Pluggable Storage Sample

This sample demonstrates how to use a pluggable session storage.

Source code

PluggableStorage.cpp:

#include "MySessionStorage.h"

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

using namespace Samples;

int main(int argc, char* argv[])
{
    clog << "CME iLink 3 PluggableStorage Sample." << endl
         << endl;

    int marketSegmentId = 99;
    string host = "127.0.0.1";
    Port port = 49152;

    bool useEmulator = false;

    if (argc < 4)
    {
#if defined(ONIXS_ILINK3_HAS_GATEWAY_EMULATOR)
        useEmulator = true;
#else
        std::cerr << "usage: [MarketSegmentId] [Host] [Port]" << std::endl;
        return 1;
#endif
    }
    else
    {
        marketSegmentId = atoi(argv[1]);
        host = argv[2];
        port = atoi(argv[3]);
    }

    try
    {
        const SessionSettings settings = fillSettings(useEmulator);

#if defined(ONIXS_ILINK3_HAS_GATEWAY_EMULATOR)
        std::unique_ptr<GatewayEmulatorThread> gateway;

        if (useEmulator)
            gateway.reset(new GatewayEmulatorThread(settings.licenseStores(), host, port));
#endif

        MySessionStorage storage;
        Listener listener;

        Session session(settings, marketSegmentId, &listener, SessionStorageType::Pluggable, &storage);

        NewOrderSingle order;
        Helper::setOrderFields(order, PartyDetailsListReqID, DefaultSecurityId, DefaultPriceMantissa);

        if(session.negotiated())
            session.reset(true);

        session
            .connect(host, port)
            .send(order);

        Helper::waitUntilEnterKey("disconnect the session and terminate the application");

        session.disconnect();
    }
    catch (const exception& ex)
    {
        cerr << "EXCEPTION: " << ex.what() << endl;
        return 1;
    }

    return 0;
}

MySessionStorage.cpp:

#include "MySessionStorage.h"

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

namespace Samples
{

namespace
{
    const char* begin(const NetworkMessage& message) ONIXS_ILINK3_NOTHROW
    {
        return static_cast<const char*>(message.data());
    }

    const char* end(const NetworkMessage& message) ONIXS_ILINK3_NOTHROW
    {
        return static_cast<const char*>(advanceByBytes(message.data(), message.size()));
    }

    void storeMessage(MySessionStorage::Messages & storage, const NetworkMessage& message)
    {
        storage.push_back(MySessionStorage::Message(begin(message), end(message)));

        if (!processTypified(message.message(), MessagePrinter()))
            throw runtime_error("Unknown message type");
    }
}

MySessionStorage::MySessionStorage():
    inSeqNum_(1),
    outSeqNum_(1),
    previousSeqNum_(),
    uuid_(Session::UndefinedUuid),
    previousUuid_(Session::UndefinedUuid),
    id_(IdGenerator::newStrId()),
    terminated_(false),
    negotiated_(false),
    sessionCreationTime_()
{}

void MySessionStorage::close(bool doBackup)
{
    std::clog << "\nClose the session storage (doBackup=" << doBackup <<  ").\n";

    inSeqNum_ = 1;
    outSeqNum_ = 1;
    previousSeqNum_ = 0;
    previousUuid_ = 0;
    terminated_ = false;
    negotiated_ = false;
    inboundMessages_.clear();
    outboundMessages_.clear();
}

const std::string & MySessionStorage::id() const
{
    return id_;
}

UInt64 MySessionStorage::uuid() const
{
    return uuid_;
}

void MySessionStorage::uuid(UInt64 value)
{
    std::clog << "\nSet uuid to " << value << ".\n";
    uuid_ = value;
}

UInt64 MySessionStorage::previousUuid() const
{
    return previousUuid_;
}

void MySessionStorage::previousUuid(UInt64 value)
{
    std::clog << "\nSet previousUuid to " << value << ".\n";
    previousUuid_ = value;
}

SeqNumber MySessionStorage::inSeqNum() const
{
    return inSeqNum_;
}

void MySessionStorage::inSeqNum(SeqNumber msgSeqNum)
{
    std::clog << "\nSet inSeqNum to " << msgSeqNum << ".\n";
    inSeqNum_ = msgSeqNum;
}

SeqNumber MySessionStorage::previousSeqNum() const
{
    return previousSeqNum_;
}

void MySessionStorage::previousSeqNum(SeqNumber msgSeqNum)
{
    std::clog << "\nSet previousSeqNum to " << msgSeqNum << ".\n";
    previousSeqNum_ = msgSeqNum;
}

SeqNumber MySessionStorage::outSeqNum() const
{
    return outSeqNum_;
}

void MySessionStorage::outSeqNum(SeqNumber msgSeqNum)
{
    std::clog << "\nSet outSeqNum to " << msgSeqNum << ".\n";
    outSeqNum_ = msgSeqNum;
}

bool MySessionStorage::negotiated() const
{
    return negotiated_;
}

void MySessionStorage::negotiated(bool status)
{
    std::clog << "\nSet negotiated to " << status << ".\n";
    negotiated_ = status;
}

Timestamp MySessionStorage::sessionCreationTime() const
{
    return sessionCreationTime_;
}

void MySessionStorage::sessionCreationTime(Timestamp time)
{
    std::clog << "\nSet sessionCreationTime to " << time << "\n";
    sessionCreationTime_ = time;
}

void MySessionStorage::storeInboundMessage(const NetworkMessage& message, SeqNumber msgSeqNum, Timestamp)
{
    std::clog << "\nStore inbound message:\n";
    storeMessage(inboundMessages_, message);

    inSeqNum_ = msgSeqNum;
}

void MySessionStorage::storeOutboundMessage(const NetworkMessage& message, SeqNumber msgSeqNum, Timestamp)
{
    std::clog << "\nStore outbound message:\n";
    storeMessage(outboundMessages_, message);

    outSeqNum_ = msgSeqNum;
}

void MySessionStorage::flush()
{
}

void MySessionStorage::warmup(size_t, Timestamp)
{
}

}

MySessionStorage.h:

#include <OnixS/CME/iLink3/SessionStorage.h>

#include <vector>
#include <list>

namespace Samples
{

using namespace OnixS::CME::iLink3::Messaging;

class MySessionStorage : public SessionStorage
{
public:

    MySessionStorage();

    const std::string & id() const ONIXS_ILINK3_OVERRIDE;

    UInt64 uuid() const ONIXS_ILINK3_OVERRIDE;

    void uuid(UInt64 value) ONIXS_ILINK3_OVERRIDE;

    UInt64 previousUuid() const ONIXS_ILINK3_OVERRIDE;

    void previousUuid(UInt64 value) ONIXS_ILINK3_OVERRIDE;

    SeqNumber inSeqNum() const ONIXS_ILINK3_OVERRIDE;

    void inSeqNum(SeqNumber msgSeqNum) ONIXS_ILINK3_OVERRIDE;

    SeqNumber previousSeqNum() const ONIXS_ILINK3_OVERRIDE;

    void previousSeqNum(SeqNumber msgSeqNum) ONIXS_ILINK3_OVERRIDE;

    SeqNumber outSeqNum() const ONIXS_ILINK3_OVERRIDE;

    void outSeqNum(SeqNumber msgSeqNum) ONIXS_ILINK3_OVERRIDE;

    bool negotiated() const ONIXS_ILINK3_OVERRIDE;

    void negotiated(bool status) ONIXS_ILINK3_OVERRIDE;

    Timestamp sessionCreationTime() const ONIXS_ILINK3_OVERRIDE;

    void sessionCreationTime(Timestamp) ONIXS_ILINK3_OVERRIDE;

    void close(bool doBackup = false) ONIXS_ILINK3_OVERRIDE;

    void storeInboundMessage(const NetworkMessage& message, SeqNumber msgSeqNum, Timestamp messageReceivingUtcTimestamp = Timestamp()) ONIXS_ILINK3_OVERRIDE;

    void storeOutboundMessage(const NetworkMessage& message, SeqNumber msgSeqNum, Timestamp messageSendingUtcTimestamp = Timestamp()) ONIXS_ILINK3_OVERRIDE;

    void flush() ONIXS_ILINK3_OVERRIDE;

    void warmup(size_t, Timestamp) ONIXS_ILINK3_OVERRIDE;

    typedef std::vector<char> Message;
    typedef std::list<Message> Messages;

private:

    SeqNumber inSeqNum_;
    SeqNumber outSeqNum_;
    SeqNumber previousSeqNum_;
    UInt64 uuid_;
    UInt64 previousUuid_;
    std::string id_;
    bool terminated_;
    bool negotiated_;
    Timestamp sessionCreationTime_;

    Messages inboundMessages_;
    Messages outboundMessages_;
};

}