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Vakils
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Rename file in Java

Hi,
I am renaming a file in Java on Linux O/S. The function renameTo returns true but file does not get renamed half the time. The file resides on a mounted folder on Linux machine. The code is below:

        // Rename the file with an appended .LOAD extension, so that next time
    // this program will not pickup the same file again
      String renameToFile = filename + ".load";             //filename is valid file name
      File sourceFile = new File(filename);
    if (sourceFile.renameTo(new File(renameToFile)))
    {
     //success, verify now
      File destFile = new File(renameToFile);
      boolean renamed = false;
      while (TIMES_TO_RENAME_VERIFY-- > 0)             //5 times
      {
        try
        {
          Thread.sleep(RETRY_WAIT_TIME); //wait to confirm renaming        6000ms
          if (destFile.exists())
          {
            renamed = true;
            break;
          }
        }
        catch (InterruptedException ie)
        {
          log.exception("File rename wait exception ", ie);
        }
      }

      if (renamed)
        log.info("Successfully renamed the file " + filename +
                            " to append .load at the end");
      else
      {
        log.error("Failed to verify renamed file " + filename + ".load"); //this is the error I get
              return;
      }
    }
    else
    {
      log.error("Unable to rename the file " + filename + " to append .load at the end");
      return;
    }
JavaProgramming Languages-Other

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Last Comment
Vakils

8/22/2022 - Mon
Michael Fowler

Try using Files.Move instead

String renameToFile = filename + ".load";
File sourceFile = new File(filename);
try {
     Files.move(sourceFile, sourceFile.resolveSibling(renameToFile));
} catch (IOException e) {
     log.error("Unable to rename the file " + filename + " to append .load at the end");
}

Open in new window


If your code only needs to be run on Linux another option would be to use Process Builder to run a Linux command such as mv although this method would be less than ideal.

https://docs.oracle.com/javase/6/docs/api/java/lang/ProcessBuilder.html
https://www.udemy.com/blog/rename-a-file-in-linux/
Am P

Check the location where the file is being created.

       // Rename the file with an appended .LOAD extension, so that next time
    // this program will not pickup the same file again
      String renameToFile = filename + ".load";             //filename is valid file name
      File sourceFile = new File(filename);
    if (sourceFile.renameTo(new File(renameToFile)))
    {
     //success, verify now
      File destFile = new File(renameToFile);
      System.out.println("File Path : "+ destFile.getAbsolutePath());
      boolean renamed = false;
      while (TIMES_TO_RENAME_VERIFY-- > 0)             //5 times
      {
        try
        {
          Thread.sleep(RETRY_WAIT_TIME); //wait to confirm renaming        6000ms
          if (destFile.exists())
          {
            renamed = true;
            break;
          }
        }
        catch (InterruptedException ie)
        {
          log.exception("File rename wait exception ", ie);
        }
      }

      if (renamed)
        log.info("Successfully renamed the file " + filename +
                            " to append .load at the end");
      else
      {
        log.error("Failed to verify renamed file " + filename + ".load"); //this is the error I get
              return;
      }
    }
    else
    {
      log.error("Unable to rename the file " + filename + " to append .load at the end");
      return;
    }
Vakils

ASKER
Sorry but I forgot to mention we are limited by Java 1.5
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Michael Fowler

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Vakils

ASKER
Thanks guys for your efforts. It seems best solution is to move out of Java 1.5