Spring WebSockets + StompClient

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/updateRoom","/connectToRoom", "/disconnectFromRoom", "/createRoom", "/listOfRoom", "/sendQuestion");
        config.setApplicationDestinationPrefixes("/app");
    }
 
    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/game").withSockJS();
        registry.addEndpoint("/gameRoom").withSockJS();
    }
}

    @RequestMapping(value = "/createGameRoom", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")
    @MessageMapping("/gameRoom")
    @SendTo(value = {"/listOfRoom"})
    public @ResponseBody List<GameRoom> createGameRoom(@RequestBody GameRoom gameRoom) throws DaoException {
        gameRoomService.add(gameRoom);
        return gameRoomService.getAll();
    }

    @MessageMapping({"/gameRoom", "/gameRoom2"})
    @SendTo(value = {"/listOfRoom"})
    public @ResponseBody List<GameRoom> createGameRoom(@RequestBody GameRoom gameRoom) throws DaoException {
        gameRoomService.add(gameRoom);
        return gameRoomService.getAll();
    }
 
    @MessageMapping({"/gameRoom3"})
    @SendTo(value = {"/listOfRoom"})
    public @ResponseBody List<GameRoom> createGameRoom2(@RequestBody GameRoom gameRoom) throws DaoException {
        gameRoomService.add(gameRoom);
        return gameRoomService.getAll();
    }