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validator/db/blockdb.hpp

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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 "ton/ton-types.h"
+#include "validator/interfaces/block-handle.h"
+#include "validator/interfaces/db.h"
+#include "td/db/KeyValueAsync.h"
+
+namespace ton {
+
+namespace validator {
+
+class RootDb;
+
+class BlockDb : public td::actor::Actor {
+ public:
+  void store_block_handle(BlockHandle handle, td::Promise<td::Unit> promise);
+  void get_block_handle(BlockIdExt id, td::Promise<BlockHandle> promise);
+
+  void start_up() override;
+  void alarm() override;
+
+  void gc();
+  void skip_gc();
+
+  BlockDb(td::actor::ActorId<RootDb> root_db, std::string db_path);
+
+ private:
+  using KeyHash = td::Bits256;
+  struct DbEntry {
+    BlockIdExt block_id;
+    KeyHash prev;
+    KeyHash next;
+
+    DbEntry(tl_object_ptr<ton_api::db_blockdb_lru> entry);
+    DbEntry() {
+    }
+    DbEntry(BlockIdExt block_id, KeyHash prev, KeyHash next) : block_id(block_id), prev(prev), next(next) {
+    }
+    tl_object_ptr<ton_api::db_blockdb_lru> release();
+    bool is_empty() const {
+      return !block_id.is_valid();
+    }
+  };
+  static KeyHash get_block_lru_key(BlockIdExt block_id);
+  static KeyHash get_block_value_key(BlockIdExt block_id);
+  static KeyHash get_block_lru_empty_key_hash() {
+    return KeyHash::zero();
+  }
+
+  td::Result<DbEntry> get_block_lru(KeyHash key);
+  td::Result<td::BufferSlice> get_block_value(KeyHash key);
+
+  void set_block_lru(KeyHash key_hash, DbEntry e);
+  void set_block_value(KeyHash key_hash, td::BufferSlice data);
+
+  std::shared_ptr<td::KeyValue> kv_;
+
+  td::actor::ActorId<RootDb> root_db_;
+
+  std::string db_path_;
+
+  KeyHash last_gc_ = KeyHash::zero();
+};
+
+}  // namespace validator
+
+}  // namespace ton