95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/utils/common.h"
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#include "td/utils/logging.h"
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#include "td/utils/port/Fd.h"
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#include "td/utils/port/FileFd.h"
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#include "td/utils/port/path.h"
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#include "td/utils/Slice.h"
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#include <cstdlib>
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#include <limits>
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namespace td {
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// TODO move implementation to cpp
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class FileLog : public LogInterface {
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static constexpr int DEFAULT_ROTATE_THRESHOLD = 10 * (1 << 20);
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public:
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void append(CSlice xslice, int log_level) override {
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Slice slice = xslice;
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while (!slice.empty()) {
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auto r_size = fd_.write(slice);
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if (r_size.is_error()) {
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std::abort();
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}
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auto written = r_size.ok();
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size_ += static_cast<int64>(written);
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slice.remove_prefix(written);
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}
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if (log_level == VERBOSITY_NAME(FATAL)) {
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std::abort();
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}
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if (size_ > rotate_threshold_) {
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auto status = rename(path_, path_ + ".old");
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if (status.is_error()) {
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std::abort();
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}
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do_rotate();
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}
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}
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void rotate() override {
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if (path_.empty()) {
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return;
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}
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do_rotate();
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}
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void init(string path, int64 rotate_threshold = DEFAULT_ROTATE_THRESHOLD) {
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fd_.close();
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path_ = std::move(path);
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auto r_fd = FileFd::open(path_, FileFd::Create | FileFd::Write | FileFd::Append);
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LOG_IF(FATAL, r_fd.is_error()) << "Can't open log: " << r_fd.error();
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fd_ = r_fd.move_as_ok();
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Fd::duplicate(fd_.get_fd(), Fd::Stderr()).ignore();
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size_ = fd_.get_size();
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rotate_threshold_ = rotate_threshold;
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}
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void set_rotate_threshold(int64 rotate_threshold) {
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rotate_threshold_ = rotate_threshold;
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}
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private:
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FileFd fd_;
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string path_;
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int64 size_;
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int64 rotate_threshold_;
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void do_rotate() {
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auto current_verbosity_level = GET_VERBOSITY_LEVEL();
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SET_VERBOSITY_LEVEL(std::numeric_limits<int>::min()); // to ensure that nothing will be printed to the closed log
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CHECK(!path_.empty());
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fd_.close();
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auto r_fd = FileFd::open(path_, FileFd::Create | FileFd::Truncate | FileFd::Write);
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if (r_fd.is_error()) {
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std::abort();
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}
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fd_ = r_fd.move_as_ok();
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Fd::duplicate(fd_.get_fd(), Fd::Stderr()).ignore();
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size_ = 0;
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SET_VERBOSITY_LEVEL(current_verbosity_level);
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}
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};
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} // namespace td
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