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.logging.log4j.core.util; 18 19 import java.io.File; 20 21 /** 22 * Watches for changes in a {@link File} and performs an action when the file is modified. 23 * 24 * @see WatchManager 25 */ 26 public interface FileWatcher { 27 28 /** 29 * Called when a {@link WatchManager} detects that the given {@link File} changed. 30 * 31 * @param file 32 * the file that changed. 33 * @see WatchManager 34 */ 35 void fileModified(File file); 36 }