6ead5a4696
the log.hh under the root of the tree was created keep the backward compatibility when seastar was extracted into a separate library. so log.hh should belong to `utils` directory, as it is based solely on seastar, and can be used all subsystems. in this change, we move log.hh into utils/log.hh to that it is more modularized. and this also improves the readability, when one see `#include "utils/log.hh"`, it is obvious that this source file needs the logging system, instead of its own log facility -- please note, we do have two other `log.hh` in the tree. Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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* Copyright (C) 2020-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include <exception>
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#include "sstables/random_access_reader.hh"
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#include "utils/disk-error-handler.hh"
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#include "utils/log.hh"
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namespace sstables {
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extern logging::logger sstlog;
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future <temporary_buffer<char>> random_access_reader::read_exactly(size_t n) noexcept {
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try {
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return _in->read_exactly(n);
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} catch (...) {
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return current_exception_as_future<temporary_buffer<char>>();
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}
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}
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static future<> close_if_needed(std::unique_ptr<input_stream<char>> in) {
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if (!in) {
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return make_ready_future<>();
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}
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return in->close().finally([in = std::move(in)] {});
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}
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future<> random_access_reader::seek(uint64_t pos) noexcept {
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try {
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auto tmp = std::make_unique<input_stream<char>>(open_at(pos));
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std::swap(tmp, _in);
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return close_if_needed(std::move(tmp));
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} catch (...) {
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return current_exception_as_future();
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}
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}
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future<> random_access_reader::close() noexcept {
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return futurize_invoke(close_if_needed, std::move(_in));
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}
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file_random_access_reader::file_random_access_reader(file f, uint64_t file_size, size_t buffer_size, unsigned read_ahead)
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: _file(std::move(f)), _file_size(file_size), _buffer_size(buffer_size), _read_ahead(read_ahead) {
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set(open_at(0));
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}
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input_stream<char> file_random_access_reader::open_at(uint64_t pos) {
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auto len = _file_size - pos;
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file_input_stream_options options;
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options.buffer_size = _buffer_size;
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options.read_ahead = _read_ahead;
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return make_file_input_stream(_file, pos, len, std::move(options));
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}
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future<> file_random_access_reader::close() noexcept {
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return random_access_reader::close().finally([this] {
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return _file.close().handle_exception([save = _file](auto ep) {
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sstlog.warn("sstable close failed: {}", ep);
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general_disk_error();
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});
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});
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}
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}
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