geronimo-servlet_3.0_spec/src/main/java/javax/servlet/http/HttpSessionActivationListener.java

/*
 * 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
 *
 * 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 javax.servlet.http;

import java.util.EventListener;

/**
 * Objects that are bound to a session may listen to container
 * events notifying them that sessions will be passivated and that
 * session will be activated. A container that migrates session between VMs
 * or persists sessions is required to notify all attributes bound to sessions
 * implementing HttpSessionActivationListener.
 *
 * @version $Rev$ $Date$
 * @since 2.3
 */

public interface HttpSessionActivationListener extends EventListener {

    /**
     * Notification that the session is about to be passivated.
     */
    void sessionWillPassivate(HttpSessionEvent se);

    /**
     * Notification that the session has just been activated.
     */
    void sessionDidActivate(HttpSessionEvent se);
}