系统的消息消费者组件处理每条消息并使用 WebSockets 异步通知看护者应用程序

Question

我正在尝试通过 websocket 从 rabbitmq 的消费者发送一些通知，并将它们发布到 angular 应用程序上。

我是 rabbitmq 和 websocket 的新手，我不知道如何配置 websocket 以从消费者那里获取消息

这是我的消费者：

@Override
@RabbitListener(queues = "${rabbitmq.queue}")
public void onMessage(Message message) {
    String timi = new String(message.getBody());
    JsonObject jsonObject = new Gson().fromJson(timi, JsonObject.class);

    MonitoredData monitoredData = new MonitoredData();
    monitoredData.setIdPatient((jsonObject.get("Id patient")).getAsString());
    monitoredData.setActivity((jsonObject.get("Activity")).getAsString());
    monitoredData.setStartTime((jsonObject.get("Start time")).getAsString());
    monitoredData.setEndTime((jsonObject.get("End time")).getAsString());
    monitoredDataRepo.save(monitoredData);

    if (monitoredData.getActivity().contains("Sleeping")) {
        DateTimeFormatter f = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime date1 = LocalDateTime.from(f.parse(monitoredData.getStartTime()));
        LocalDateTime date2 = LocalDateTime.from(f.parse(monitoredData.getEndTime()));
        Duration d = Duration.between(date1, date2);
        if ((d.getSeconds() / 3600) > 9) {
            System.out.println("The patient slept more than 9 hours");
        }
    }

    if (monitoredData.getActivity().contains("Leaving\t")) {
        DateTimeFormatter f = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime date1 = LocalDateTime.from(f.parse(monitoredData.getStartTime()));
        LocalDateTime date2 = LocalDateTime.from(f.parse(monitoredData.getEndTime()));
        Duration d = Duration.between(date1, date2);
        if ((d.getSeconds() / 3600) > 3) {
            System.out.println("The patient was out more than 3 hours");
        }
    }

    if (monitoredData.getActivity().contains("Toileting\t") || monitoredData.getActivity().contains("Showering\t")) {
        DateTimeFormatter f = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime date1 = LocalDateTime.from(f.parse(monitoredData.getStartTime()));
        LocalDateTime date2 = LocalDateTime.from(f.parse(monitoredData.getEndTime()));
        Duration d = Duration.between(date1, date2);
        if ((d.getSeconds() / 60) >= 30) {
            System.out.println("The patient was in the bathroom more than 30 minutes");
        }
    }

// System.out.println("Received message" + 消息); }

我从 System.out.println 获取的消息是我想在 Angular 应用程序中弹出的消息。

我也有这个兔子控制器：

@GetMapping("/send")
public String sendMessage() throws InterruptedException {
    producer.produceMsg();
    return "Message successfully sent";
}

Answer 1

我也是 RabbitMq 的新手，但这是我对 WebSocket 的配置。

  @Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
    static final String MESSAGE_PREFIX = "/topic";

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/gs-guide-websocket").setAllowedOrigins("*").withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry) {
        registry.enableSimpleBroker(MESSAGE_PREFIX, "/queue");
        registry.setApplicationDestinationPrefixes("/app");
    }
}

在消费者中class你可以注入SimpMessagingTemplate websocket；然后你可以在 RabbitListener 中使用这个： this.websocket.convertAndSend("/主题" , json);

至于前端部分，我用的是React，但我觉得差不多。您可以 google sockJs 并尝试接收消息。祝你好运！

系统的消息消费者组件处理每条消息并使用 WebSockets 异步通知看护者应用程序

The message consumer component of the system processes each message and notifies asynchronously using WebSockets the caregiver application

java

spring-websocket

spring-rabbit