mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
135 lines
3.5 KiB
C++
135 lines
3.5 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#pragma once
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#include "BinlogReaderInterface.h"
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#include "td/db/utils/FileSyncState.h"
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#include "td/db/utils/StreamInterface.h"
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#include "td/actor/actor.h"
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#include "td/utils/misc.h"
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#include "td/utils/port/FileFd.h"
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namespace td {
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class BinlogReaderInterface;
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class StreamToFileActor;
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namespace detail {
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class FlushHelperActor;
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} // namespace detail
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class Binlog {
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public:
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explicit Binlog(string path);
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Status replay_sync(BinlogReaderInterface& binlog_reader);
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void replay_async(std::shared_ptr<BinlogReaderInterface> binlog_reader, Promise<Unit> promise);
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static void destroy(CSlice path);
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void destroy();
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private:
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string path_;
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};
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class BinlogWriter {
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public:
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BinlogWriter(std::string path);
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Status open();
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template <class EventT>
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Status write_event(EventT&& event, BinlogReaderInterface* binlog_reader);
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Status lazy_flush();
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Status flush();
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Status sync();
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Status close();
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private:
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string path_;
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FileFd fd_;
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StreamReader buf_reader_;
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StreamWriter buf_writer_;
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};
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class BinlogWriterAsync {
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public:
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BinlogWriterAsync(std::string path);
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~BinlogWriterAsync();
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Status open();
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template <class EventT>
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Status write_event(EventT&& event, BinlogReaderInterface* binlog_reader);
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void close(Promise<> promise);
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void lazy_flush();
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void flush();
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void sync(Promise<Unit> promise = {});
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private:
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std::string path_;
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StreamWriter buf_writer_;
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actor::ActorId<StreamToFileActor> writer_actor_;
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actor::ActorOwn<detail::FlushHelperActor> flush_helper_actor_;
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FileSyncState::Reader sync_state_reader_;
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};
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template <class EventT>
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Status BinlogWriter::write_event(EventT&& event, BinlogReaderInterface* binlog_reader) {
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int64 need_size = -event.serialize({});
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auto dest =
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buf_writer_.prepare_write_at_least(narrow_cast<size_t>(need_size)).truncate(narrow_cast<size_t>(need_size));
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auto written = event.serialize(dest);
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CHECK(written == need_size);
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if (binlog_reader != nullptr) {
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TRY_RESULT(parsed, binlog_reader->parse(dest));
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binlog_reader->flush();
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CHECK(parsed == written);
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}
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buf_writer_.confirm_write(narrow_cast<size_t>(written));
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return lazy_flush();
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}
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template <class EventT>
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Status BinlogWriterAsync::write_event(EventT&& event, BinlogReaderInterface* binlog_reader) {
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int64 need_size = -event.serialize({});
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auto dest =
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buf_writer_.prepare_write_at_least(narrow_cast<size_t>(need_size)).truncate(narrow_cast<size_t>(need_size));
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auto written = event.serialize(dest);
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CHECK(written == need_size);
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if (binlog_reader != nullptr) {
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TRY_RESULT(parsed, binlog_reader->parse(dest));
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CHECK(parsed == written);
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}
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buf_writer_.confirm_write(narrow_cast<size_t>(written));
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lazy_flush();
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return Status::OK();
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}
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} // namespace td
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