1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*
* 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;
import java.util.EventListener;
/**
* A ServletRequestAttributeListener can be implemented by the developer interested in being notified of request
* attribute changes. Notifications will be generated while the request is within the scope of the web application in
* which the listener is registered. A request is defined as coming into scope when it is about to enter the first
* servlet or filter in each web application, as going out of scope when it exits the last servlet or the first filter
* in the chain.
*
* @since Servlet 2.4
*/
public interface ServletRequestAttributeListener extends EventListener {
/**
* Notification that a new attribute was added to the servlet request. Called after the attribute is added. The
* default implementation is a NO-OP.
*
* @param srae Information about the new request attribute
*/
default void attributeAdded(ServletRequestAttributeEvent srae) {
}
/**
* Notification that an existing attribute has been removed from the servlet request. Called after the attribute is
* removed. The default implementation is a NO-OP.
*
* @param srae Information about the removed request attribute
*/
default void attributeRemoved(ServletRequestAttributeEvent srae) {
}
/**
* Notification that an attribute was replaced on the servlet request. Called after the attribute is replaced. The
* default implementation is a NO-OP.
*
* @param srae Information about the replaced request attribute
*/
default void attributeReplaced(ServletRequestAttributeEvent srae) {
}
}
|
