55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
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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/actor/actor.h"
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#include "td/utils/common.h"
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#include "td/utils/FlatHashMap.h"
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#include "td/utils/Promise.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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#include <functional>
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#include <queue>
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namespace td {
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// merges queries into a single request
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class QueryMerger final : public Actor {
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public:
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QueryMerger(Slice name, size_t max_concurrent_query_count, size_t max_merged_query_count);
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using MergeFunction = std::function<void(vector<int64> query_ids, Promise<Unit> &&promise)>;
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void set_merge_function(MergeFunction merge_function) {
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merge_function_ = std::move(merge_function);
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}
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void add_query(int64 query_id, Promise<Unit> &&promise);
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private:
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struct QueryInfo {
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vector<Promise<Unit>> promises_;
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};
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size_t query_count_ = 0;
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size_t max_concurrent_query_count_;
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size_t max_merged_query_count_;
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MergeFunction merge_function_;
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std::queue<int64> pending_queries_;
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FlatHashMap<int64, QueryInfo> queries_;
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void send_query(vector<int64> query_ids);
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void on_get_query_result(vector<int64> query_ids, Result<Unit> &&result);
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void loop() final;
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};
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} // namespace td
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