parsec/ticket_machine/client.hpp

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// Copyright (c) 2021 MIT Digital Currency Initiative,
//                    Federal Reserve Bank of Boston
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef OPENCBDC_TX_SRC_PARSEC_TICKET_MACHINE_CLIENT_H_
#define OPENCBDC_TX_SRC_PARSEC_TICKET_MACHINE_CLIENT_H_
 
#include "interface.hpp"
#include "messages.hpp"
#include "util/rpc/tcp_client.hpp"
 
namespace cbdc::parsec::ticket_machine::rpc {
    class client : public interface {
      public:
        explicit client(std::vector<network::endpoint_t> endpoints);
 
        client() = delete;
        ~client() override = default;
        client(const client&) = delete;
        auto operator=(const client&) -> client& = delete;
        client(client&&) = delete;
        auto operator=(client&&) -> client& = delete;
 
        auto init() -> bool;
 
        auto get_ticket_number(get_ticket_number_callback_type result_callback)
            -> bool override;
 
      private:
        std::unique_ptr<cbdc::rpc::tcp_client<request, response>> m_client;
        std::queue<ticket_number_type> m_tickets;
        bool m_fetching_tickets{false};
 
        mutable std::mutex m_mut;
 
        std::queue<get_ticket_number_callback_type> m_callbacks;
 
        auto fetch_tickets() -> bool;
 
        void handle_ticket_numbers(ticket_number_range_type range);
    };
}
 
#endif