我的Spring启动应用程序中有以下WebSocketConfig:
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/ws").setAllowedOrigins("*").withSockJS();
}
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
registry.setApplicationDestinationPrefixes("/app");
registry.enableSimpleBroker("/topic");
}
}
和我控制器中的代码:
@Autowired
private SimpMessagingTemplate template;
@Scheduled(fixedRate = 5000)
public void getMessage() {
System.out.println("scheduled");
this.template.convertAndSend("/topic/updateService", "Hello");
}
我正在尝试使用我的javascript应用程序以这种方式阅读这些消息:
let socket = new SockJS(`https://localhost:8443/ws`);
let stompClient = Stomp.over(socket);
stompClient.connect({}, () => {
stompClient.subscribe('/topic/updateService', (data) => {
console.log("New message!");
console.log(data);
});
}, () => {
console.log('failed');
});
虽然我订阅了/ updateService,但我无法收到任何消息。
控制台日志显示一切正常:
虽然在我的Spring启动应用程序中,我在控制台中看到scheduled
,但我的客户端没有收到任何消息。
任何可能出错的想法?
答案 0 :(得分:0)
抱歉,我没有足够的声誉对你的帖子发表评论,所以我会回复。
您可以在application.properties
中启用日志记录,以查看WS连接实际发生的情况。
logging.level.org.springframework.messaging=trace
logging.level.org.springframework.web.socket=trace
connected to server undefined
并不代表出现问题。每行都会显示此行。
我试图重现你的问题,它在我身边很好用。您是否有其他路由或安全配置(我注意到http s 和自定义端口)?以下是您需要检查的代码:
控制器:
@Controller
public class SomeController {
@Autowired
private SimpMessagingTemplate simpMessagingTemplate;
@Scheduled(fixedDelay = 1000)
private void send() {
simpMessagingTemplate.convertAndSend("/topic/updateService", "Hello");
}
}
主要应用程序& Websocket配置(不要忘记@EnableWebSocketMessageBroker
):
@SpringBootApplication
@EnableScheduling
@EnableWebSocketMessageBroker
public class Main extends AbstractWebSocketMessageBrokerConfigurer {
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
}
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/ws").setAllowedOrigins("*").withSockJS();
}
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
registry.setApplicationDestinationPrefixes("/app");
registry.enableSimpleBroker("/topic");
}
}
这是JS代码:
<script type="text/javascript">
var stompClient = null;
function connect() {
var socket = new SockJS("http://localhost:8443/ws");
stompClient = Stomp.over(socket);
stompClient.connect({}, function () {
stompClient.subscribe('/topic/updateService', function (data) {
console.log(data);
});
});
}
function disconnect() {
if (stompClient != null) {
stompClient.disconnect();
}
console.log("Disconnected");
}
</script>
答案 1 :(得分:0)
我知道这个问题很旧,但是也许我的回答会对别人有所帮助。
我有一个类似的问题。我的任务是让用户了解一些正在进行的过程,因此我的应用程序必须每5秒发送一条消息。
前端Vue.js应用程序在节点上单独提供。内部组件必须监视我添加的任务:
<script>
import SockJS from 'sockjs-client'
const Stomp = require('stompjs')
const socket = new SockJS('http://localhost:8088/monitor/activity',{transports: ['websocket'] })
// Usual Vue-js stuff
methods: {
subscribe (frame) {
console.log('Subscribed to: ' + frame)
this.stompClient.subscribe('/web-socket/activity', (payload) => {
console.log('Successfully handled message :' + payload)
})
},
connect () {
this.stompClient = Stomp.over(socket)
this.stompClient.connect({}, this.subscribe)
}
},
mounted() {
this.connect
}
</script>
在服务器端(用Kotlin编写的Spring应用程序),我添加了Configuration类
@Configuration
class WebSocketConfig : WebSocketMessageBrokerConfigurer {
override fun registerStompEndpoints(registry: StompEndpointRegistry) {
registry.addEndpoint("/monitor/activity")
.setAllowedOrigins("*")
.withSockJS()
}
}
您可能会看到,我请勿覆盖configureMessageBroker
方法
在主类中,我启用网络套接字和计划
@SpringBootApplication
@EnableScheduling
@EnableWebSocketMessageBroker
@EnableWebSocket
public class SpringBootVuejsApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootVuejsApplication.class, args);
}
}
这是将消息发送到套接字的组件:
@Component
class LoanScheduledCron
@Autowired constructor(
private val messagingTemplate: SimpMessagingTemplate
) {
@Scheduled(fixedDelay = 5000)
fun getSchedulersActivity () {
messagingTemplate.convertAndSend("/web-socket/activity", "Still active")
}
}
请注意,调用方法convertAndSend
时,我必须写完整的目标位置作为参数。