1 /* 2 * Copyright (c) 2009 QOS.ch All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 package ch.qos.cal10n.util; 23 24 import java.io.File; 25 import java.io.IOException; 26 import java.io.InputStream; 27 import java.util.PropertyResourceBundle; 28 import java.util.ResourceBundle; 29 30 public class CAL10NPropertyResourceBundle extends PropertyResourceBundle { 31 32 static long CHECK_DELAY = 10 * 60 * 1000; // 10 minutes delay 33 34 File hostFile; 35 volatile long nextCheck; 36 long lastModified; 37 38 public CAL10NPropertyResourceBundle(InputStream is, File file) 39 throws IOException { 40 super(is); 41 this.hostFile = file; 42 nextCheck = System.currentTimeMillis() + CHECK_DELAY; 43 } 44 45 public void setParent(ResourceBundle parent) { 46 super.setParent(parent); 47 } 48 49 public boolean hasChanged() { 50 // if the host file is unknown, no point in a check 51 if (hostFile == null) { 52 return false; 53 } 54 55 long now = System.currentTimeMillis(); 56 if (now < nextCheck) { 57 return false; 58 } else { 59 nextCheck = now + CHECK_DELAY; 60 if (lastModified != hostFile.lastModified()) { 61 lastModified = hostFile.lastModified(); 62 return true; 63 } else { 64 return false; 65 } 66 } 67 } 68 69 /** 70 * WARNING: Used for testing purposes. Do not invoke directly in user code. 71 */ 72 public void resetCheckTimes() { 73 nextCheck = 0; 74 lastModified = 0; 75 } 76 }