332 lines
10 KiB
C++
332 lines
10 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/FileLoader.h"
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#include "td/telegram/files/ResourceManager.h"
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#include "td/telegram/Global.h"
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#include "td/telegram/net/NetQueryDispatcher.h"
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#include "td/telegram/UniqueId.h"
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#include "td/utils/common.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 <tuple>
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#include <utility>
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namespace td {
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void FileLoader::set_resource_manager(ActorShared<ResourceManager> resource_manager) {
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resource_manager_ = std::move(resource_manager);
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send_closure(resource_manager_, &ResourceManager::update_resources, resource_state_);
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}
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void FileLoader::update_priority(int8 priority) {
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send_closure(resource_manager_, &ResourceManager::update_priority, priority);
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}
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void FileLoader::update_resources(const ResourceState &other) {
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resource_state_.update_slave(other);
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VLOG(files) << "Update resources " << resource_state_;
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loop();
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}
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void FileLoader::set_ordered_flag(bool flag) {
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ordered_flag_ = flag;
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}
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size_t FileLoader::get_part_size() const {
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return parts_manager_.get_part_size();
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}
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void FileLoader::hangup() {
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// if (!stop_flag_) {
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// stop_flag_ = true;
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// on_error(Status::Error("Cancelled"));
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//}
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stop();
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}
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void FileLoader::update_local_file_location(const LocalFileLocation &local) {
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auto r_prefix_info = on_update_local_location(local, parts_manager_.get_size_or_zero());
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if (r_prefix_info.is_error()) {
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on_error(r_prefix_info.move_as_error());
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stop_flag_ = true;
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return;
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}
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auto prefix_info = r_prefix_info.move_as_ok();
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auto status = parts_manager_.set_known_prefix(narrow_cast<size_t>(prefix_info.size), prefix_info.is_ready);
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if (status.is_error()) {
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on_error(std::move(status));
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stop_flag_ = true;
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return;
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}
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loop();
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}
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void FileLoader::update_download_offset(int64 offset) {
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if (parts_manager_.get_streaming_offset() != offset) {
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parts_manager_.set_streaming_offset(offset);
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//TODO: cancel only some queries
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for (auto &it : part_map_) {
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it.second.second.reset(); // cancel_query(it.second.second);
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}
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}
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update_estimated_limit();
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loop();
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}
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void FileLoader::update_download_limit(int64 limit) {
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parts_manager_.set_streaming_limit(limit);
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update_estimated_limit();
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loop();
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}
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void FileLoader::start_up() {
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auto r_file_info = init();
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if (r_file_info.is_error()) {
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on_error(r_file_info.move_as_error());
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stop_flag_ = true;
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return;
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}
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auto file_info = r_file_info.ok();
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auto size = file_info.size;
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auto expected_size = max(size, file_info.expected_size);
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bool is_size_final = file_info.is_size_final;
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auto part_size = file_info.part_size;
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auto &ready_parts = file_info.ready_parts;
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auto use_part_count_limit = file_info.use_part_count_limit;
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auto status = parts_manager_.init(size, expected_size, is_size_final, part_size, ready_parts, use_part_count_limit);
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if (status.is_error()) {
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on_error(std::move(status));
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stop_flag_ = true;
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return;
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}
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if (file_info.only_check) {
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parts_manager_.set_checked_prefix_size(0);
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}
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parts_manager_.set_streaming_offset(file_info.offset);
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parts_manager_.set_streaming_limit(file_info.limit);
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if (ordered_flag_) {
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ordered_parts_ = OrderedEventsProcessor<std::pair<Part, NetQueryPtr>>(parts_manager_.get_ready_prefix_count());
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}
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if (file_info.need_delay) {
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delay_dispatcher_ = create_actor<DelayDispatcher>("DelayDispatcher", 0.003);
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next_delay_ = 0.05;
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}
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resource_state_.set_unit_size(parts_manager_.get_part_size());
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update_estimated_limit();
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on_progress_impl();
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yield();
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}
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void FileLoader::loop() {
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if (stop_flag_) {
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return;
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}
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auto status = do_loop();
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if (status.is_error()) {
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if (status.code() == 1) {
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return;
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}
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on_error(std::move(status));
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stop_flag_ = true;
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return;
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}
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}
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Status FileLoader::do_loop() {
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TRY_RESULT(check_info,
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check_loop(parts_manager_.get_checked_prefix_size(), parts_manager_.get_unchecked_ready_prefix_size(),
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parts_manager_.unchecked_ready()));
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if (check_info.changed) {
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on_progress_impl();
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}
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for (auto &query : check_info.queries) {
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G()->net_query_dispatcher().dispatch_with_callback(
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std::move(query), actor_shared(this, UniqueId::next(UniqueId::Type::Default, COMMON_QUERY_KEY)));
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}
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if (check_info.need_check) {
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parts_manager_.set_need_check();
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parts_manager_.set_checked_prefix_size(check_info.checked_prefix_size);
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}
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if (parts_manager_.may_finish()) {
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TRY_STATUS(parts_manager_.finish());
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TRY_STATUS(on_ok(parts_manager_.get_size()));
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LOG(INFO) << "Bad download order rate: "
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<< (debug_total_parts_ == 0 ? 0.0 : 100.0 * debug_bad_part_order_ / debug_total_parts_) << "% "
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<< debug_bad_part_order_ << "/" << debug_total_parts_ << " " << format::as_array(debug_bad_parts_);
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stop_flag_ = true;
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return Status::OK();
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}
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TRY_STATUS(before_start_parts());
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SCOPE_EXIT {
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after_start_parts();
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};
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while (true) {
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if (blocking_id_ != 0) {
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break;
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}
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if (resource_state_.unused() < static_cast<int64>(parts_manager_.get_part_size())) {
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VLOG(files) << "Got only " << resource_state_.unused() << " resource";
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break;
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}
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TRY_RESULT(part, parts_manager_.start_part());
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if (part.size == 0) {
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break;
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}
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VLOG(files) << "Start part " << tag("id", part.id) << tag("size", part.size);
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resource_state_.start_use(static_cast<int64>(part.size));
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TRY_RESULT(query_flag, start_part(part, parts_manager_.get_part_count()));
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NetQueryPtr query;
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bool is_blocking;
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std::tie(query, is_blocking) = std::move(query_flag);
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uint64 id = UniqueId::next();
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if (is_blocking) {
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CHECK(blocking_id_ == 0);
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blocking_id_ = id;
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}
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part_map_[id] = std::make_pair(part, query->cancel_slot_.get_signal_new());
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// part_map_[id] = std::make_pair(part, query.get_weak());
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auto callback = actor_shared(this, id);
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if (delay_dispatcher_.empty()) {
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G()->net_query_dispatcher().dispatch_with_callback(std::move(query), std::move(callback));
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} else {
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send_closure(delay_dispatcher_, &DelayDispatcher::send_with_callback_and_delay, std::move(query),
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std::move(callback), next_delay_);
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next_delay_ = max(next_delay_ * 0.8, 0.003);
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}
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}
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return Status::OK();
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}
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void FileLoader::tear_down() {
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for (auto &it : part_map_) {
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it.second.second.reset(); // cancel_query(it.second.second);
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}
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ordered_parts_.clear([](auto &&part) { part.second->clear(); });
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send_closure(std::move(delay_dispatcher_), &DelayDispatcher::close_silent);
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}
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void FileLoader::update_estimated_limit() {
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if (stop_flag_) {
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return;
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}
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auto estimated_extra = parts_manager_.get_estimated_extra();
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resource_state_.update_estimated_limit(estimated_extra);
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VLOG(files) << "Update estimated limit " << estimated_extra;
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if (!resource_manager_.empty()) {
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keep_fd_flag(narrow_cast<uint64>(resource_state_.active_limit()) >= parts_manager_.get_part_size());
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send_closure(resource_manager_, &ResourceManager::update_resources, resource_state_);
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}
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}
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void FileLoader::on_result(NetQueryPtr query) {
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if (stop_flag_) {
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return;
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}
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auto id = get_link_token();
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if (id == blocking_id_) {
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blocking_id_ = 0;
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}
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if (UniqueId::extract_key(id) == COMMON_QUERY_KEY) {
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on_common_query(std::move(query));
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return loop();
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}
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auto it = part_map_.find(id);
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if (it == part_map_.end()) {
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LOG(WARNING) << "Got result for unknown part";
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return;
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}
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Part part = it->second.first;
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it->second.second.release();
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CHECK(query->is_ready());
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bool next = false;
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auto status = [&] {
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TRY_RESULT(should_restart, should_restart_part(part, query));
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if (query->is_error() && query->error().code() == NetQuery::Error::Cancelled) {
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should_restart = true;
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}
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if (should_restart) {
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VLOG(files) << "Restart part " << tag("id", part.id) << tag("size", part.size);
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resource_state_.stop_use(static_cast<int64>(part.size));
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parts_manager_.on_part_failed(part.id);
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} else {
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next = true;
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}
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return Status::OK();
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}();
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if (status.is_error()) {
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on_error(std::move(status));
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stop_flag_ = true;
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return;
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}
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if (next) {
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if (ordered_flag_) {
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auto seq_no = part.id;
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ordered_parts_.add(seq_no, std::make_pair(part, std::move(query)),
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[this](auto seq_no, auto &&p) { this->on_part_query(p.first, std::move(p.second)); });
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} else {
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on_part_query(part, std::move(query));
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}
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}
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update_estimated_limit();
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loop();
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}
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void FileLoader::on_part_query(Part part, NetQueryPtr query) {
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if (stop_flag_) {
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// important for secret chats
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return;
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}
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auto status = try_on_part_query(part, std::move(query));
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if (status.is_error()) {
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on_error(std::move(status));
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stop_flag_ = true;
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}
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}
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void FileLoader::on_common_query(NetQueryPtr query) {
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auto status = process_check_query(std::move(query));
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if (status.is_error()) {
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on_error(std::move(status));
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stop_flag_ = true;
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}
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}
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Status FileLoader::try_on_part_query(Part part, NetQueryPtr query) {
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TRY_RESULT(size, process_part(part, std::move(query)));
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VLOG(files) << "Ok part " << tag("id", part.id) << tag("size", part.size);
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resource_state_.stop_use(static_cast<int64>(part.size));
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auto old_ready_prefix_count = parts_manager_.get_unchecked_ready_prefix_count();
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TRY_STATUS(parts_manager_.on_part_ok(part.id, part.size, size));
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auto new_ready_prefix_count = parts_manager_.get_unchecked_ready_prefix_count();
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debug_total_parts_++;
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if (old_ready_prefix_count == new_ready_prefix_count) {
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debug_bad_parts_.push_back(part.id);
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debug_bad_part_order_++;
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}
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on_progress_impl();
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return Status::OK();
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}
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void FileLoader::on_progress_impl() {
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Progress progress;
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progress.part_count = parts_manager_.get_part_count();
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progress.part_size = static_cast<int32>(parts_manager_.get_part_size());
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progress.ready_part_count = parts_manager_.get_ready_prefix_count();
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progress.ready_bitmask = parts_manager_.get_bitmask();
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progress.is_ready = parts_manager_.ready();
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progress.ready_size = parts_manager_.get_ready_size();
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progress.size = parts_manager_.get_size_or_zero();
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on_progress(std::move(progress));
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}
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} // namespace td
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