@RequestMapping(value = "/speaker-room-event-list/{speakerId}", method = RequestMethod.GET)
    @ResponseBody
    public RoomEventListResponse speakerRoomEventList(
            @PathVariable(value = "speakerId") final String speakerIdStr
    ) {
        Boolean success = true;
        String errorMessage = null;
        List<RoomEvent> roomEventList = null;

        Long speakerId = null;
        try {
            speakerId = controllerUtils.convertStringToLong(speakerIdStr, true);
            roomEventList = roomEventPresenter.findRoomEventsBySpeakerId(speakerId);
        } catch (UrlParameterException e) {
            success = false;
            errorMessage = "Speaker ID is wrong or empty";
        }

        return new RoomEventListResponse(success, errorMessage, roomEventList);
    }