java – identity.logout()之后的ViewExpiredException;在JBoss Seam

在我的AuthenticationFilter重定向到登录页面后,我想退出给用户.

这就是为什么,我把identity.logout();在我的预渲染方法login.xhtml的checkPermission(…)中.

但是,当用户再次登录时,我得到了ViewExpiredException.

我的问题是

1：如果我不执行identity.logout();,则由于旧用户会话仍然存在,用户再次重新登录.
2：如果我执行identity.logout();,我会收到ViewExpiredException.

AuthenticationFilter.java

public class AuthenticationFilter implements Filter  {
    .....

    public void doFilter(ServletRequest servletRequest,ServletResponse servletResponse,FilterChain filterChain) throws IOException,ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;
        HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
        HttpSession session = httpRequest.getSession();
        User user = (User) session.getAttribute(Constants.LOGIN_USER);
        if (user == null) {
            session.setAttribute(Constants.MESSAGE_ID,MessageId.REQUIRED_TO_LOGIN);
            String loginView = httpRequest.getContextPath() + Constants.LOGIN_PAGE;
            httpResponse.sendRedirect(loginView);
        } else if (!user.getRole().equals(Role.SYSTEM_ADMINISTRATOR)) {
            System.out.println("User Role : " + user.getRole());
            session.setAttribute(Constants.MESSAGE_ID,MessageId.REQUIRED_TO_ADMIN_ROLE);
            String loginView = httpRequest.getContextPath() + Constants.LOGIN_PAGE;
            httpResponse.sendRedirect(loginView);
        } else {
            filterChain.doFilter(servletRequest,servletResponse);
        }
        servletContext.log("Exiting the filter");
    }

    public void destroy() {
    }
}

login.xhtml

....
<f:event listener="#{LoginBean.checkPermission}" type="preRenderView" />
....

LoginBean.java

@Scope(ScopeType.EVENT)
@Name("LoginBean")
public class LoginBean extends BaseBean {
    ....

    public boolean authenticate() {
        ....
    }

    public void checkPermission(ComponentSystemEvent event) {
        FacesContext context = getFacesContext();
        ExternalContext  extContext = context.getExternalContext();
        String messageId = (String) extContext.getSessionMap().remove(Constants.MESSAGE_ID);
        if(messageId != null) {
            identity.logout();
            addMessage(null,FacesMessage.SEVERITY_ERROR,messageId);   
        }
    }
}

解决方法

if(...) {
    session.invalidate();
    session = httpRequest.getSession(true); 
    ....
} else if(...){
    session.invalidate();
    session = httpRequest.getSession(true); 
    ....
}

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