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321 lines
10 KiB
C++
321 lines
10 KiB
C++
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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#pragma once
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#include <spdlog/common.h>
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#include <spdlog/details/file_helper.h>
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#include <spdlog/details/null_mutex.h>
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#include <spdlog/fmt/fmt.h>
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#include <spdlog/sinks/base_sink.h>
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#include <spdlog/details/os.h>
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#include <spdlog/details/circular_q.h>
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#include <spdlog/details/synchronous_factory.h>
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#include <chrono>
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#include <cstdio>
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#include <ctime>
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#include <mutex>
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#include <string>
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extern std::array<const char *, 7> spdlog::details::days;
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extern std::array<const char *, 7> spdlog::details::full_days;
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extern const std::array<const char *, 12> spdlog::details::months;
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extern const std::array<const char *, 12> spdlog::details::full_months;
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namespace spdlog {
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namespace sinks {
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/*
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* Generator of daily log file names in format basename.YYYY-MM-DD.ext
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*/
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struct daily_filename_calculator
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{
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// Create filename for the form basename.YYYY-MM-DD
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static filename_t calc_filename(const filename_t &filename, const tm &now_tm)
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{
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filename_t basename, ext;
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std::tie(basename, ext) = details::file_helper::split_by_extension(filename);
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return fmt::format(
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SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}{}"), basename, now_tm.tm_year + 1900, now_tm.tm_mon + 1, now_tm.tm_mday, ext);
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}
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// Create formatting filename for the form basename.
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static filename_t calc_filename_fmt(const filename_t &filename, const tm &now_tm)
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{
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filename_t dest = "";
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int total_minutes;
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for (size_t i = 0; i < filename.size (); ++i)
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{
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if (filename [i] == '%') {
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if (i == filename.size () - 1)
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throw_spdlog_ex("daily_file_sink: Invalid format");
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i += 1;
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char ch = filename [i];
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switch (ch)
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{
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case 'a':
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dest += spdlog::details::days[static_cast<size_t>(now_tm.tm_wday)];
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break;
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case 'A':
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dest += spdlog::details::full_days[static_cast<size_t>(now_tm.tm_wday)];
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break;
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case 'b':
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dest += spdlog::details::months[static_cast<size_t>(now_tm.tm_mon)];
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break;
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case 'B':
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dest += spdlog::details::full_months[static_cast<size_t>(now_tm.tm_mon)];
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break;
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case 'c':
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dest += calc_filename_fmt("%a %b %d %H:%M:%S %Y", now_tm);
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break;
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case 'C':
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dest += fmt::format ("{}", (now_tm.tm_year + 1900) % 100);
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break;
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case 'Y':
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dest += fmt::format ("{}", now_tm.tm_year + 1900);
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break;
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case 'D':
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case 'x':
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dest += calc_filename_fmt("%m %d %C", now_tm);
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break;
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case 'm':
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dest += fmt::format ("{:02}", now_tm.tm_mon + 1);
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break;
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case 'd':
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dest += fmt::format ("{:02}", now_tm.tm_mday);
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break;
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case 'H':
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dest += fmt::format ("{:02}", now_tm.tm_hour);
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break;
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case 'I':
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dest += fmt::format ("{:02}", (now_tm.tm_hour % 12) == 0 ? 12 : (now_tm.tm_hour % 12));
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break;
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case 'M':
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dest += fmt::format ("{:02}", now_tm.tm_min);
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break;
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case 'S':
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dest += fmt::format ("{:02}", now_tm.tm_sec);
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break;
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case 'p':
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dest += (now_tm.tm_hour >= 1 && now_tm.tm_hour <= 12 ? "AM" : "PM");
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break;
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case 'r':
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dest += calc_filename_fmt("%I:%M:%S %p", now_tm);
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break;
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case 'R':
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dest += calc_filename_fmt("%H:%M", now_tm);
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break;
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case 'T':
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case 'X':
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dest += calc_filename_fmt("%H:%M:%S", now_tm);
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break;
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case 'z':
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total_minutes = spdlog::details::os::utc_minutes_offset ();
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if (total_minutes >= 0) {
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dest += fmt::format ("+{:02}:{:02}", total_minutes / 60, total_minutes % 60);
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} else {
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total_minutes = -total_minutes;
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dest += fmt::format ("-{:02}:{:02}", total_minutes / 60, total_minutes % 60);
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}
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break;
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case '%':
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dest += '%';
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break;
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default:
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throw_spdlog_ex("daily_file_sink: Invalid format");
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}
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} else {
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dest += filename [i];
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}
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}
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return dest;
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}
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};
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/*
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* Rotating file sink based on date.
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* If truncate != false , the created file will be truncated.
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* If max_files > 0, retain only the last max_files and delete previous.
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*/
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template<typename Mutex, typename FileNameCalc = daily_filename_calculator>
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class daily_file_sink final : public base_sink<Mutex>
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{
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public:
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// create daily file sink which rotates on given time
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daily_file_sink(filename_t base_filename, int rotation_hour, int rotation_minute, bool truncate = false, uint16_t max_files = 0, bool is_fmt = false)
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: base_filename_(std::move(base_filename))
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, rotation_h_(rotation_hour)
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, rotation_m_(rotation_minute)
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, truncate_(truncate)
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, max_files_(max_files)
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, filenames_q_()
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, is_fmt_(is_fmt)
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{
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if (rotation_hour < 0 || rotation_hour > 23 || rotation_minute < 0 || rotation_minute > 59)
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{
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throw_spdlog_ex("daily_file_sink: Invalid rotation time in ctor");
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}
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auto now = log_clock::now();
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auto filename = is_fmt_ ? FileNameCalc::calc_filename_fmt(base_filename_, now_tm(now))
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: FileNameCalc::calc_filename(base_filename_, now_tm(now));
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file_helper_.open(filename, truncate_);
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rotation_tp_ = next_rotation_tp_();
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if (max_files_ > 0)
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{
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init_filenames_q_();
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}
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}
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filename_t filename()
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{
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std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
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return file_helper_.filename();
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}
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protected:
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void sink_it_(const details::log_msg &msg) override
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{
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auto time = msg.time;
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bool should_rotate = time >= rotation_tp_;
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if (should_rotate)
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{
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auto filename = is_fmt_ ? FileNameCalc::calc_filename_fmt(base_filename_, now_tm(time))
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: FileNameCalc::calc_filename(base_filename_, now_tm(time));
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file_helper_.open(filename, truncate_);
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rotation_tp_ = next_rotation_tp_();
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}
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memory_buf_t formatted;
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base_sink<Mutex>::formatter_->format(msg, formatted);
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file_helper_.write(formatted);
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// Do the cleaning only at the end because it might throw on failure.
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if (should_rotate && max_files_ > 0)
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{
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delete_old_();
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}
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}
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void flush_() override
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{
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file_helper_.flush();
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}
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private:
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void init_filenames_q_()
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{
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using details::os::path_exists;
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filenames_q_ = details::circular_q<filename_t>(static_cast<size_t>(max_files_));
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std::vector<filename_t> filenames;
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auto now = log_clock::now();
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while (filenames.size() < max_files_)
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{
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auto filename = is_fmt_ ? FileNameCalc::calc_filename_fmt(base_filename_, now_tm(now))
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: FileNameCalc::calc_filename(base_filename_, now_tm(now));
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if (!path_exists(filename))
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{
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break;
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}
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filenames.emplace_back(filename);
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now -= std::chrono::hours(24);
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}
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for (auto iter = filenames.rbegin(); iter != filenames.rend(); ++iter)
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{
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filenames_q_.push_back(std::move(*iter));
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}
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}
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tm now_tm(log_clock::time_point tp)
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{
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time_t tnow = log_clock::to_time_t(tp);
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return spdlog::details::os::localtime(tnow);
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}
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log_clock::time_point next_rotation_tp_()
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{
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auto now = log_clock::now();
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tm date = now_tm(now);
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date.tm_hour = rotation_h_;
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date.tm_min = rotation_m_;
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date.tm_sec = 0;
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auto rotation_time = log_clock::from_time_t(std::mktime(&date));
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if (rotation_time > now)
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{
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return rotation_time;
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}
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return {rotation_time + std::chrono::hours(24)};
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}
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// Delete the file N rotations ago.
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// Throw spdlog_ex on failure to delete the old file.
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void delete_old_()
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{
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using details::os::filename_to_str;
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using details::os::remove_if_exists;
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filename_t current_file = file_helper_.filename();
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if (filenames_q_.full())
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{
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auto old_filename = std::move(filenames_q_.front());
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filenames_q_.pop_front();
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bool ok = remove_if_exists(old_filename) == 0;
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if (!ok)
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{
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filenames_q_.push_back(std::move(current_file));
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throw_spdlog_ex("Failed removing daily file " + filename_to_str(old_filename), errno);
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}
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}
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filenames_q_.push_back(std::move(current_file));
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}
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filename_t base_filename_;
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int rotation_h_;
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int rotation_m_;
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log_clock::time_point rotation_tp_;
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details::file_helper file_helper_;
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bool truncate_;
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uint16_t max_files_;
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details::circular_q<filename_t> filenames_q_;
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bool is_fmt_;
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};
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using daily_file_sink_mt = daily_file_sink<std::mutex>;
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using daily_file_sink_st = daily_file_sink<details::null_mutex>;
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} // namespace sinks
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//
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// factory functions
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//
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template<typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> daily_logger_mt(
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const std::string &logger_name, const filename_t &filename, int hour = 0, int minute = 0, bool truncate = false, uint16_t max_files = 0)
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{
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return Factory::template create<sinks::daily_file_sink_mt>(logger_name, filename, hour, minute, truncate, max_files, false);
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}
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template<typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> daily_logger_format_mt(
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const std::string &logger_name, const filename_t &filename, int hour = 0, int minute = 0, bool truncate = false, uint16_t max_files = 0)
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{
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return Factory::template create<sinks::daily_file_sink_mt>(logger_name, filename, hour, minute, truncate, max_files, true);
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}
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template<typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> daily_logger_st(
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const std::string &logger_name, const filename_t &filename, int hour = 0, int minute = 0, bool truncate = false, uint16_t max_files = 0)
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{
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return Factory::template create<sinks::daily_file_sink_st>(logger_name, filename, hour, minute, truncate, max_files, false);
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}
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template<typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> daily_logger_format_st(
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const std::string &logger_name, const filename_t &filename, int hour = 0, int minute = 0, bool truncate = false, uint16_t max_files = 0)
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{
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return Factory::template create<sinks::daily_file_sink_st>(logger_name, filename, hour, minute, truncate, max_files, true);
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}
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} // namespace spdlog
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