View Javadoc

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  package org.apache.log4j.spi;
18  
19  import org.apache.log4j.Appender;
20  import org.apache.log4j.Category;
21  
22  /**
23   Listen to events occurring within a Hierarchy.
24  
25   @since 1.2
26  
27   */
28  public interface HierarchyEventListener {
29  
30      void addAppenderEvent(Category cat, Appender appender);
31  
32      void removeAppenderEvent(Category cat, Appender appender);
33  }