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HttpSessionBindingListener.java
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HttpSessionBindingListener.java
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/*
* Copyright (c) 1997, 2023 Oracle and/or its affiliates and others.
* All rights reserved.
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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
* {@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.
*
*
* @author Various
*
* @see HttpSession
* @see HttpSessionBindingEvent
*
*/
public interface HttpSessionBindingListener extends EventListener {
/**
*
* Notifies the object that it is being bound to a session and identifies the session.
*
* @implSpec The default implementation takes no action.
*
* @param event the event that identifies the session
*
* @see #valueUnbound
*
*/
default void valueBound(HttpSessionBindingEvent event) {
}
/**
*
* Notifies the object that it is being unbound from a session and identifies the session.
*
* @implSpec The default implementation takes no action.
*
* @param event the event that identifies the session
*
* @see #valueBound
*
*/
default void valueUnbound(HttpSessionBindingEvent event) {
}
}