会话范围的托管bean在过滤器中不可用作会话属性 [英] Session scoped managed bean not available as session attribute in filter

问题描述

遵循 JSF HTTP会话登录教程后，我尝试单击页面并将其重定向我总是到登录页面(没有CSS).我尝试使用以下代码进行调试:

After following the JSF HTTP Session Login tutorial, i tried clicking on pages and it redirected me always to the login page (without css). I tried debugging using the code below:

Enumeration<String> attributeNames = wrappedRequest.getSession().getAttributeNames();
    while(attributeNames.hasMoreElements()) {
                System.out.println(attributeNames.nextElement());
    }

发现我希望返回的课程是

and found that the class I expected to be return at

ConnectionManager manager = (ConnectionManager) wrappedRequest.getSession()
            .getAttribute("connectionManager");

未返回.如服务器日志中所示，返回了其他一些类而不是ConnectionManager类.

wasn't returned. Some other class was returned instead of ConnectionManager class as seen in the server log.

Info:   employeeManager
Info:   org.jboss.weld.context.beanstore.http.LockStore
Info:   com.sun.faces.renderkit.ServerSideStateHelper.LogicalViewMap
Info:   org.jboss.weld.context.conversation.ConversationIdGenerator
Info:   org.jboss.weld.context.ConversationContext.conversations
Info:   javax.faces.request.charset

EmployeeManager是另一个托管bean.我能知道为什么这是回报吗?

EmployeeManager is another managed bean. Can I know why this is return instead?

推荐答案

该答案基于 ConnectionManager 是JSF托管bean.但是，基于会话中特定于CDI的对象的存在，您似乎正在使用CDI @Named 而不是JSF @ManagedBean 来管理Bean(本身就是一件好事).

That answer was based on the ConnectionManager being a JSF managed bean. However, based on presence of CDI-specific objects in the session, it looks like that you're using CDI @Named instead of JSF @ManagedBean to manage beans (which is at its own a Good Thing though).

您可以将其 @Inject 放入过滤器中，而不是从HTTP会话中手动获取它.

You could just @Inject it into the filter instead of manually grabbing it from the HTTP session.

@Inject
private ConnectionManager connectionManager;

另请参见:

• 按名称获取JSF托管bean任何与Servlet相关的类
• 支持bean(@ManagedBean)或CDI Beans(@命名)?

这篇关于会话范围的托管bean在过滤器中不可用作会话属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！