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1   /*
2    * $Id: AbstractFileWatcher.java 19191 2010-08-25 21:05:23Z tcarlson $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.module.launcher;
12  
13  import java.io.File;
14  
15  public abstract class AbstractFileWatcher implements Runnable
16  {
17  
18      private long timeStamp;
19      private File file;
20  
21      public AbstractFileWatcher(File file)
22      {
23          this.file = file;
24          this.timeStamp = file.lastModified();
25      }
26  
27      public final void run()
28      {
29          long timeStamp = file.lastModified();
30  
31          if (this.timeStamp != timeStamp)
32          {
33              this.timeStamp = timeStamp;
34              onChange(file);
35          }
36      }
37  
38      protected abstract void onChange(File file);
39  }