virtual int add_client_listener(IClientListener *listener_param);
virtual int send_message_and_request_response(const char *msg_req_param);
virtual int send_message_and_wait_response(const char *msg_req_param, char **msg_rsp_param);
virtual int add_client_listener(IClientListener *listener_param);
virtual int send_message_and_request_response(const char *msg_req_param);
virtual int send_message_and_wait_response(const char *msg_req_param, char **msg_rsp_param);