}
public void startListening(){
final ServerSocketChannelFactory cf = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool());
final ServerBootstrap server = new ServerBootstrap(cf);
server.setPipelineFactory(new FIXAcceptorPipelineFactory(
headerFields,
trailerFields,
isDebugOn,
logonManager,
sessions,