How to create dynamic FIX sessions using Quick Fix

I am explaining about how we can create sessions dynamically through code using QuickFix. My earlier examples were using configuration files. But we can also create session dynamically, this might be helpful when application maintains many sessions, so we can keep session metadata information in xml or database to track or maintain sessions.

You can find code which describe fix initiator and fix acceptor in my earlier post.

Below is code which creates multiple listener sessions in Fix Acceptor:

SessionSettings settings = new SessionSettings();

                SessionID id1 = new SessionID(new BeginString("FIX.4.2"), 
			new SenderCompID("FixServer"), 
			new TargetCompID("Client1"), "Session1");
                Dictionary d = new Dictionary();

                d.setString("ConnectionType", "acceptor");
                d.setLong("SocketAcceptPort", 5001);
                d.setString("FileLogPath", "Log");
                d.setString("StartTime", "00:00:00");
                d.setString("EndTime", "00:00:00");
                d.setString("FileStorePath", @"c:\fixfiles");
                d.setBool("UseDataDictionary", true);
                d.setString("DataDictionary", @"FIX42.xml");

                settings.set(id1,d);

                id1= new SessionID(new BeginString("FIX.4.2"), 
			new SenderCompID("FixServer"), 
			new TargetCompID("Client2"), "Session2");
                d = new Dictionary();

                d.setString("ConnectionType", "acceptor");
                d.setLong("SocketAcceptPort", 5001);
                d.setString("FileLogPath", "Log");
                d.setString("StartTime", "00:00:00");
                d.setString("EndTime", "00:00:00");
                d.setString("FileStorePath", @"c:\fixfiles");
                d.setBool("UseDataDictionary", true);
                d.setString("DataDictionary", @"FIX42.xml");

                settings.set(id1, d);

                                                
                FixServerApplication application = new FixServerApplication();
                FileStoreFactory storeFactory = new FileStoreFactory(settings);
                ScreenLogFactory logFactory = new ScreenLogFactory(settings);
                MessageFactory messageFactory = new DefaultMessageFactory();
                SocketAcceptor acceptor
                  = new SocketAcceptor(application, storeFactory, settings, 
			logFactory, messageFactory);

                acceptor.start();
                Console.WriteLine("press  to quit");
                Console.Read();
                acceptor.stop();

SessionSettings instance accepts dictionary object and SessionID to create new session. Dictionary class maintain key value pair. We can find more about FIX configuration details here.