@AuthenticationPrincipal is an empty object in @MessageMapping handler | Java Community | Help. Code. Learn. | Page 1

I'm creating a websocket + REST application in spring using the provided STOMP support.

I'm also using JWT authentication and doing what's said in http://docs.spring.io/spring-framework/reference/web/websocket/stomp/authentication-token-based.html

but when i access the @AuthenticationPrincipal in a @MessagingMapping handler, it's an empty object.

i tried setting the authentication in the SecurityContext too but it's always null. It works with regular REST endpoints though.

The handlers

@RestController
public class HelloWorldController {
    
    @GetMapping("/greeting")
    public String getMethodName(@AuthenticationPrincipal User user) {
        return "HELLO " + user.getUsername(); // Works fine
    }

    @MessageMapping("/meeting")
    public String hello(@Payload String name, @AuthenticationPrincipal User user) {
        return "Hello, " + name + "! your email is " + user.getEmail(); // Hello, <name>! your email is null
    }

}```

But im able to access the principal using the `SimpMessageHeaderAcessor` but i need to type cast twice in each message handler.
Is there a way to obtain the currently authenticated user in a `@MessageMapping` handler?

#@AuthenticationPrincipal is an empty object in @MessageMapping handler