111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
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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/QueryCombiner.h"
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#include "td/telegram/Global.h"
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#include "td/utils/logging.h"
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#include "td/utils/Time.h"
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namespace td {
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QueryCombiner::QueryCombiner(Slice name, double min_delay) : next_query_time_(Time::now()), min_delay_(min_delay) {
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register_actor(name, this).release();
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}
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void QueryCombiner::add_query(int64 query_id, Promise<Promise<Unit>> &&send_query, Promise<Unit> &&promise) {
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LOG(INFO) << "Add query " << query_id << " with" << (promise ? "" : "out") << " promise";
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auto &query = queries_[query_id];
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if (promise) {
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query.promises.push_back(std::move(promise));
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} else if (min_delay_ > 0 && !query.is_sent) {
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// if there is no promise, then noone waits for response
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// we can delay query to not exceed any flood limit
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if (query.send_query) {
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// the query is already delayed
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return;
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}
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query.send_query = std::move(send_query);
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delayed_queries_.push(query_id);
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loop();
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return;
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}
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if (query.is_sent) {
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// just wait for the result
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return;
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}
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if (!query.send_query) {
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query.send_query = std::move(send_query);
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}
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do_send_query(query_id, query);
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}
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void QueryCombiner::do_send_query(int64 query_id, QueryInfo &query) {
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LOG(INFO) << "Send query " << query_id;
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CHECK(query.send_query);
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query.is_sent = true;
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auto send_query = std::move(query.send_query);
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CHECK(!query.send_query);
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next_query_time_ = Time::now() + min_delay_;
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query_count_++;
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send_query.set_value(PromiseCreator::lambda([actor_id = actor_id(this), query_id](Result<Unit> &&result) {
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send_closure(actor_id, &QueryCombiner::on_get_query_result, query_id, std::move(result));
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}));
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}
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void QueryCombiner::on_get_query_result(int64 query_id, Result<Unit> &&result) {
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LOG(INFO) << "Get result of query " << query_id << (result.is_error() ? " error" : " success");
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query_count_--;
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auto it = queries_.find(query_id);
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CHECK(it != queries_.end());
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CHECK(it->second.is_sent);
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auto promises = std::move(it->second.promises);
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queries_.erase(it);
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for (auto &promise : promises) {
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if (result.is_ok()) {
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promise.set_value(Unit());
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} else {
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promise.set_error(result.error().clone());
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}
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}
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loop();
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}
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void QueryCombiner::loop() {
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if (G()->close_flag()) {
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return;
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}
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auto now = Time::now();
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if (now < next_query_time_) {
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set_timeout_in(next_query_time_ - now + 0.001);
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return;
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}
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if (query_count_ != 0) {
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return;
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}
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while (!delayed_queries_.empty()) {
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auto query_id = delayed_queries_.front();
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delayed_queries_.pop();
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auto it = queries_.find(query_id);
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if (it == queries_.end()) {
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continue;
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}
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auto &query = it->second;
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if (query.is_sent) {
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continue;
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}
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do_send_query(query_id, query);
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break;
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}
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}
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} // namespace td
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