on_demand_ordering_service_impl.hpp

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#ifndef IROHA_ON_DEMAND_ORDERING_SERVICE_IMPL_HPP
#define IROHA_ON_DEMAND_ORDERING_SERVICE_IMPL_HPP

#include "ordering/on_demand_ordering_service.hpp"

#include <map>
#include <shared_mutex>

#include <tbb/concurrent_unordered_set.h>
#include "interfaces/iroha_internal/unsafe_proposal_factory.hpp"
#include "logger/logger_fwd.hpp"
#include "multi_sig_transactions/hash.hpp"
// TODO 2019-03-15 andrei: IR-403 Separate BatchHashEquality and MstState
#include "multi_sig_transactions/state/mst_state.hpp"
#include "ordering/impl/on_demand_common.hpp"
#include "ordering/ordering_service_proposal_creation_strategy.hpp"

namespace iroha {
  namespace ametsuchi {
    class TxPresenceCache;
  }
  namespace ordering {
    namespace detail {
      using BatchSetType = tbb::concurrent_unordered_set<
          transport::OdOsNotification::TransactionBatchType,
          model::PointerBatchHasher,
          shared_model::interface::BatchHashEquality>;

      using ProposalMapType = std::map<
          consensus::Round,
          std::shared_ptr<const transport::OdOsNotification::ProposalType>>;
    }  // namespace detail

    class OnDemandOrderingServiceImpl : public OnDemandOrderingService {
     public:
      OnDemandOrderingServiceImpl(
          size_t transaction_limit,
          std::shared_ptr<shared_model::interface::UnsafeProposalFactory>
              proposal_factory,
          std::shared_ptr<ametsuchi::TxPresenceCache> tx_cache,
          std::shared_ptr<ProposalCreationStrategy> proposal_creation_strategy,
          logger::LoggerPtr log,
          size_t number_of_proposals = 3);

      // --------------------- | OnDemandOrderingService |_---------------------

      void onCollaborationOutcome(consensus::Round round) override;

      // ----------------------- | OdOsNotification | --------------------------

      void onBatches(CollectionType batches) override;

      boost::optional<std::shared_ptr<const ProposalType>> onRequestProposal(
          consensus::Round round) override;

     private:
      void packNextProposals(const consensus::Round &round);

      using TransactionsCollectionType =
          std::vector<std::shared_ptr<shared_model::interface::Transaction>>;

      void tryCreateProposal(
          consensus::Round round,
          const TransactionsCollectionType &txs,
          shared_model::interface::types::TimestampType created_time);

      void tryErase(const consensus::Round &current_round);

      bool batchAlreadyProcessed(
          const shared_model::interface::TransactionBatch &batch);

      size_t transaction_limit_;

      size_t number_of_proposals_;

      detail::ProposalMapType proposal_map_;

      detail::BatchSetType pending_batches_;

      std::shared_timed_mutex batches_mutex_, proposals_mutex_;

      std::shared_ptr<shared_model::interface::UnsafeProposalFactory>
          proposal_factory_;

      std::shared_ptr<ametsuchi::TxPresenceCache> tx_cache_;

      std::shared_ptr<ProposalCreationStrategy> proposal_creation_strategy_;

      logger::LoggerPtr log_;
    };
  }  // namespace ordering
}  // namespace iroha

#endif  // IROHA_ON_DEMAND_ORDERING_SERVICE_IMPL_HPP