Establishing FIX Connection

Establishing Connection

To establish the a FIX connection as an Acceptor the OnixS::FIX::Session::logonAsAcceptor method must be used.

To establish the a FIX connection as an Initiator the OnixS::FIX::Session::logonAsInitiator method must be used.

Closing Connection

To disconnect the session OnixS::FIX::Session::logout method must be used. This member implements a graceful closing of the FIX connection as defined by the Standard.

Connection and Session Lifetime

A single FIX session can exist across multiple sequential (not concurrent) physical connections. Parties can connect and disconnect multiple times while maintaining a single FIX session. That is, once the OnixS::FIX::Session::logout method is called, the FIX Connection is terminated however the FIX session life continues. It is possible to continue the same session later using either OnixS::FIX::Session::logonAsAcceptor or OnixS::FIX::Session::logonAsInitiator methods again. In other words, a FIX Session is comprised of one or more FIX connections.

Example

#include <OnixS/FIXEngine.h>

using namespace OnixS::FIX; 
using namespace OnixS::FIX::FIX40;

const string SENDER_COMP_ID = "SenderCompID";
const string TARGET_COMP_ID = "TargetCompID";
const Version VERSION = FIX_40;

const string HOST = "Localhost";

// Target port is equal to acceptor's port to create a loop back FIX session.
int ACCEPTOR_PORT = Engine::instance()->getListenPort();

ISessionListener listener;

Session acceptor(TARGET_COMP_ID, SENDER_COMP_ID, VERSION, &listener);

Session initiator(SENDER_COMP_ID, TARGET_COMP_ID, VERSION, &listener);

acceptor.logonAsAcceptor(); 

// Sends the Logon message and waits for the acknowledgment Logon.
initiator.logonAsInitiator(HOST, ACCEPTOR_PORT); 

// Message exchange and processing logic goes here..

// Sends the Logout message and waits for the confirming Logout.
acceptor.logout(); 

initiator.logout();

// Frees allocated resources.
initiator.shutdown();
acceptor.shutdown();