001/* 002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * bstefanescu 018 * 019 * $Id$ 020 */ 021 022package org.nuxeo.runtime.deploy; 023 024// FIXME: interface has changed and this example is no more appropriate. 025/** 026 * An example of listener implementation: 027 * 028 * <pre> 029 * public class MyListener implements FileChangeListener { 030 * long lastNotif = 0; 031 * 032 * public void fileChanged(File file, long since, long now) { 033 * if (now == lastNotifFlush) 034 * return; 035 * if (isIntersetedInFile(file)) { 036 * lastNotif = now; 037 * flushCache(); // flush internal cache because file on disk changed 038 * } 039 * } 040 * } 041 * </pre> 042 * 043 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 044 */ 045public interface FileChangeListener { 046 047 /** 048 * Notifies that the given file changed. 049 * 050 * @param entry 051 * @param now the time stamp when the change was detected. This value can be used as a notification ID by listeners 052 * to avoid multiple processing for notification that will send multiple events 053 */ 054 void fileChanged(FileChangeNotifier.FileEntry entry, long now); 055 056}