Spring WebSockets加入另一个聊天室

Question

我使用Spring和WebSockets实现了一个控制台应用程序。如果一个或多个参与者连接到像这样的anotated的基本方法，该应用程序可以正常工作。

@MessageMapping("/chat")
@SendTo("/topic/messages")

我将复制配置和我所做的实现更清楚。

@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/chat").withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/topic");
        config.setApplicationDestinationPrefixes("/app");
    }

}

@Controller
public class ChatController {

    @MessageMapping("/chat")
    @SendTo("/topic/messages")
    public OutputMessage send(@Payload Message message) {
        return new OutputMessage(message.getFrom(), message.getText());
    }

    @MessageMapping("/chat/{room}")
    @SendTo("/topic/messages/{room}")
    public OutputMessage enableChatRooms(@DestinationVariable String room, @Payload Message message) {
        return new OutputMessage(message.getFrom(), message.getText());
    }

}

@Service
public class SessionHandlerService extends StompSessionHandlerAdapter {

    private String nickName;

    public SessionHandlerService() {
        this.nickName = "user";
    }

    private void sendJsonMessage(StompSession session) {
        ClientMessage msg = new ClientMessage(nickName, " new user has logged in.");
        session.send("/app/chat", msg);
    }

    @Override
    public Type getPayloadType(StompHeaders headers) {
        return ServerMessage.class;
    }

    @Override
    public void handleFrame(StompHeaders headers, Object payload) {
        System.err.println(payload.toString());
    }

    @Override
    public void afterConnected(StompSession session, StompHeaders connectedHeaders) {
        session.subscribe("/topic/messages", new SessionHandlerService());
        sendJsonMessage(session);
    }
}

我面临的问题是，当我订阅/topic/messages和session.send("/app/chat", msg);时，一切正常。但是，如果我选择session.send("/app/chat/room1", msg);和/topic/messages/room1之类的内容，参与者就无法看到彼此的消息，就像他们在不同的聊天室中一样。