java/test/IceUtil/fileLock/ClientFail.java

   1 // **********************************************************************
   2 //
   3 // Copyright (c) 2003-2011 ZeroC, Inc. All rights reserved.
   4 //
   5 // This copy of Ice is licensed to you under the terms described in the
   6 // ICE_LICENSE file included in this distribution.
   7 //
   8 // **********************************************************************
   9
  10 package test.IceUtil.fileLock;
  11
  12 import java.io.BufferedReader;
  13 import java.io.InputStreamReader;
  14
  15 import java.io.File;
  16 import java.io.RandomAccessFile;
  17 import java.io.EOFException;
  18 import java.io.UTFDataFormatException;
  19 import java.io.IOException;
  20
  21
  22 public class ClientFail
  23 {
  24     private static void
  25     test(boolean b)
  26     {
  27         if(!b)
  28         {
  29             throw new RuntimeException();
  30         }
  31     }
  32
  33     public static void
  34     main(String[] argvs)
  35     {
  36         IceUtilInternal.FileLock lock = null;
  37         try
  38         {
  39             lock = new IceUtilInternal.FileLock("file.lock");
  40             test(false);
  41         }
  42         catch(IceUtil.FileLockException ex)
  43         {
  44             System.out.println("File lock not acquired.");
  45             //
  46             // Try to read the pid of the lock owner from the lock file, in Windows
  47             // we don't write pid to lock files.
  48             //
  49             if(!System.getProperty("os.name").startsWith("Windows"))
  50             {
  51                 String pid = "";
  52                 try
  53                 {
  54                     RandomAccessFile file = new RandomAccessFile(new File("file.lock"), "r");
  55                     pid = file.readUTF();
  56                 }
  57                 catch(EOFException eofEx)
  58                 {
  59                     System.out.println("exception:\n" + eofEx.toString());
  60                     test(false);
  61                 }
  62                 catch(UTFDataFormatException utfEx)
  63                 {
  64                     System.out.println("exception:\n" + utfEx.toString());
  65                     test(false);
  66                 }
  67                 catch(IOException ioEx)
  68                 {
  69                     System.out.println("exception:\n" + ioEx.toString());
  70                     test(false);
  71                 }
  72
  73                 if(pid.length() == 0)
  74                 {
  75                     test(false);
  76                 }
  77                 System.out.println("Lock owned by: " + pid);
  78             }
  79         }
  80     }
  81 }