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 }