Send Notification to specific user in spring boot websocket

Question

I want to send notification to specific client.

e.g username user

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfiguration exten         


        

Answer 1

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', ...)

Answer 2

Seems you are missing a slash in your destination:

template.convertAndSendToUser(principal.getName(), "/queue/notification", notifications);