::logger::logger(const std::string& logger_name, const It& begin, const It& end):
_name(logger_name),
_sinks(begin, end)
{}
template <typename... Args>
inline c11log::details::line_logger c11log::logger::log(level::level_enum lvl, const Args&... args) {
bool msg_enabled = should_log(lvl);
details::line_logger l(this, lvl, msg_enabled);
if (msg_enabled)
_variadic_log(l, args...);
return l;
}
template <typename... Args>
inline c11log::details::line_logger c11log::logger::trace(const Args&... args)
{
return log(level::TRACE, args...);
}
template <typename... Args>
inline c11log::details::line_logger c11log::logger::debug(const Args&... args)
{
return log(level::DEBUG, args...);
}
template <typename... Args>
inline c11log::details::line_logger c11log::logger::info(const Args&... args)
{
return log(level::INFO, args...);
}
template <typename... Args>
inline c11log::details::line_logger c11log::logger::warn(const Args&... args)
{
return log(level::WARNING, args...);
}
template <typename... Args>
inline c11log::details::line_logger c11log::logger::critical(const Args&... args)
{
return log(level::CRITICAL, args...);
}
inline const std::string& c11log::logger::name() const
{
return _name;
}
inline void c11log::logger::level(c11log::level::level_enum log_level)
{
_level.store(log_level);
}
inline c11log::level::level_enum c11log::logger::level() const
{
return static_cast<c11log::level::level_enum>(_level.load());
}
inline bool c11log::logger::should_log(c11log::level::level_enum msg_level) const
{
return msg_level >= _level.load();
}
inline void c11log::logger::formatter(formatter_ptr msg_formatter)
{
_formatter = msg_formatter;
}
inline c11log::logger::formatter_ptr c11log::logger::formatter() const
{
return _formatter;
}
inline void c11log::logger::_variadic_log(c11log::details::line_logger&) {}
template <typename First, typename... Rest>
void c11log::logger::_variadic_log(c11log::details::line_logger& l, const First& first, const Rest&... rest)
{
l.write(first);
_variadic_log(l, rest...);
}
inline void c11log::logger::_log_msg(details::log_msg& msg)
{
_formatter->format(msg);
for (auto &sink : _sinks)
sink->log(msg);
}