IceFaces Session Expiry 导致异常

Question

我的 IceFaces 应用程序在会话到期时崩溃。它没有显示“用户会话已过期”或“网络连接中断”消息。

我的猜测是再次加载相同的页面，并且由于支持 bean 代码找不到会话变量，它会抛出以下异常：

exception
javax.servlet.ServletException: java.lang.Exception: javax.faces.FacesException: Problem in renderResponse: /main-template.jspx: User session has expired or it was invalidated.

root cause
java.lang.Exception: javax.faces.FacesException: Problem in renderResponse: /main-template.jspx: User session has expired or it was invalidated.

root cause
javax.faces.FacesException: Problem in renderResponse: /main-template.jspx: User session has expired or it was invalidated.

root cause
javax.el.ELException: /main-template.jspx: User session has expired or it was invalidated.

root cause
com.icesoft.faces.webapp.http.core.SessionExpiredException: User session has expired or it was invalidated.

root cause
java.lang.IllegalStateException: PWC2778: getAttribute: Session already invalidated

异步更新开启，jsp页面有<ice:outputConnectionStatus />组件。

关于如何阻止这种情况发生的任何想法？

注意：我做了很多花哨的事情，比如在会话超时时重定向，并显示 java.lang.Throwable 的错误页面，但我已经全部注释掉了 - 没有运气。当重定向和错误处理都打开时，应用程序第一次会显示错误页面，然后在一段时间后重定向到“会话到期”页面。

谢谢

Answer 1

我在 RichFaces 上遇到了同样的问题，这个答案救了我：

jsf login times out

对于很多转身和奇怪的事情，我建议看看这个博客：

http://balusc.blogspot.com/

这是我目前使用的代码：

package com.spectotechnologies.jsf.viewhandler;

import com.sun.facelets.FaceletViewHandler;
import java.io.IOException;
import javax.faces.application.ViewHandler;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;

/**
 * Source : https://stackoverflow.com/questions/231191/jsf-login-times-out
 *
 * This ViewHandler is used to remove the ViewExpiredException problem at login
 * after the session is expired.
 *
 * @author Alexandre Lavoie
 */
public class AutoRegeneratorViewHandler extends FaceletViewHandler
{
    public AutoRegeneratorViewHandler(ViewHandler p_oViewHandler)
    {
        super(p_oViewHandler);
    }

    @Override
    public UIViewRoot restoreView(FacesContext p_oContext, String p_sViewID)
    {
        UIViewRoot oViewRoot = super.restoreView(p_oContext,p_sViewID);

        if(oViewRoot == null)
        {
            // Work around Facelet issue
            initialize(p_oContext);

            oViewRoot = super.createView(p_oContext,p_sViewID);
            p_oContext.setViewRoot(oViewRoot);

            try
            {
                buildView(p_oContext,oViewRoot);
            }
            catch(IOException e)
            {
                e.printStackTrace();
            }
        }

        return oViewRoot;
    }
}

你还必须把它放在 faces-config.xml 中：

<application>
    <view-handler>com.spectotechnologies.jsf.viewhandler.AutoRegeneratorViewHandler</view-handler>
</application>