Pluggable Storage Sample

This sample demonstrates how to use a pluggable session storage.

Source code

PluggableStorage.cpp:

#include "MySessionStorage.h"
 
#include "../Settings/Defaults.h"
#include "../Common/Helpers.h"
#include "../Common/Listener.h"
#include "../Common/Settings.h"
#include "../Common/Signal.h"
#include "../Common/Emulator.h"
 
using namespace Samples;
 
int main(int argc, char* argv[])
{
    // `--help` to show options
    const AppConfiguration<SettingsConfiguration, ConnectivityConfiguration, LogonConfiguration> cfg{"PluggableStorage", argc, argv};
 
    try
    {
        SignalHelper::manageSignals();
 
        auto settings = fillSettings(cfg);
        const auto emulator = createEmulator(settings, cfg);
 
        // Request Binary Order Gateway credentials from Binary Utility Service Gateway
        const auto bgwCredentials = receiveBgwCredentials(settings, cfg.host(), cfg.port());
 
        MySessionStorage storage;
        Listener listener;
 
        settings.ipSessionToken(bgwCredentials.ipSessionToken);
 
        // A 'BGW' session
        Session bgwSession(SessionType::BGW, settings, &listener, SessionStorageType::Pluggable, &storage);
 
        bgwSession.connect(bgwCredentials.host, bgwCredentials.port);
        bgwSession.send(Helper::createTraderLogonRequest(cfg.traderId(), cfg.traderPwd()));
 
        Samples::wait(listener.traderLoggedOn).get();
 
        bgwSession.send(Helper::createOrder(cfg.traderId()));
 
        SignalHelper::waitUntilKey("disconnect the BGW session and terminate the application");
 
        bgwSession.send(Helper::createTraderLogoutRequest(cfg.traderId())).disconnect();
    }
    catch (const std::exception& ex)
    {
        std::cerr << "EXCEPTION: " << ex.what() << std::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) noexcept
    {
        return static_cast<const char*>(message.data());
    }
 
    const char* end(const NetworkMessage message) noexcept
    {
        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 std::runtime_error("Unknown message type");
    }
}
 
MySessionStorage::MySessionStorage():
    inSeqNum_(1),
    outSeqNum_(1),
    id_(std::to_string(IdGenerator::newId())),
    terminated_(false),
    sessionCreationTime_()
{}
 
void MySessionStorage::close(bool doBackup)
{
    std::clog << "\nClose the session storage (doBackup=" << doBackup <<  ").\n";
 
    inSeqNum_ = 1;
    outSeqNum_ = 1;
    terminated_ = false;
    inboundMessages_.clear();
    outboundMessages_.clear();
}
 
const std::string & MySessionStorage::id() const
{
    return id_;
}
 
SeqNumber MySessionStorage::inSeqNum() const
{
    return inSeqNum_;
}
 
void MySessionStorage::inSeqNum(SeqNumber msgSeqNum)
{
    std::clog << "\nSet inSeqNum to " << msgSeqNum << ".\n";
    inSeqNum_ = msgSeqNum;
}
 
SeqNumber MySessionStorage::outSeqNum() const
{
    return outSeqNum_;
}
 
void MySessionStorage::outSeqNum(SeqNumber msgSeqNum)
{
    std::clog << "\nSet outSeqNum to " << msgSeqNum << ".\n";
    outSeqNum_ = msgSeqNum;
}
 
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/ICE/BOE/SessionStorage.h>
 
#include <vector>
#include <list>
 
namespace Samples {
 
using namespace ONIXS_ICEBOE_NAMESPACE;
using namespace ONIXS_ICEBOE_MESSAGING_NAMESPACE;
 
class MySessionStorage final : public SessionStorage
{
public:
    MySessionStorage();
 
    const std::string & id() const override;
 
    SeqNumber inSeqNum() const override;
 
    void inSeqNum(SeqNumber msgSeqNum) override;
 
    SeqNumber outSeqNum() const override;
 
    void outSeqNum(SeqNumber msgSeqNum) override;
 
    Timestamp sessionCreationTime() const override;
 
    void sessionCreationTime(Timestamp) override;
 
    void close(bool doBackup = false) override;
 
    void storeInboundMessage(const NetworkMessage message, SeqNumber msgSeqNum, Timestamp messageReceivingUtcTimestamp = Timestamp()) override;
 
    void storeOutboundMessage(const NetworkMessage message, SeqNumber msgSeqNum, Timestamp messageSendingUtcTimestamp = Timestamp()) override;
 
    void flush() override;
 
    void warmup(size_t, Timestamp) override;
 
    typedef std::vector<char> Message;
    typedef std::list<Message> Messages;
 
private:
    SeqNumber inSeqNum_;
    SeqNumber outSeqNum_;
    std::string id_;
    bool terminated_;
    Timestamp sessionCreationTime_;
 
    Messages inboundMessages_;
    Messages outboundMessages_;
};
 
}