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Editorial Team
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Asked: 2026-06-18T06:12:16+00:00

In our web application (in JBoss using Struts) we use sessions largely for security

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In our web application (in JBoss using Struts) we use sessions largely for security as well as to cache some data for a User. Thus, every user logged into the application has a session and different data cached in it.

Based on some parameter change, i want to change the cache of the subset of users who are logged in (i.e. have session)

Can this be achieved? I have not been able to find anything so far from general search.

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1 Answer

  1. Editorial Team

    You can use a HttpAttributeListener

    a basic example 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.
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