Java EE 8 Cookbook

How to do it...

1. Let's first create a User POJO:

public class User implements Serializable{    private Long id;    private String name;        public User(long id, String name){        this.id = id;        this.name = name;    }    public Long getId() {        return id;    }    public void setId(Long id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    }

2. And then, let's create a REST endpoint with event and observer features:

@Stateless@Path("asyncService")public class AsyncService {        @Inject    private Event<User> event;        private AsyncResponse response;        @GET    public void asyncService(@Suspended AsyncResponse response){        long id = new Date().getTime();        this.response = response; event.fireAsync(new User(id, "User " + id)); ...