145 lines
4.1 KiB
C++
145 lines
4.1 KiB
C++
// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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#pragma once
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#include "INode.h"
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#include "SynchronizationState.h"
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#include "IBlockchainSynchronizer.h"
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#include "IObservableImpl.h"
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#include "IStreamSerializable.h"
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#include <condition_variable>
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#include <mutex>
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#include <atomic>
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#include <future>
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namespace CryptoNote {
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class BlockchainSynchronizer :
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public IObservableImpl<IBlockchainSynchronizerObserver, IBlockchainSynchronizer>,
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public INodeObserver {
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public:
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BlockchainSynchronizer(INode& node, const crypto::hash& genesisBlockHash);
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~BlockchainSynchronizer();
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// IBlockchainSynchronizer
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virtual void addConsumer(IBlockchainConsumer* consumer) override;
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virtual bool removeConsumer(IBlockchainConsumer* consumer) override;
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virtual IStreamSerializable* getConsumerState(IBlockchainConsumer* consumer) override;
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virtual void start() override;
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virtual void stop() override;
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// IStreamSerializable
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virtual void save(std::ostream& os) override;
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virtual void load(std::istream& in) override;
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// INodeObserver
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virtual void lastKnownBlockHeightUpdated(uint64_t height) override;
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virtual void poolChanged() override;
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private:
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struct GetBlocksResponse {
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uint64_t startHeight;
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std::list<BlockCompleteEntry> newBlocks;
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};
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struct GetBlocksRequest {
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GetBlocksRequest() {
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syncStart.timestamp = 0;
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syncStart.height = 0;
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}
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SynchronizationStart syncStart;
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std::list<crypto::hash> knownBlocks;
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};
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struct GetPoolResponse {
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bool isLastKnownBlockActual;
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std::vector<cryptonote::Transaction> newTxs;
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std::vector<crypto::hash> deletedTxIds;
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};
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struct GetPoolRequest {
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std::vector<crypto::hash> knownTxIds;
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crypto::hash lastKnownBlock;
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};
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enum class State { //prioritized finite states
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idle = 0, //DO
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poolSync = 1, //NOT
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blockchainSync = 2, //REORDER
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stopped = 3 //!!!
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};
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enum class UpdateConsumersResult {
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nothingChanged = 0,
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addedNewBlocks = 1,
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errorOccured = 2
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};
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//void startSync();
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void startPoolSync();
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void startBlockchainSync();
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void onGetBlocksCompleted(std::error_code ec);
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void processBlocks(GetBlocksResponse& response);
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UpdateConsumersResult updateConsumers(const BlockchainInterval& interval, const std::vector<CompleteBlock>& blocks);
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void onGetPoolChanges(std::error_code ec);
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std::error_code processPoolTxs(GetPoolResponse& response);
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///second parameter is used only in case of errors returned into callback from INode, such as aborted or connection lost
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bool setFutureState(State s);
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bool setFutureStateIf(State s, std::function<bool(void)>&& pred);
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void actualizeFutureState();
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bool checkIfShouldStop();
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bool checkIfStopped();
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void workingProcedure();
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GetBlocksRequest getCommonHistory();
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GetPoolRequest getUnionPoolHistory();
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GetPoolRequest getIntersectedPoolHistory();
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typedef std::map<IBlockchainConsumer*, std::shared_ptr<SynchronizationState>> ConsumersMap;
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ConsumersMap m_consumers;
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INode& m_node;
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const crypto::hash m_genesisBlockHash;
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std::vector<crypto::hash> knownTxIds;
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crypto::hash lastBlockId;
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State m_currentState;
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State m_futureState;
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std::unique_ptr<std::thread> workingThread;
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std::future<std::error_code> asyncOperationWaitFuture;
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std::promise<std::error_code> asyncOperationCompleted;
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std::mutex m_consumersMutex;
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std::mutex m_stateMutex;
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bool shouldSyncConsumersPool;
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};
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}
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