92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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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/telegram/files/FileDbId.h"
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#include "td/actor/PromiseFuture.h"
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#include "td/utils/buffer.h"
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#include "td/utils/logging.h"
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#include "td/utils/Status.h"
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#include "td/utils/tl_storers.h"
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#include <memory>
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namespace td {
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class FileData;
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class SqliteDb;
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class SqliteConnectionSafe;
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class SqliteKeyValue;
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Status drop_file_db(SqliteDb &db, int32 version) TD_WARN_UNUSED_RESULT;
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Status init_file_db(SqliteDb &db, int32 version) TD_WARN_UNUSED_RESULT;
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class FileDbInterface;
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std::shared_ptr<FileDbInterface> create_file_db(std::shared_ptr<SqliteConnectionSafe> connection,
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int32 scheduler_id = -1) TD_WARN_UNUSED_RESULT;
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class FileDbInterface {
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public:
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FileDbInterface() = default;
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FileDbInterface(const FileDbInterface &) = delete;
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FileDbInterface &operator=(const FileDbInterface &) = delete;
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virtual ~FileDbInterface() = default;
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// non thread safe
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virtual FileDbId create_pmc_id() = 0;
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// thread safe
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virtual void close(Promise<> promise) = 0;
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template <class LocationT>
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static string as_key(const LocationT &object) {
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TlStorerCalcLength calc_length;
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calc_length.store_int(0);
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object.as_key().store(calc_length);
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BufferSlice key_buffer{calc_length.get_length()};
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auto key = key_buffer.as_slice();
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TlStorerUnsafe storer(key.ubegin());
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storer.store_int(LocationT::KEY_MAGIC);
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object.as_key().store(storer);
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CHECK(storer.get_buf() == key.uend());
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return key.str();
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}
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template <class LocationT>
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void get_file_data(const LocationT &location, Promise<FileData> promise) {
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get_file_data_impl(as_key(location), std::move(promise));
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}
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template <class LocationT>
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Result<FileData> get_file_data_sync(const LocationT &location) {
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auto res = get_file_data_sync_impl(as_key(location));
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if (res.is_ok()) {
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LOG(DEBUG) << "GET " << location << " " << res.ok();
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} else {
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LOG(DEBUG) << "GET " << location << " " << res.error();
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}
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return res;
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}
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virtual void clear_file_data(FileDbId id, const FileData &file_data) = 0;
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virtual void set_file_data(FileDbId id, const FileData &file_data, bool new_remote, bool new_local,
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bool new_generate) = 0;
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virtual void set_file_data_ref(FileDbId id, FileDbId new_id) = 0;
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// For FileStatsWorker. TODO: remove it
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virtual SqliteKeyValue &pmc() = 0;
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private:
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virtual void get_file_data_impl(string key, Promise<FileData> promise) = 0;
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virtual Result<FileData> get_file_data_sync_impl(string key) = 0;
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};
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} // namespace td
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