CLxCommandNotifier class can be used to create custom notifiers for use in commands.

cmdNotifier.cpp

#include <lxu_command.hpp>

class CustomNotifier : public CLxCommandNotifier
{
public:
	CustomNotifier ();
	virtual		~CustomNotifier () {}
	
	virtual void		cn_Parse (std::string &args) {};
	virtual unsigned int	cn_Flags (int code) { return LXfCMDNOTIFY_VALUE; };
};

static const char *notifierName = "custom.notifier";
	
CustomNotifier::CustomNotifier ()
	: CLxCommandNotifier (notifierName)
{
}

	template<class T>
	void initializeCommandNotifier( const char* name )
	{
		CLxGenericPolymorph *srv = new CLxPolymorph<T>;
		srv->AddInterface(new CLxIfc_Notifier<T>);

		lx::AddServer(name, srv);
	}

void initialize()
{
	initializeCommandNotifier<CustomNotifier>(notifierName);
}

/* This is how a notification can be sent using custom notifier to notify all the clients.
   This can be done from the basic_Execute() commands' method.
 */
CLxCommandNotifier::Notify (symmetryStateNotifierName, 0);

/* And this is how a command can subscribe to get events from the custom notifier.
   Each command's argument can subscribe to different notifiers. In this case
   we add the custom notifier for argument 0.
 */
bool OtherCommand::basic_Notifier ( int index, std::string &name, std::string &args)
{
	bool result = false;
	if (index == 0) {
		name = notifierName;
		result = true;
	}
	
	return result;
}