Java EE 8 Cookbook

How to do it...

1. First, we 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. Then, create a slow UserBean to return a User:

@Statelesspublic class UserBean {        public User getUser(){        long id = new Date().getTime();        try {            TimeUnit.SECONDS.sleep(5);            return new User(id, "User " + id);        } catch (InterruptedException ex) {            System.err.println(ex.getMessage());            return new User(id, "Error " + id);        }    }}

3. And finally, create our asynchronous servlet: