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 }