如何从 spring 启动将事件发布到 angular js 1.4

Question

场景： 客户端（angular js 1.4）将调用 Rest 端点来获取数据，服务器（spring 引导）将处理文件列表并将 return 准确数据。为了处理文件列表，服务器将根据文件的数量花费时间。所以我已经实现了 STOMP 通知，以便向客户端发送通知说 "List of files have been processed and here is the bunch of files(result)"。

问题： Stomp连接建立成功，客户端也订阅了，但是当服务器发布事件时，客户端无法接收。

下面是我的代码片段：

WebSocketConfig.java

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

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

  @Override
  public void configureMessageBroker(MessageBrokerRegistry registry) {
    registry.setApplicationDestinationPrefixes("/app");
    registry.enableSimpleBroker("/topic"); // Enables a simple in-memory broker
  }
}

SocketController.java

   @Controller
    public class SocketController {
    @SendTo("/topic/public")
        public String sendMessage() {
            LOGGER.info("====> chatMessage()");
            return "List updated successfully";
        }
    }

main.js

connect() {
                var socket = new SockJS('/ws');
                var stompClient = Stomp.over(socket);
                event.preventDefault();
                console.log("socket: ", socket);
                console.log("stompClient: ", stompClient);

                stompClient.connect({}, function (frame) {
                        console.log('Connected: ' + frame);   
                        stompClient.subscribe('/topic/public', function (payload) {
                        console.log("payload: ", payload);
                        var message = JSON.parse(payload.body);
                        console.log("message: ", message);
                        });
                    }, function (error) {
                     console.log("onError() called");
                                console.log("error: ",error);
                    });
        };

使用的脚本：

<script src="https://cdnjs.cloudflare.com/ajax/libs/sockjs-client/1.1.4/sockjs.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/stomp.js/2.3.3/stomp.min.js"></script>

main.js 的 connect() 方法在单击按钮时被调用。我猜可能存在范围问题。

Answer 1

使用 SimpMessagingTemplate 将消息转换并发送到特定主题。

@Controller
public class SocketController {

    private static final Logger LOGGER = LoggerFactory.getLogger(SocketController.class);

    @Autowired private SimpMessagingTemplate template;

    public void sendMessage(String message) {
        LOGGER.info("====> sendMessage:");
        this.template.convertAndSend("/topic/public", message);
    }
}

如何从 spring 启动将事件发布到 angular js 1.4

How to publish event to angular js 1.4 from spring boot

java

angularjs

spring-boot

sockjs