GWT & Java EE SessionScoped bean 不持久

Question

我正在玩 EE 并希望保留用户会话状态。我这里有会话 bean：

@Stateful(mappedName = "UserSessionState")
@Named("UserSessionState")
@SessionScoped
@StatefulTimeout(value = 5, unit = TimeUnit.MINUTES)
public class UserSessionState implements Serializable
{
    private boolean hasPlayerId = false;
    private String playerId = "";

    public void setRandomPlayerId()
    {
        playerId = UUID.uuid();
        hasPlayerId = true;
    }

    public boolean hasPlayerId()
    {
        return hasPlayerId;
    }

    public String getPlayerId()
    {
        return playerId;
    }
}

这里是一个 servlet（GameState 是一个按预期工作的 Application Scoped bean，CustomExtendedHttpServlet 只是 HttpServlet 的简单扩展）

public class NewUserJoined extends CustomExtendedHttpServlet
{
    @Inject
    protected GameState gameState;

    @Inject 
    protected UserSessionState user;

    @Override
    protected String doGetImpl(HttpServletRequest request, HttpServletResponse response, UserContext userLoginContext)
    {
        if (!user.hasPlayerId())
        {
            user.setRandomPlayerId();
        }        
        String userId = user.getPlayerId();

        if (!gameState.hasUser(userId))
        {
            gameState.addUser(userId, user);
            return "Hi, your ID is: " + user.getPlayerId() + ", there are " + gameState.getUserCount() + " other players here";
        }
        else
        {
            return user.getPlayerId() + " you're already in the game, there are: " + gameState.getUserCount() + " other players here";
        }
    }
}

我不确定发生了什么，但每当我从同一个 HTTP 会话调用新用户加入 servlet 时，我都会在第一次调用时收到此响应（如预期的那样）：

"Hi, your ID is: , there are 1 other players here"

在同一个会话中重复同一个 servlet 调用会给我同样的信息： "Hi, your ID is: , there are 2 other players here" ...

看起来用户会话状态的新实例被一遍又一遍地创建。我这样做正确吗？

编辑 1：这是我用来发送请求的代码。我似乎在每次请求时都获得了一个新的会话 ID，这可能是什么原因造成的？

RequestCallback callback = new RequestCallback()
{
    @Override
    public void onResponseReceived(Request request, Response response)
    {
        log(response.getText());
    }

    @Override
    public void onError(Request request, Throwable exception)
    {
        log(
            "Response Error | "
            + "Exception: " + exception);
    }
};

RequestBuilder rb = new RequestBuilder(RequestBuilder.GET, SERVLET_URL);
rb.setCallback(callback);

try
{
    rb.send();
}
catch (RequestException e)
{
    log("Response Error | "
        + "Exception: " + e);
}

Answer 1

您是否尝试调用 request.getSession(true) 以确保此处建立了 EE HTTPSession？

Answer 2

解决了问题，

原来我在 GWT 客户端中有一个旧的解决方法，它正在更改主机以解决 CORS 问题。因为响应与源不匹配，所以 cookie 没有通过未来的 servlet GET 调用发送。

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