External Thread Sample

This sample connects to the pre-defined host and port (acts as a FIX Initiator). When the session is established, the SingleOrder - New FIX message is sent to the counterparty. This is done using the ExternalThread threading model.

---

Source code:

• Listener.h
• Listener.cpp
• ExternalThread.cpp

---

Listener.h:

#include <OnixS/FIXEngine.h>

class Listener : public OnixS::FIX::ISessionListener
{
public:
    Listener() ONIXS_FIXENGINE_NOTHROW : finished_(false) {}
    ~Listener() ONIXS_FIXENGINE_OVERRIDE ONIXS_FIXENGINE_DEFAULT;

    bool finished() const ONIXS_FIXENGINE_NOTHROW
    {
        return finished_;
    }

    /// Is called when the application-level message is received from the counterparty.
    void onInboundApplicationMsg(Message & msg, Session * sn) ONIXS_FIXENGINE_FINAL;

    /// Is called when the session-level message is received from the counterparty.
    void onInboundSessionMsg(Message & msg, Session * sn) ONIXS_FIXENGINE_FINAL;

    void onStateChange(SessionState::Enum newState, SessionState::Enum prevState, Session * sn) ONIXS_FIXENGINE_FINAL;

    void onError(ErrorReason::Enum reason, const std::string & description, Session * sn) ONIXS_FIXENGINE_FINAL;
    void onWarning(WarningReason::Enum reason, const std::string & description, Session * sn) ONIXS_FIXENGINE_FINAL;

private:
    bool finished_;
};

Listener.cpp:

#include "Listener.h"

#include "../../Common/Helpers.h"
#include "../../Common/Settings.h"

using namespace Settings;

void Listener::onInboundApplicationMsg(Message & msg, Session *)
{
    std::clog << "\nIncoming application-level message:\n" << msg << std::endl;
}

void Listener::onInboundSessionMsg(Message & msg, Session *)
{
    std::clog << "\nIncoming session-level message:\n" << msg << std::endl;
}

void Listener::onStateChange(SessionState::Enum newState, SessionState::Enum prevState, Session *)
{
    std::clog
        << "\nSession's state is changed, prevState="
        << SessionState::toString(prevState)
        << ", newState="
        << SessionState::toString(newState)
        << std::endl;

    if(newState == SessionState::Disconnected)
        finished_ = true;
}

void Listener::onError(ErrorReason::Enum, const std::string & description, Session *)
{
    std::cerr << "\nSession-level error:" << description << std::endl;
    finished_ = true;
}

void Listener::onWarning(WarningReason::Enum, const std::string & description, Session *)
{
    std::cerr << "\nSession-level warning:" << description << std::endl;
}

ExternalThread.cpp:

#include "Listener.h"

#include "../../Common/Helpers.h"
#include "../../Common/Settings.h"

using namespace Settings;

int main()
{
    std::clog << "ExternalThread sample." << std::endl << std::endl;

    try
    {
        manageLinuxSignals();

        EngineSettings settings;

        settings.listenPort(ListenPort)
                .licenseStore(LicenseStore);

        TCPStandard::Stack stack;

        Engine::init(settings, &stack);

        Listener acceptorListener;
        Session acceptor(&stack, TargetCompId, SenderCompId, FixProtocolVersion, &acceptorListener);
        acceptor.logonAsAcceptor();

        Listener initiatorListener;
        Session initiator(&stack, SenderCompId, TargetCompId, FixProtocolVersion, &initiatorListener);

        const bool setResetSeqNumFlagOnLogon = true;
        const int heartBtInt = 30;

        SharedFuture<void> logonTask = initiator.logonAsInitiatorAsync("localhost", ListenPort, heartBtInt, ONIXS_FIXENGINE_NULLPTR, setResetSeqNumFlagOnLogon);

        while(!logonTask.isReady())
            stack.dispatchEvents();

        std::clog << "Press any key to send an order, disconnect the session and terminate the application." << std::endl;

        while(!acceptorListener.finished() && !initiatorListener.finished() && !keyPressed())
            stack.dispatchEvents();

        Message order("D", FixProtocolVersion);
        setOrderFields(&order);

        initiator.send(&order);

        SharedFuture<void> logoutTask = initiator.logoutAsync("The session is disconnected");

        while(!logoutTask.isReady() || !initiatorListener.finished())
            stack.dispatchEvents();

        initiator.shutdown();
        acceptor.shutdown();
        Engine::shutdown();

        while(!stack.isQuiescent())
            stack.dispatchEvents();
    }
    catch(const std::exception & ex)
    {
        processSampleException(ex.what());
        return 1;
    }

    return 0;
}