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Java Enterprise Edition (EE)

HttpSessionAttributeListener


javax.servlet.http
Interface HttpSessionAttributeListener

All Superinterfaces:
java.util.EventListener
public interface HttpSessionAttributeListener
extends java.util.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 Summary
 void attributeAdded(HttpSessionBindingEvent event)
          Receives notification that an attribute has been added to a session.
 void attributeRemoved(HttpSessionBindingEvent event)
          Receives notification that an attribute has been removed from a session.
 void attributeReplaced(HttpSessionBindingEvent event)
          Receives notification that an attribute has been replaced in a session.
 

Method Detail

attributeAdded

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

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

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


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