#ifndef __ECHO_CALLBACK_IDL__
#define __ECHO_CALLBACK_IDL__


module cb {

  interface CallBack {

    void call_back(in string mesg);

  };


  interface Server {

    // Server calls back to client just once in a
    // recursive call before returning.
    void one_time(in CallBack cb, in string mesg);

    // Server remembers the client's reference, and
    // will call the call-back periodically.  It stops
    // only when shutdown, or a call to the client fails.
    void register(in CallBack cb, in string mesg,
		  in unsigned short period_secs);

    // Shuts down the server.
    void shutdown();

  };

};


#endif