01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package javax.servlet.http;
18:
19: import java.util.EventListener;
20:
21: /** This listener interface can be implemented in order to
22: * get notifications of changes to the attribute lists of sessions within
23: * this web application.
24: * @since v 2.3
25: */
26:
27: public interface HttpSessionAttributeListener extends EventListener {
28: /** Notification that an attribute has been added to a session. Called after the attribute is added.*/
29: public void attributeAdded(HttpSessionBindingEvent se);
30:
31: /** Notification that an attribute has been removed from a session. Called after the attribute is removed. */
32: public void attributeRemoved(HttpSessionBindingEvent se);
33:
34: /** Notification that an attribute has been replaced in a session. Called after the attribute is replaced. */
35: public void attributeReplaced(HttpSessionBindingEvent se);
36:
37: }
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