Package jakarta.servlet.http

Interface HttpSessionAttributeListener

All Superinterfaces:
EventListener
public interface HttpSessionAttributeListener
extends EventListener
Interface for receiving notification events about HttpSession attribute changes.

In order to receive these notification events, the implementation class must be either declared in the deployment descriptor of the web application, annotated with WebListener, or registered via one of the addListener methods defined on ServletContext.

The order in which implementations of this interface are invoked is unspecified.

Since:
Servlet 2.3

  • Method Details

    • attributeAdded

      default void attributeAdded​(HttpSessionBindingEvent event)
      Receives notification that an attribute has been added to a session.
      Parameters:
      event - the HttpSessionBindingEvent containing the session and the name and value of the attribute that was added

    • attributeRemoved

      default void attributeRemoved​(HttpSessionBindingEvent event)
      Receives notification that an attribute has been removed from a session.
      Parameters:
      event - the HttpSessionBindingEvent containing the session and the name and value of the attribute that was removed

    • attributeReplaced

      default void attributeReplaced​(HttpSessionBindingEvent event)
      Receives notification that an attribute has been replaced in a session.
      Parameters:
      event - the HttpSessionBindingEvent containing the session and the name and (old) value of the attribute that was replaced