How to get all active sessions in Spring 5 WebSocket API?

Question

I code WebSocket application with help classical Spring 5 WebSocket API, i.e. without using of SockJS and STOMP. I have a problem to get all active http-sessions. I can get one

Answer 1

The SimpUserRegistry (DefaultSimpUserRegistry) keeps track of connected websocket users.

The method getUsers() returns all the connected users along with their sessions.

Here is a sample code:

@RestController
public class WebSocketController {

    private final SimpUserRegistry simpUserRegistry;

    public WebSocketController(SimpUserRegistry simpUserRegistry) {
        this.simpUserRegistry = simpUserRegistry;
    }

    @GetMapping("/ws/users")
    public List<String> connectedEquipments() {
        return this.simpUserRegistry
                .getUsers()
                .stream()
                .map(SimpUser::getName)
                .collect(Collectors.toList());
    }
}