IXWebSocket/ws/ws_cobra_subscribe.cpp

/*
 *  ws_cobra_subscribe.cpp
 *  Author: Benjamin Sergeant
 *  Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
 */

#include <iostream>
#include <sstream>
#include <chrono>
#include <thread>
#include <atomic>
#include <ixcobra/IXCobraConnection.h>

#include <spdlog/spdlog.h>

namespace ix
{
    int ws_cobra_subscribe_main(const std::string& appkey,
                                const std::string& endpoint,
                                const std::string& rolename,
                                const std::string& rolesecret,
                                const std::string& channel,
                                const std::string& filter,
                                bool quiet)
    {

        ix::CobraConnection conn;
        conn.configure(appkey, endpoint,
                       rolename, rolesecret,
                       ix::WebSocketPerMessageDeflateOptions(true));
        conn.connect();

        Json::FastWriter jsonWriter;

        // Display incoming messages
        std::atomic<int> msgPerSeconds(0);
        std::atomic<int> msgCount(0);
        
        auto timer = [&msgPerSeconds, &msgCount]
        {
            while (true)
            {
                std::cout << "#messages " << msgCount << " "
                          << "msg/s " << msgPerSeconds
                          << std::endl;

                msgPerSeconds = 0;
                auto duration = std::chrono::seconds(1);
                std::this_thread::sleep_for(duration);
            }
        };

        std::thread t(timer);

        conn.setEventCallback(
            [&conn, &channel, &jsonWriter, &filter, &msgCount, &msgPerSeconds, &quiet]
            (ix::CobraConnectionEventType eventType,
             const std::string& errMsg,
             const ix::WebSocketHttpHeaders& headers,
             const std::string& subscriptionId)
            {
                if (eventType == ix::CobraConnection_EventType_Open)
                {
                    spdlog::info("Subscriber connected");

                    for (auto it : headers)
                    {
                        spdlog::info("{}: {}", it.first, it.second);
                    }
                }
                else if (eventType == ix::CobraConnection_EventType_Authenticated)
                {
                    spdlog::info("Subscriber authenticated");
                    conn.subscribe(channel, filter,
                                   [&jsonWriter, &quiet,
                                    &msgPerSeconds, &msgCount](const Json::Value& msg)
                                   {
                                       if (!quiet)
                                       {
                                           std::cout << jsonWriter.write(msg) << std::endl;
                                       }

                                       msgPerSeconds++;
                                       msgCount++;
                                   });
                }
                else if (eventType == ix::CobraConnection_EventType_Subscribed)
                {
                    spdlog::info("Subscriber: subscribed to channel {}", subscriptionId);
                }
                else if (eventType == ix::CobraConnection_EventType_UnSubscribed)
                {
                    spdlog::info("Subscriber: unsubscribed from channel {}", subscriptionId);
                }
                else if (eventType == ix::CobraConnection_EventType_Error)
                {
                    spdlog::error("Subscriber: error {}", errMsg);
                }
            }
        );

        while (true)
        {
            std::chrono::duration<double, std::milli> duration(10);
            std::this_thread::sleep_for(duration);
        }

        return 0;
    }
}