1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * 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
18 package org.apache.log4j.spi;
19
20 import org.apache.log4j.Appender;
21 import org.apache.log4j.Category;
22
23 /**
24 Listen to events occuring within a {@link
25 org.apache.log4j.Hierarchy Hierarchy}.
26
27 @author Ceki Gülcü
28 @since 1.2
29
30 */
31 public interface HierarchyEventListener {
32
33
34 //public
35 //void categoryCreationEvent(Category cat);
36
37
38 public
39 void addAppenderEvent(Category cat, Appender appender);
40
41 public
42 void removeAppenderEvent(Category cat, Appender appender);
43
44
45 }