89 lines
2.8 KiB
Java
89 lines
2.8 KiB
Java
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Ziver Koc
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package zutil.io.file;
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import zutil.io.MultiPrintStream;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.util.Timer;
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import java.util.TimerTask;
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/**
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* This class calls a given listener
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* when a file is changed
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*
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* @author Ziver
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*
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*/
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public class FileWatcher extends TimerTask{
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private FileChangeListener listener;
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private long lastChanged;
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private File file;
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/**
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* Creates a watcher for the given file whit the check
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* interval of 1 second
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*
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* @param file is the file to check
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*/
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public FileWatcher(File file) throws FileNotFoundException{
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this(file, 1000);
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}
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/**
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* Creates a watcher for the given file whit the given
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* check interval
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*
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* @param file is the file
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* @param interval is the interval
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*/
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public FileWatcher(File file, int interval) throws FileNotFoundException{
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if(file==null || !file.exists())
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throw new FileNotFoundException("File not found: "+file);
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this.file = file;
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lastChanged = file.lastModified();
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Timer t = new Timer(true);
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t.schedule(this, 0, interval);
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}
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public void setListener(FileChangeListener listener){
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this.listener = listener;
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}
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@Override
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public void run() {
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if (lastChanged != file.lastModified()) {
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lastChanged = file.lastModified();
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if(listener != null){
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listener.fileChangedEvent(file);
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}
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else{
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MultiPrintStream.out.println("File Changed: "+file);
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}
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}
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}
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}
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