@ServerEndpoint可以是EJB，但不能是普通的CDI bean吗？

Question

I've just got a following problem and can not figure out an answer:

@ServerEndpoint("/websocket/server")
public class ServerUpdateEndpoint implements Serializable {
    ...@OnOpen, OnMessage OnClose annoted methods, works fine...

    @PostConstruct
    public void start() {
        logger.log(Level.INFO, "ServerUpdateEndpoint start");
    }

    @PreDestroy
    public void stop() {
        logger.log(Level.INFO, "ServerUpdateEndpoint stop");
    }

}

When I annotate this class with @Named lifecycle callbacks @PostConstruct, @PreDestroy never gets executed.

When I annotate this with @Singleton it works fine.

Can anyone explain, what the problem with plain CDI annotations here?

Answer 1

It definitely can have CDI annotations only. You'll need to annotate it @ApplicationScoped and ensure that a client connects to the endpoint. Were you giving it a scope when you added @Named ?