java - 如何根据事件更新多个 session

Question

在我们的 Web 应用程序中(在使用 Struts 的 JBoss 中)，我们使用 session 主要是为了安全以及为用户缓存一些数据。因此，每个登录到应用程序的用户都有一个 session 和缓存在其中的不同数据。

基于某些参数更改，我想更改已登录用户子集(即具有 session )的缓存

这能实现吗？到目前为止，我还没有从一般搜索中找到任何东西。

Answer 1

您可以使用HttpAttributeListener

一个基本示例 here

HttpSessionAttributeListener:

The HttpSessionAttributeListener interface enables an object to monitor changes to the attribute lists of sessions within a given Web application. The HttpSessionAttributeListener in turn extends java.util.EventListener. The methods in it are

• attributeAdded(HttpSessionBindingEvent se)- This is the notification that an attribute has been added to a session.
• attributeRemoved(HttpSessionBindingEvent se)- This is the notification that an attribute has been removed from a session.
• attributeReplaced(HttpSessionBindingEvent se)- This is the notification that an attribute has been replaced in a session.