320 lines
11 KiB
C++
320 lines
11 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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#include "td/telegram/files/FileDb.h"
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#include "td/telegram/files/FileData.h"
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#include "td/telegram/files/FileData.hpp"
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#include "td/telegram/files/FileLocation.h"
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#include "td/telegram/Version.h"
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#include "td/actor/actor.h"
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#include "td/db/SqliteConnectionSafe.h"
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#include "td/db/SqliteKeyValue.h"
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#include "td/db/SqliteKeyValueSafe.h"
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#include "td/utils/format.h"
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#include "td/utils/logging.h"
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#include "td/utils/misc.h"
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#include "td/utils/ScopeGuard.h"
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#include "td/utils/Slice.h"
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#include "td/utils/StackAllocator.h"
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#include "td/utils/Status.h"
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#include "td/utils/tl_helpers.h"
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#include "td/utils/tl_parsers.h"
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#include "td/utils/tl_storers.h"
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namespace td {
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Status drop_file_db(SqliteDb &db, int32 version) {
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LOG(WARNING) << "Drop file_db " << tag("version", version) << tag("current_db_version", current_db_version());
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TRY_STATUS(SqliteKeyValue::drop(db, "files"));
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return Status::OK();
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}
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Status fix_file_remote_location_key_bug(SqliteDb &db);
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Status init_file_db(SqliteDb &db, int32 version) {
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LOG(INFO) << "Init file database " << tag("version", version);
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// Check if database exists
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TRY_RESULT(has_table, db.has_table("files"));
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if (!has_table) {
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version = 0;
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} else if (version < static_cast<int32>(DbVersion::DialogDbCreated)) {
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TRY_STATUS(drop_file_db(db, version));
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version = 0;
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} else if (version < static_cast<int>(DbVersion::FixFileRemoteLocationKeyBug)) {
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TRY_STATUS(fix_file_remote_location_key_bug(db));
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}
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if (version == 0) {
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TRY_STATUS(SqliteKeyValue::init(db, "files"));
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}
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return Status::OK();
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}
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class FileDb : public FileDbInterface {
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public:
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class FileDbActor : public Actor {
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public:
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FileDbActor(FileDbId current_pmc_id, std::shared_ptr<SqliteKeyValueSafe> file_kv_safe)
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: current_pmc_id_(current_pmc_id), file_kv_safe_(std::move(file_kv_safe)) {
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}
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void close(Promise<> promise) {
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file_kv_safe_.reset();
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LOG(INFO) << "FileDb is closed";
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promise.set_value(Unit());
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stop();
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}
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void load_file_data(const string &key, Promise<FileData> promise) {
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promise.set_result(load_file_data_impl(actor_id(this), file_pmc(), key));
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}
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void clear_file_data(FileDbId id, const string &remote_key, const string &local_key, const string &generate_key) {
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auto &pmc = file_pmc();
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pmc.begin_transaction().ensure();
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SCOPE_EXIT {
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pmc.commit_transaction().ensure();
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};
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if (id > current_pmc_id_) {
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pmc.set("file_id", to_string(id.get()));
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current_pmc_id_ = id;
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}
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pmc.erase(PSTRING() << "file" << id.get());
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LOG(DEBUG) << "ERASE " << format::as_hex_dump<4>(Slice(PSLICE() << "file" << id.get()));
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if (!remote_key.empty()) {
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pmc.erase(remote_key);
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LOG(DEBUG) << "ERASE remote " << format::as_hex_dump<4>(Slice(remote_key));
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}
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if (!local_key.empty()) {
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pmc.erase(local_key);
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LOG(DEBUG) << "ERASE local " << format::as_hex_dump<4>(Slice(local_key));
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}
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if (!generate_key.empty()) {
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pmc.erase(generate_key);
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}
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}
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void store_file_data(FileDbId id, const string &file_data, const string &remote_key, const string &local_key,
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const string &generate_key) {
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auto &pmc = file_pmc();
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pmc.begin_transaction().ensure();
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SCOPE_EXIT {
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pmc.commit_transaction().ensure();
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};
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if (id > current_pmc_id_) {
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pmc.set("file_id", to_string(id.get()));
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current_pmc_id_ = id;
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}
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pmc.set(PSTRING() << "file" << id.get(), file_data);
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if (!remote_key.empty()) {
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pmc.set(remote_key, to_string(id.get()));
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}
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if (!local_key.empty()) {
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pmc.set(local_key, to_string(id.get()));
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}
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if (!generate_key.empty()) {
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pmc.set(generate_key, to_string(id.get()));
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}
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}
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void store_file_data_ref(FileDbId id, FileDbId new_id) {
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auto &pmc = file_pmc();
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pmc.begin_transaction().ensure();
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SCOPE_EXIT {
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pmc.commit_transaction().ensure();
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};
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if (id > current_pmc_id_) {
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pmc.set("file_id", to_string(id.get()));
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current_pmc_id_ = id;
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}
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do_store_file_data_ref(id, new_id);
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}
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void optimize_refs(const std::vector<FileDbId> ids, FileDbId main_id) {
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LOG(INFO) << "Optimize " << ids.size() << " ids in file database to " << main_id.get();
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auto &pmc = file_pmc();
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pmc.begin_transaction().ensure();
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SCOPE_EXIT {
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pmc.commit_transaction().ensure();
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};
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for (size_t i = 0; i + 1 < ids.size(); i++) {
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do_store_file_data_ref(ids[i], main_id);
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}
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}
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private:
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FileDbId current_pmc_id_;
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std::shared_ptr<SqliteKeyValueSafe> file_kv_safe_;
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SqliteKeyValue &file_pmc() {
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return file_kv_safe_->get();
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}
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void do_store_file_data_ref(FileDbId id, FileDbId new_id) {
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file_pmc().set(PSTRING() << "file" << id.get(), PSTRING() << "@@" << new_id.get());
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}
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};
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explicit FileDb(std::shared_ptr<SqliteKeyValueSafe> kv_safe, int scheduler_id = -1) {
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file_kv_safe_ = std::move(kv_safe);
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CHECK(file_kv_safe_);
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current_pmc_id_ = FileDbId(to_integer<uint64>(file_kv_safe_->get().get("file_id")));
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file_db_actor_ =
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create_actor_on_scheduler<FileDbActor>("FileDbActor", scheduler_id, current_pmc_id_, file_kv_safe_);
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}
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FileDbId create_pmc_id() override {
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current_pmc_id_ = FileDbId(current_pmc_id_.get() + 1);
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return current_pmc_id_;
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}
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void close(Promise<> promise) override {
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send_closure(std::move(file_db_actor_), &FileDbActor::close, std::move(promise));
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}
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void get_file_data_impl(string key, Promise<FileData> promise) override {
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send_closure(file_db_actor_, &FileDbActor::load_file_data, std::move(key), std::move(promise));
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}
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Result<FileData> get_file_data_sync_impl(string key) override {
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return load_file_data_impl(file_db_actor_.get(), file_kv_safe_->get(), key);
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}
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void clear_file_data(FileDbId id, const FileData &file_data) override {
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string remote_key;
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if (file_data.remote_.type() == RemoteFileLocation::Type::Full) {
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remote_key = as_key(file_data.remote_.full());
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}
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string local_key;
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if (file_data.local_.type() == LocalFileLocation::Type::Full) {
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local_key = as_key(file_data.local_.full());
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}
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string generate_key;
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if (file_data.generate_ != nullptr) {
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generate_key = as_key(*file_data.generate_);
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}
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send_closure(file_db_actor_, &FileDbActor::clear_file_data, id, remote_key, local_key, generate_key);
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}
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void set_file_data(FileDbId id, const FileData &file_data, bool new_remote, bool new_local,
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bool new_generate) override {
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string remote_key;
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if (file_data.remote_.type() == RemoteFileLocation::Type::Full && new_remote) {
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remote_key = as_key(file_data.remote_.full());
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}
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string local_key;
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if (file_data.local_.type() == LocalFileLocation::Type::Full && new_local) {
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local_key = as_key(file_data.local_.full());
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}
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string generate_key;
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if (file_data.generate_ != nullptr && new_generate) {
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generate_key = as_key(*file_data.generate_);
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}
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LOG(DEBUG) << "SAVE " << id.get() << " -> " << file_data << " "
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<< tag("remote", format::as_hex_dump<4>(Slice(remote_key)))
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<< tag("local", format::as_hex_dump<4>(Slice(local_key)));
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send_closure(file_db_actor_, &FileDbActor::store_file_data, id, serialize(file_data), remote_key, local_key,
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generate_key);
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}
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void set_file_data_ref(FileDbId id, FileDbId new_id) override {
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send_closure(file_db_actor_, &FileDbActor::store_file_data_ref, id, new_id);
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}
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SqliteKeyValue &pmc() override {
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return file_kv_safe_->get();
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}
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private:
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ActorOwn<FileDbActor> file_db_actor_;
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FileDbId current_pmc_id_;
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std::shared_ptr<SqliteKeyValueSafe> file_kv_safe_;
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static Result<FileData> load_file_data_impl(ActorId<FileDbActor> file_db_actor_id, SqliteKeyValue &pmc,
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const string &key) {
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//LOG(DEBUG) << "Load by key " << format::as_hex_dump<4>(Slice(key));
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TRY_RESULT(id, get_id(pmc, key));
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vector<FileDbId> ids;
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string data_str;
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int attempt_count = 0;
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while (true) {
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if (attempt_count > 100) {
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LOG(FATAL) << "cycle in file database?";
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}
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attempt_count++;
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data_str = pmc.get(PSTRING() << "file" << id.get());
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auto data_slice = Slice(data_str);
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if (data_slice.substr(0, 2) == "@@") {
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ids.push_back(id);
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id = FileDbId(to_integer<uint64>(data_slice.substr(2)));
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} else {
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break;
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}
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}
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if (ids.size() > 1) {
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send_closure(file_db_actor_id, &FileDbActor::optimize_refs, std::move(ids), id);
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}
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//LOG(DEBUG) << "By id " << id.get() << " found data " << format::as_hex_dump<4>(Slice(data_str));
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//LOG(INFO) << attempt_count;
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FileData data;
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auto status = unserialize(data, data_str);
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if (status.is_error()) {
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return std::move(status);
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}
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return std::move(data);
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}
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static Result<FileDbId> get_id(SqliteKeyValue &pmc, const string &key) TD_WARN_UNUSED_RESULT {
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auto id_str = pmc.get(key);
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//LOG(DEBUG) << "Found id " << id_str << " by key " << format::as_hex_dump<4>(Slice(key));
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if (id_str.empty()) {
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return Status::Error("There is no such a key in database");
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}
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return FileDbId(to_integer<uint64>(id_str));
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}
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};
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std::shared_ptr<FileDbInterface> create_file_db(std::shared_ptr<SqliteConnectionSafe> connection, int scheduler_id) {
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auto kv = std::make_shared<SqliteKeyValueSafe>("files", std::move(connection));
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return std::make_shared<FileDb>(std::move(kv), scheduler_id);
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}
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Status fix_file_remote_location_key_bug(SqliteDb &db) {
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static const int32 OLD_KEY_MAGIC = 0x64378433;
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SqliteKeyValue kv;
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kv.init_with_connection(db.clone(), "files").ensure();
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auto ptr = StackAllocator::alloc(4);
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MutableSlice prefix = ptr.as_slice();
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TlStorerUnsafe(prefix.ubegin()).store_int(OLD_KEY_MAGIC);
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kv.get_by_prefix(prefix, [&](Slice key, Slice value) {
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CHECK(TlParser(key).fetch_int() == OLD_KEY_MAGIC);
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auto remote_str = PSTRING() << key.substr(4, 4) << Slice("\0\0\0\0") << key.substr(8);
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FullRemoteFileLocation remote;
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if (unserialize(remote, remote_str).is_ok()) {
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kv.set(FileDbInterface::as_key(remote), value);
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}
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LOG(DEBUG) << "ERASE " << format::as_hex_dump<4>(Slice(key));
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kv.erase(key);
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});
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return Status::OK();
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}
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} // namespace td
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