I want to send notification to specific client.
e.g username user
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfiguration extends
AbstractWebSocketMessageBrokerConfigurer {
@Override
public void registerStompEndpoints(StompEndpointRegistry stompEndpointRegistry) {
stompEndpointRegistry.addEndpoint("/socket")
.setAllowedOrigins("*")
.withSockJS();
}
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
registry.enableSimpleBroker("/topic", "/queue");
registry.setApplicationDestinationPrefixes("/app");
}
Controller
@GetMapping("/notify")
public String getNotification(Principal principal) {
String username = "user";
notifications.increment();
logger.info("counter" + notifications.getCount() + "" + principal.getName());
// logger.info("usersend:"+sha.getUser().getName()) ; //user
template.convertAndSendToUser(principal.getName(), "queue/notification", notifications);
return "Notifications successfully sent to Angular !";
}
Client-Side
Angular Service
connect() {
let socket = new SockJs(`api/socket`);
let stompClient = Stomp.over(socket);
return stompClient;
}
Angular Component
let stompClient = this.webSocketService.connect();
stompClient.connect({}, frame => {
stompClient.subscribe('/user/queue/notification', notifications => {
console.log('test'+notifications)
this.notifications = JSON.parse(notifications.body).count;
}) });
I am have searched many other questions and tried but none of them worked for me e.g here answered by Thanh Nguyen Van and here
Console
Opening Web Socket...
stomp.js:134 Web Socket Opened...
stomp.js:134 >>> CONNECT
accept-version:1.1,1.0
heart-beat:10000,10000
stomp.js:134 <<< CONNECTED
version:1.1
heart-beat:0,0
stomp.js:134 connected to server undefined
reminder.component.ts:18 test callsed
stomp.js:134 >>> SUBSCRIBE
id:sub-0
destination:/user/queue/notification
thanks in advance .
The answer of gerrytan to Sending message to specific user on Spring Websocket mentions a web socket configuration change, to register the /user prefix. In your case I guess it means to replace
registry.enableSimpleBroker("/topic", "/queue");
with
registry.enableSimpleBroker("/topic", "/queue", "/user");
He also says that in controller you don't need the /user prefix because it is added automatically. So you could try this:
template.convertAndSendToUser(principal.getName(), "/queue/notification", notifications);
and this:
template.convertAndSendToUser(principal.getName(), "/user/queue/notification", notifications);
On the client side you need to provide the username that you used to connect to server. You might insert it directly:
stompClient.subscribe('/user/naila/queue/notification', ...)
or get it from a header. But Markus says at How to send websocket message to concrete user? that even here you don't need the username, so it might work like this:
stompClient.subscribe('/user/queue/notification', ...)