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#pragma once
#include <mutex>
#include "./base_sink.h"
#include "../details/null_mutex.h"
#include "../details/file_helper.h"
#include "../details/fast_oss.h"
namespace spdlog
{
namespace sinks
{
/*
* Trivial file sink with single file as target
*/
template<class Mutex>
class simple_file_sink : public base_sink<Mutex>
{
public:
explicit simple_file_sink(const std::string &filename,
const std::size_t flush_inverval=0):
_file_helper(flush_inverval)
{
_file_helper.open(filename);
}
protected:
void _sink_it(const details::log_msg& msg) override
{
_file_helper.write(msg);
}
private:
details::file_helper _file_helper;
};
typedef simple_file_sink<std::mutex> simple_file_sink_mt;
typedef simple_file_sink<details::null_mutex> simple_file_sink_st;
/*
* Rotating file sink based on size
*/
template<class Mutex>
class rotating_file_sink : public base_sink<Mutex>
{
public:
rotating_file_sink(const std::string &base_filename, const std::string &extension,
const std::size_t max_size, const std::size_t max_files,
const std::size_t flush_inverval=0):
_base_filename(base_filename),
_extension(extension),
_max_size(max_size),
_max_files(max_files),
_current_size(0),
_file_helper(flush_inverval)
{
_file_helper.open(calc_filename(_base_filename, 0, _extension));
}
protected:
void _sink_it(const details::log_msg& msg) override
{
_current_size += msg.formatted.size();
if (_current_size > _max_size)
{
_rotate();
_current_size = msg.formatted.size();
}
_file_helper.write(msg);
}
private:
static std::string calc_filename(const std::string& filename, std::size_t index, const std::string& extension)
{
details::fast_oss oss;
if (index)
oss << filename << "." << index << "." << extension;
else
oss << filename << "." << extension;
return oss.str();
}
// Rotate files:
// log.txt -> log.1.txt
// log.1.txt -> log2.txt
// log.2.txt -> log3.txt
// log.3.txt -> delete
void _rotate()
{
_file_helper.close();
for (auto i = _max_files; i > 0; --i)
{
std::string src = calc_filename(_base_filename, i - 1, _extension);
std::string target = calc_filename(_base_filename, i, _extension);
if (details::file_helper::file_exists(target))
std::remove(target.c_str());
if (details::file_helper::file_exists(src) && std::rename(src.c_str(), target.c_str()))
{
throw fflog_exception("rotating_file_sink: failed renaming " + src + " to " + target);
}
}
auto cur_name = _file_helper.filename();
std::remove(cur_name.c_str());
_file_helper.open(cur_name);
}
std::string _base_filename;
std::string _extension;
std::size_t _max_size;
std::size_t _max_files;
std::size_t _current_size;
details::file_helper _file_helper;
};
typedef rotating_file_sink<std::mutex> rotating_file_sink_mt;
typedef rotating_file_sink<details::null_mutex>rotating_file_sink_st;
/*
* Rotating file sink based on date. rotates at midnight
*/
template<class Mutex>
class daily_file_sink:public base_sink<Mutex>
{
public:
explicit daily_file_sink(const std::string& base_filename,
const std::string& extension,
const std::size_t flush_inverval=0):
_base_filename(base_filename),
_extension(extension),
_midnight_tp (_calc_midnight_tp() ),
_file_helper(flush_inverval)
{
_file_helper.open(calc_filename(_base_filename, _extension));
}
protected:
void _sink_it(const details::log_msg& msg) override
{
if (std::chrono::system_clock::now() >= _midnight_tp)
{
_file_helper.close();
_file_helper.open(calc_filename(_base_filename, _extension));
_midnight_tp = _calc_midnight_tp();
}
_file_helper.write(msg);
}
private:
// Return next midnight's time_point
static std::chrono::system_clock::time_point _calc_midnight_tp()
{
using namespace std::chrono;
auto now = system_clock::now();
time_t tnow = std::chrono::system_clock::to_time_t(now);
tm date = spdlog::details::os::localtime(tnow);
date.tm_hour = date.tm_min = date.tm_sec = 0;
auto midnight = std::chrono::system_clock::from_time_t(std::mktime(&date));
return system_clock::time_point(midnight + hours(24));
}
//Create filename for the form basename.YYYY-MM-DD.extension
static std::string calc_filename(const std::string& basename, const std::string& extension)
{
std::tm tm = spdlog::details::os::localtime();
details::fast_oss oss;
oss << basename << '.';
oss << tm.tm_year + 1900 << '-' << std::setw(2) << std::setfill('0') << tm.tm_mon + 1 << '-' << tm.tm_mday;
oss << '.' << extension;
return oss.str();
}
std::string _base_filename;
std::string _extension;
std::chrono::system_clock::time_point _midnight_tp;
details::file_helper _file_helper;
};
typedef daily_file_sink<std::mutex> daily_file_sink_mt;
typedef daily_file_sink<details::null_mutex> daily_file_sink_st;
}
}
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