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    1
    2
    3   /*
    4    * The contents of this file are subject to the terms
    5    * of the Common Development and Distribution License
    6    * (the "License").  You may not use this file except
    7    * in compliance with the License.
    8    *
    9    * You can obtain a copy of the license at
    10   * glassfish/bootstrap/legal/CDDLv1.0.txt or
    11   * https://glassfish.dev.java.net/public/CDDLv1.0.html.
    12   * See the License for the specific language governing
    13   * permissions and limitations under the License.
    14   *
    15   * When distributing Covered Code, include this CDDL
    16   * HEADER in each file and include the License file at
    17   * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable,
    18   * add the following below this CDDL HEADER, with the
    19   * fields enclosed by brackets "[]" replaced with your
    20   * own identifying information: Portions Copyright [yyyy]
    21   * [name of copyright owner]
    22   *
    23   * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
    24   *
    25   * Portions Copyright Apache Software Foundation.
    26   */
    27
    28  package javax.servlet;
    29
    30  import java.util.EventListener;
    31
    32      /**
    33       * A ServletRequestAttributeListener can be implemented by the
    34       * developer interested in being notified of request attribute
    35       * changes. Notifications will be generated while the request
    36       * is within the scope of the web application in which the listener
    37       * is registered. A request is defined as coming into scope when
    38       * it is about to enter the first servlet or filter in each web
    39       * application, as going out of scope when it exits the last servlet
    40       * or the first filter in the chain.
    41       *
    42       * @since Servlet 2.4
    43       */
    44
    45  public interface ServletRequestAttributeListener extends EventListener {
    46      /** Notification that a new attribute was added to the
    47       ** servlet request. Called after the attribute is added.
    48       */
    49      public void attributeAdded(ServletRequestAttributeEvent srae);
    50
    51      /** Notification that an existing attribute has been removed from the
    52       ** servlet request. Called after the attribute is removed.
    53       */
    54      public void attributeRemoved(ServletRequestAttributeEvent srae);
    55
    56      /** Notification that an attribute was replaced on the
    57       ** servlet request. Called after the attribute is replaced.
    58       */
    59      public void attributeReplaced(ServletRequestAttributeEvent srae);
    60  }
    61