001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017package org.apache.logging.log4j.core.util; 018 019import java.io.File; 020 021/** 022 * Watches for changes in a {@link File} and performs an action when the file is modified. 023 * 024 * @see WatchManager 025 */ 026public interface FileWatcher { 027 028 /** 029 * Called when a {@link WatchManager} detects that the given {@link File} changed. 030 * 031 * @param file 032 * the file that changed. 033 * @see WatchManager 034 */ 035 void fileModified(File file); 036}