code: @Override
  	public long getLogFileTimestamp(File file) {
  		String name = file.getName();
  		// Check name for extension
  		if (name == null || name.length() == 0 || !name.startsWith(TEXTLOGPREF) || !name.endsWith(TEXTLOGEXT)) {
  			return -1L;
  		}
  		long result = -1L;
  		try {
  			Date date = DATEFORMAT.parse(name.substring(TEXTLOGPREF.length(), name.length() - TEXTLOGEXT.length()));
  			result = date.getTime();
  		} catch (ParseException ex) {
  			// Fall through to return -1L;
  		}
  		return result;
  	}
docs: /*
  @Override public String getLogFilePid(File file) { return ""; }