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 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
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 *     http://www.apache.org/licenses/LICENSE-2.0
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package jakarta.servlet.http;

import java.util.EventListener;

Causes an object to be notified when it is bound to or unbound from a session. The object is notified by an HttpSessionBindingEvent object. This may be as a result of a servlet programmer explicitly unbinding an attribute from a session, due to a session being invalidated, or due to a session timing out.
See Also:
/** * Causes an object to be notified when it is bound to or unbound from a * session. The object is notified by an {@link HttpSessionBindingEvent} object. * This may be as a result of a servlet programmer explicitly unbinding an * attribute from a session, due to a session being invalidated, or due to a * session timing out. * * @see HttpSession * @see HttpSessionBindingEvent */
public interface HttpSessionBindingListener extends EventListener {
Notifies the object that it is being bound to a session and identifies the session. The default implementation is a NO-OP.
Params:
  • event – the event that identifies the session
See Also:
/** * Notifies the object that it is being bound to a session and identifies * the session. * The default implementation is a NO-OP. * * @param event * the event that identifies the session * @see #valueUnbound */
public default void valueBound(HttpSessionBindingEvent event) { }
Notifies the object that it is being unbound from a session and identifies the session. The default implementation is a NO-OP.
Params:
  • event – the event that identifies the session
See Also:
/** * Notifies the object that it is being unbound from a session and * identifies the session. * The default implementation is a NO-OP. * * @param event * the event that identifies the session * @see #valueBound */
public default void valueUnbound(HttpSessionBindingEvent event) { } }