Question

我正在玩w / EE并希望保持用户会话状态。我在这里有会话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;
    }
}

这里有一个servlet（GameState是一个按预期工作的Application Scoped bean，CustomExtendedHttpServlet只是HttpServlet的一个简单扩展）

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New User Joined servlet时，我会在第一次调用时得到此响应（如预期的那样）：

“嗨，你的身份证是：，这里还有其他1名球员”

在同一个会话中重复相同的servlet调用会给出相同的消息： “嗨，你的身份证是：，这里还有其他2名球员” ...

看起来像是一次又一次地创建用户会话状态的新实例。我这样做了吗？

编辑1：这里是我用来发送请求的代码。看来我正在为每个请求获得一个新的会话ID，这可能是什么原因？

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

找出问题，

原来我在GWT客户端有一个旧的解决方法，正在更改主机以解决CORS问题。由于响应与原点不匹配，因此未将cookie与未来的servlet GET调用一起发送。

Answer 2

您是否尝试过调用request.getSession（true）以确保在此处建立EE HTTPSession？

GWT＆amp; Java EE SessionScoped bean不会持久化

2 个答案: