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adnl/adnl-query.h

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+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#pragma once
+
+#include "td/actor/actor.h"
+#include "common/bitstring.h"
+#include "td/utils/buffer.h"
+
+#include <functional>
+
+namespace ton {
+
+namespace adnl {
+
+class AdnlPeerPair;
+
+using AdnlQueryId = td::Bits256;
+
+class AdnlQuery : public td::actor::Actor {
+ public:
+  static td::actor::ActorId<AdnlQuery> create(td::Promise<td::BufferSlice> promise,
+                                              std::function<void(AdnlQueryId)> destroy, std::string name,
+                                              td::Timestamp timeout, AdnlQueryId id) {
+    return td::actor::create_actor<AdnlQuery>("query", name, std::move(promise), std::move(destroy), timeout, id)
+        .release();
+  }
+  static AdnlQueryId random_query_id();
+  AdnlQuery(std::string name, td::Promise<td::BufferSlice> promise, std::function<void(AdnlQueryId)> destroy,
+            td::Timestamp timeout, AdnlQueryId id)
+      : name_(std::move(name)), timeout_(timeout), promise_(std::move(promise)), destroy_(std::move(destroy)), id_(id) {
+  }
+  void alarm() override;
+  void result(td::BufferSlice data);
+  void start_up() override {
+    alarm_timestamp() = timeout_;
+  }
+  void tear_down() override {
+    destroy_(id_);
+  }
+
+ private:
+  std::string name_;
+  td::Timestamp timeout_;
+  td::Promise<td::BufferSlice> promise_;
+  std::function<void(AdnlQueryId)> destroy_;
+  AdnlQueryId id_;
+};
+
+}  // namespace adnl
+
+}  // namespace ton