class TrailFilePositionSetter {

  protected synchronized FilePositionResult getFilePosition(long scn, TransactionSCNFinderCallback callback)
    throws IOException
  {
    return getFilePosition(scn,callback,null);
  }

  public  TrailFilePositionSetter(String dir, String filePrefix);
  public  TrailFilePositionSetter(String dir, String filePrefix, String phySourceName);

}