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 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
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 * 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
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package jakarta.servlet;

import java.util.EventListener;

Implementations of this interface receive notifications of changes to the attribute list on the servlet context of a web application. To receive notification events, the implementation class must be configured in the deployment descriptor for the web application.
See Also:
  • ServletContextAttributeEvent
Since:v 2.3
/** * Implementations of this interface receive notifications of changes to the * attribute list on the servlet context of a web application. To receive * notification events, the implementation class must be configured in the * deployment descriptor for the web application. * * @see ServletContextAttributeEvent * @since v 2.3 */
public interface ServletContextAttributeListener extends EventListener {
Notification that a new attribute was added to the servlet context. Called after the attribute is added. The default implementation is a NO-OP.
Params:
  • scae – Information about the new attribute
/** * Notification that a new attribute was added to the servlet context. * Called after the attribute is added. * The default implementation is a NO-OP. * @param scae Information about the new attribute */
public default void attributeAdded(ServletContextAttributeEvent scae) { }
Notification that an existing attribute has been removed from the servlet context. Called after the attribute is removed. The default implementation is a NO-OP.
Params:
  • scae – Information about the removed attribute
/** * Notification that an existing attribute has been removed from the servlet * context. Called after the attribute is removed. * The default implementation is a NO-OP. * @param scae Information about the removed attribute */
public default void attributeRemoved(ServletContextAttributeEvent scae) { }
Notification that an attribute on the servlet context has been replaced. Called after the attribute is replaced. The default implementation is a NO-OP.
Params:
  • scae – Information about the replaced attribute
/** * Notification that an attribute on the servlet context has been replaced. * Called after the attribute is replaced. * The default implementation is a NO-OP. * @param scae Information about the replaced attribute */
public default void attributeReplaced(ServletContextAttributeEvent scae) { } }